Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| entomopathogenic fungi detection and avoidance by mole crickets (orthoptera: gryllotalpidae). | a chamber to monitor mole cricket behavior was designed using two different soil-filled containers and photosensors constructed from infrared emitters and detectors. mole crickets (scapteriscus spp.) were introduced into a center tube that allowed them to choose whether to enter and tunnel in untreated soil or soil treated with beauveria bassiana (balsamo) vuillemin. each time the cricket passed through the photosensor located near the entrance of soil-filled containers, the infrared light was b ... | 2007 | 17349130 |
| [molecular evaluation on the efficacy of sustainable control of monochamus alternatus by non-woven fabric fungal bands impregnated with beauveria bassiana]. | by using molecular marker of group i intron, a field evaluation was made on the efficacy of sustainable control of monochamus alternatus by non-woven fabric bands impregnated with beauveria bassiana. the results showed that the control efficacy in two treated plots was 19.5% and 10.8%, and 14.2% and 11% when evaluated with conventional and molecular evaluation methods, respectively, suggesting that the conventional method which evaluated the control efficacy in terms of microbes mortality or inf ... | 2007 | 17552194 |
| inoculation of coffee plants with the fungal entomopathogen beauveria bassiana (ascomycota: hypocreales). | the entomopathogenic fungus beauveria bassiana was established in coffee seedlings after fungal spore suspensions were applied as foliar sprays, stem injections, or soil drenches. direct injection yielded the highest post-inoculation recovery of endophytic b. bassiana. establishment, based on percent recovery of b. bassiana, decreased as time post-inoculation increased in all treatments. several other endophytes were isolated from the seedlings and could have negatively influenced establishment ... | 2007 | 17604149 |
| control of the sheep scab mite psoroptes ovis in vivo and in vitro using fungal pathogens. | as part of a research programme designed to identify biological agents for the control of sheep scab, the pathogenicity of the fungus metarhizium anisopliae to psoroptes mites in the presence of sheepskin and wool was examined in the laboratory. no inhibitory effects of skin and wool were observed and high levels of infection were recorded. subsequently the pathogenicity of formulations of both m. anisopliae and beauveria bassiana to psoroptes ovis was studied in vivo. for this, 36 batches of 20 ... | 2007 | 17624674 |
| analysis of differential gene expression in the generalist entomopathogenic fungus beauveria bassiana (bals.) vuillemin grown on different insect cuticular extracts and synthetic medium through cdna-aflps. | the entomopathogen beauveria bassiana has an extremely diverse insect host range in addition to a saprophytic phase. the molecular basis for this plasticity was investigated by a comparative analysis of gene expression patterns through cdna-aflps of a b. bassiana isolate grown on cuticular extracts of insects of diverse orders as well as synthetic medium. for some of the fragments, expression patterns were verified by q-rt-pcr. among the differentially expressed genes two proteases were identifi ... | 2007 | 17723310 |
| factors affecting the occurrence and distribution of entomopathogenic fungi in natural and cultivated soils. | factors affecting the occurrence and distribution of entomopathogenic fungi in 244 soil samples collected from natural and cultivated areas in spain were studied using an integrated approach based on univariate and multivariate analyses. entomopathogenic fungi were isolated from 175 of the 244 (71.7%) soil samples, with only two species found, beauveria bassiana and metarhizium anisopliae. of the 244 soil samples, 104 yielded b. bassiana (42.6%), 18 yielded m. anisopliae (7.3%), and 53 soil samp ... | 2007 | 17766099 |
| cytotoxic and antihaptotactic beauvericin analogues from precursor-directed biosynthesis with the insect pathogen beauveria bassiana atcc 7159. | precursor-directed biosynthesis was used to produce analogues of the cyclic depsipeptide mycotoxin beauvericin (1) using the filamentous fungus beauveria bassiana atcc 7159. feeding 30 analogues of d-2-hydroxyisovalerate and l-phenylalanine, the natural 2-hydroxycarboxylic acid and amino acid precursors of beauvericin, led to the biosynthesis of novel beauvericins. six of these were isolated and characterized, and their cytotoxicity and directional cell migration (haptotaxis) inhibitory activity ... | 2007 | 17803266 |
| enhanced efficacy of beauveria bassiana for red flour beetle with reduced moisture. | red flour beetle, tribolium castaneum (herbst), is a major pest of stored and processed grains that is tolerant of beauveria bassiana (balsamo) vuillemin under most conditions. laboratory assays demonstrated that desiccating conditions improved the efficacy of the fungus. for t. castaneum larvae exposed to b. bassiana at different vapor pressure deficits (vpds), the lc50 potency ratios were 2.3 for 2.42 kpa and 3.9 for 3.31 kpa compared with 1.06 kpa. there were significant effects of moisture o ... | 2007 | 17849853 |
| screening and secretomic analysis of enthomopatogenic beauveria bassiana isolates in response to cowpea weevil (callosobruchus maculatus) exoskeleton. | the production of cowpea (vigna unguiculata), an important self-sustained crop in latin america and africa, is severely affected by damage by the cowpea weevil callosobruchus maculatus. the presence of a single larva in stored seeds can lead to losses of almost 40%. control of c. maculatus currently relies on the inefficient use of chemical insecticides and post-harvest treatments. the use of entomopathogenic fungus became a reliable alternative for coleopteran pest control and has been extensiv ... | 2007 | 17350346 |
| investigations into the taxonomy of the mushroom pathogen verticillium fungicola and its relatives based on sequence analysis of nitrate reductase and its regions. | the full sequence of the nitrate reductase gene was obtained from a type isolate of verticilliumfungicola var. fungicola and used for phylogenetic analysis against other ascomycete fungi. sequencing obtained 2749 bp of coding region, 668 bp of 5' flanking sequence and 731 bp of 3' flanking sequence. in silico analysis indicated that the coding region contains a single intron and translates into an 893 amino acid protein, with blast analysis identifying five conserved nitrate reductase domains wi ... | 2007 | 18297878 |
| biocontrol of almond bark beetle (scolytus amygdali geurin-meneville, coleoptera: scolytidae) using beauveria bassiana (bals.) vuill. (deuteromycotina: hyphomycetes). | to formulate the entomopathogenic fungus beauveria bassiana in invert emulsion, then apply it against adults of almond bark beetle (scolytus amygdali) under laboratory and field conditions. | 2007 | 17953551 |
| biosynthesis of the 2-pyridone tenellin in the insect pathogenic fungus beauveria bassiana. | genomic dna from the insect pathogenic fungus beauveria bassiana was used as a template in a pcr with degenerate primers designed to amplify a fragment of a c-methyl transferase (cmet) domain from a highly reduced fungal polyketide synthase (pks). the resulting 270-bp pcr product was homologous to other fungal pks cmet domains and was used as a probe to isolate a 7.3-kb fragment of genomic dna from a bamh1 library. further library probing and tail-pcr then gave a 21.9-kb contig that encoded a 12 ... | 2007 | 17216664 |
| means to mediating accumulation of hydrophobin-like proteins in the wall of beauveria bassiana conidia for improved tolerance to thermal stress. | 2007 | 18057822 | |
| [species diversity and seasonal change of entomogenous fungi in langya mountains nature reserve]. | 672 specimens of entomogenous fungi belonging to 20 species, 8 genera and 4 families were collected from 20 sampling quadrates in the langya mountains nature reserve of east anhui. the dominant species were beauveria bassiana, paecilomyces farinosus, p. cateinannulatus, b. brongniartii and p. fumosoroseus, and b. bassiana was most dominant, with the relative abundance of 73.8%. the entomogenous fungi in the reserve were high in amount but low in diversity. the amount of isolates and the abundanc ... | 2007 | 18062316 |
| effect of nutrition on growth and virulence of the entomopathogenic fungus beauveria bassiana. | three isolates of the entomopathogen beauveria bassiana along with one strain of metarhizium anisopliae were cultured on seven media with different carbon/nitrogen (c/n) ratios. the effect of nutrition on virulence of the isolates was evaluated via measurement of colony growth, spore yield, germination speed, conidial c/n ratio and pr1 (a serine protease) activity. 'osmotic stress' medium produced the lowest colony growth with low numbers of conidia in all isolates. however, these conidia showed ... | 2007 | 17319877 |
| [development of the fungi metarhizium anisopliae (metschnikoff, 1879) sorokin, 1883 and beauveria bassiana (balsamo) vuillemin, 1912 on the ctenophephalides felis felis (bouché, 1835)]. | the flea ctenocephalides felis felis is a parasite that causes allergic dermatitis and also may transmit etiologic agents to domestic animals and humans. this study investigated by scanning electron microscopy the development of entomopathogenic fungi on flea cuticle. fleas were exposed to conidia (10(8) ml(-1)) of metarhizium anisopliae (isolate 959) or beauveria bassiana (isolate 986). following standard protocols for electron microscopy, the specimens were prepared 2, 15, 26 and 96 h after in ... | 2007 | 18078609 |
| mycobiota of the date palm phylloplane: description and interactions. | we have analysed the mycobiota of date palm (phoenix dactylifera, l.) leaves using several techniques. profusely sporulating fungi (penicillium spp. and cladosporium spp.) developed when plating leaf fragments and leaf washings. fusarium oxysporum, was particularly abundant in leaves infested with the red scale insect phoenicococcus marlatti cockerell, 1899, but an undescribed lecanicillium cf. psalliotae was also found. dual and overlay cultures showed interactions between palm pathogens, entom ... | 2007 | 18095764 |
| comparisons of ecorational and chemical insecticides against crucifer flea beetle (coleoptera: chrysomelidae) on canola. | studies were done comparing the insecticides spintor (spinosad), botanigard (beauveria bassiana), neemix (azadirachtin), and surround (kaolin, a clay) with conventional chemical insecticides capture (bifenthrin) and helix xtra (thiamethoxam), all applied at seven rates in a 7-d assay to assess their impact on adult crucifer flea beetle, phyllotreta cruciferae (goeze) (coleoptera: chrysomelidae). lethal time (lt) required for 25, 50, and 75% mortality (lt25, lt50, and lt75) and relative potencies ... | 2007 | 17849871 |
| variability in tolerance to uv-b radiation among beauveria spp. isolates. | solar radiation, particularly the uv-b component, negatively affects survival of entomopathogenic fungi in the field. in an effort to identify beauveria spp. isolates with promise for use in biological control settings with high insolation, we examined 53 beauveria bassiana isolates, 7 isolates of 4 other beauveria spp. and engyodontium albus (=beauveria alba). the origins of these fungi varied widely as to host/substrate and country, but approximately 30% of these isolates were b. bassiana from ... | 2007 | 17610892 |
| [pathogenicity of several fungal species on spodoptera litura]. | the virulence test of five species of entomogenous fungi beauveria brongniartii, beauveria bassiana, paecilomyces fumosoroseus, metarhizium anisopliae and nomuraea rileyi to spodoptera litura larvae showed that b. brongniartii and n. rileyi had evident pathogenic effects on s. litura, with the lt50 value to s. litura 2nd instars being 2.95 and 4.10 days, and the corrected accumulative mortality of the instars being 100% and 95.2%, respectively. the virulence of b. brongniartii and n. rileyi to t ... | 2007 | 17615897 |
| phage display cdna cloning and expression analysis of hydrophobins from the entomopathogenic fungus beauveria (cordyceps) bassiana. | hydrophobins are small amphipathic proteins that function in a broad range of growth and developmental processes in fungi. they are involved in the formation of aerial structures, the attachment of fungal cells to surfaces, and act in signalling in response to surface cues and pathogenesis. beauveria bassiana is an important entomopathogenic fungus used as an arthropod biological control agent. to examine the feasibility of using phage display technology to clone cdnas encoding hydrophobins, bio ... | 2007 | 17906142 |
| phage display cdna cloning and expression analysis of hydrophobins from the entomopathogenic fungus beauveria (cordyceps) bassiana. | hydrophobins are small amphipathic proteins that function in a broad range of growth and developmental processes in fungi. they are involved in the formation of aerial structures, the attachment of fungal cells to surfaces, and act in signalling in response to surface cues and pathogenesis. beauveria bassiana is an important entomopathogenic fungus used as an arthropod biological control agent. to examine the feasibility of using phage display technology to clone cdnas encoding hydrophobins, bio ... | 2007 | 17906142 |
| surface characteristics of the entomopathogenic fungus beauveria (cordyceps) bassiana. | marked differences in surface characteristics were observed among three types of single-cell propagules produced by the entomopathogenic fungus beauveria bassiana. atomic force microscopy (afm) revealed the presence of bundles or fascicles in aerial conidia absent from in vitro blastospores and submerged conidia. contact angle measurements using polar and apolar test liquids placed on cell layers were used to calculate surface tension values and the free energies of interaction of the cell types ... | 2007 | 17906143 |
| surface characteristics of the entomopathogenic fungus beauveria (cordyceps) bassiana. | marked differences in surface characteristics were observed among three types of single-cell propagules produced by the entomopathogenic fungus beauveria bassiana. atomic force microscopy (afm) revealed the presence of bundles or fascicles in aerial conidia absent from in vitro blastospores and submerged conidia. contact angle measurements using polar and apolar test liquids placed on cell layers were used to calculate surface tension values and the free energies of interaction of the cell types ... | 2007 | 17906143 |
| ovicidal activity of entomopathogenic hyphomycetes on aedes aegypti (diptera: culicidae) under laboratory conditions. | the ovicidal activity of 21 hyphomycete fungi species against aedes aegypti (l.) (diptera: culicidae) was tested. fungi with ovicidal activity developed on high numbers of eggs (> or =70%) during 25 d of exposure. a clear ovicidal activity with low values of hatch (1.3-40%) was observed after 25 d of incubation with isaria farinosa (holm: fries) fries, paecilomyces carneus (duché & heim) brown & smith, paecilomyces marquandii (massee) hughes, isaria fumosorosea (wize), metarhizium anisopliae (me ... | 2007 | 17915511 |
| the molecular diversity of different isolates of beauveria bassiana (bals.) vuill. as assessed using intermicrosatellites (issrs). | inter-microsatellite pcr (issr-pcr) markers were used to identify and to examine the genetic diversity of eleven beauveria bassiana isolates with different geographic origins. the variability and the phylogenetic relationships between the eleven strains were analyzed using 172 issr-pcr markers. a high level of polymorphism (near 80%) was found using these molecular markers. seven different isolates showed exclusive bands, and issr primer 873 was able to distinguish between all the strains. the d ... | 2007 | 17192823 |
| [studies on purification and properties of antagonistic protein from bacteria ss02 of paenibacillus daejeonensis]. | the antifungal, anti-bacterical, anti-brine shrimp activities of sd22 isolated from paenibacillus daejeonensis bacteria ss02 were studied. the separation steps included ultracentrifugation, ultrafiltration and (nh4)2so4 fractional precipitation, further purification was performed by sephadexg-75 and deae-32 chromatography. its molecular weight determined by sds-page was 56.0 kd and its isoelectfic point was 6.4. sd22 was thermostable to some extent and stable to ultraviolet, but sensitive to som ... | 2007 | 17822044 |
| human exposure to airborne fungi from genera used as biocontrol agents in plant production. | the fungi trichoderma harzianum, t. polysporum, t. viride, paeciliomyces fumosoroseus, p. lilacinus, verticillium/lecanicillium lecanii, ulocladium oudemansii, u. atrum and beauveria bassiana are used or considered to be used for biocontrol of pests and plant diseases. human exposure to these fungi in environments where they may naturally occur or are used as biocontrol agents has not been directly investigated to date. this review aims to provide an overview of the current knowledge of human ex ... | 2007 | 17655172 |
| broad-spectrum antimicrobial activity of the reactive compounds generated in vitro by manduca sexta phenoloxidase. | although quinone production and melanin formation are widely recognized as an integral part of the insect defense system, experimental evidence is lacking that the proteolytic activation of prophenoloxidase participates in the direct killing of invading microbes-active phenoloxidase generates quinones that polymerize to form melanin. here, we report the antimicrobial effect of reactive intermediates produced in phenoloxidase-catalyzed reactions. after being treated with manduca sexta phenoloxida ... | 2007 | 17681234 |
| expression of a beauveria bassiana chitinase (bbchit1) in escherichia coli and pichia pastoris. | beauveria bassiana chitinase (bbchit1) is an important cuticle degrading enzyme involved in pathogenesis of fungi against insect. to obtain enough active chitinase for performing in vitro functional analysis, bbchit1 gene was expressed in escherichia coli and pichia pastoris, respectively. the high-level production of recombinant bbchit1 was detected in e. coli expression system, however mainly located in inclusion bodies. refolding of solubilized inclusion body proteins was achieved by dialysis ... | 2007 | 17692532 |
| recalcitrant beauveria bassiana keratitis: confocal microscopy findings and treatment with posaconazole (noxafil). | to report the clinical, confocal microscopic, and histologic appearance of a case of beauveria bassiana keratitis and response to medical therapy. | 2007 | 17721308 |
| biochemistry of insect epicuticle degradation by entomopathogenic fungi. | the biochemical interaction between fungal pathogens and their insect host epicuticle was studied by examining fungal hydrocarbon degrading ability. as a contact insecticide, entomopathogenic fungi invade their host through the cuticle, covered by an outermost lipid layer mainly composed of highly stable, very long chain structures. strains of beauveria bassiana and metarhizium anisopliae (deuteromycotina: hyphomycetes), pathogenic both to the blood-sucking bug triatoma infestans (hemiptera: red ... | 2007 | 17052960 |
| biological control of rhipicephalus (boophilus) annulatus by different strains of metarhizium anisopliae, beauveria bassiana and lecanicillium psalliotae fungi. | virulence of 11 native strains of entomopathogenic fungi; metarhizium anisopliae (three strains), beauveria bassiana (six strains) and lecanicillium psalliotae (two strains) collected from different parts of iran, were studied against different developmental stages of rhipicephalus (boophilus) annulatus. after the exposure of ticks to the fungal strains in different concentrations (i.e. 10(3), 10(5), 10(7) conidia/ml), various parameters such as mortality rate and reproductive efficiency of engo ... | 2007 | 17186273 |
| antibacterial activity and in vitro anti-tumor activity of the extract of the larvae of the housefly (musca domestica). | one of the significant characteristics of traditional chinese medicine is the use of insects, other terrestrial arthropods and their products as drugs. in the present work, the extract of housefly (musca domestica) larvae was studied by an agar well diffusion assay and minimum bactericidal concentration (mbc) determination for detection of antimicrobial activity and by mtt assay method to test its in vitro anti-tumor activity. in our studies, the extract inhibited six tested bacterial pathogens ... | 2007 | 17227700 |
| germination polarity of beauveria bassiana conidia and its possible correlation with virulence. | three different germination types of conidia; unidirectional, bidirectional and multidirectional, were revealed through microscopic observations for eight beauveria bassiana isolates germinated on sabouraud dextrose agar. canonical correlation analysis indicated that there is a positive correlation between unidirectional germination and virulence against diamondback moth, plutella xylostella and the colorado potato beetle, leptinotarsa decemlineata. scanning electron microscopy revealed differen ... | 2007 | 17097103 |
| increased insect virulence in beauveria bassiana strains overexpressing an engineered chitinase. | entomopathogenic fungi are currently being used for the control of several insect pests as alternatives or supplements to chemical insecticides. improvements in virulence and speed of kill can be achieved by understanding the mechanisms of fungal pathogenesis and genetically modifying targeted genes, thus improving the commercial efficacy of these biocontrol agents. entomopathogenic fungi, such as beauveria bassiana, penetrate the insect cuticle utilizing a plethora of hydrolytic enzymes, includ ... | 2007 | 17085713 |
| a specific primed immune response in drosophila is dependent on phagocytes. | drosophila melanogaster, like other invertebrates, relies solely on its innate immune response to fight invading microbes; by definition, innate immunity lacks adaptive characteristics. however, we show here that priming drosophila with a sublethal dose of streptococcus pneumoniae protects against an otherwise-lethal second challenge of s. pneumoniae. this protective effect exhibits coarse specificity for s. pneumoniae and persists for the life of the fly. although not all microbial challenges i ... | 2007 | 17352533 |
| a tritrophic effect of host plant on susceptibility of western flower thrips to the entomopathogenic fungus beauveria bassiana. | adult female western flower thrips (frankliniella occidentalis) were exposed 12-24h to bean (phaseolus vulgaris) and impatiens (impatiens wallerana) leaf disks treated with beauveria bassiana conidia and then transferred to clean bean or impatiens at various times post-treatment. significantly greater levels of fungal infection were observed when thrips were treated on bean versus impatiens, but exposure to impatiens following treatment had no effect on fungal infection (percent mortality). this ... | 2007 | 17572438 |
| [efficiency of beauveria bassiana and metarhizium anisopliae formulations on amblyomma cajennense (fabricius, 1787) nymphae]. | amblyomma cajennense is a vector of several infectious diseases on mammals and became a serious problem in some localities in brazil. entomopathogenic fungi are very important biocontrol agents and could be a viable alternative for the control of this tick in permanent preserved areas. the aim of this study was to evaluated the mortality of tick nymphae treated with beauveria bassiana and metarhizium anisopliae formulations in laboratory conditions. non fed nymphae were inoculated with 2x10(7) a ... | 2007 | 17588319 |
| comparative evaluation and economic potential of ecorational versus chemical insecticides for crucifer flea beetle (coleoptera: chrysomelidae) management in canola. | from 2001 to 2004, field studies were conducted to evaluate the effect of the ecorational insecticides spintor (spinosad), botanigard (beauveria bassiana), neemix (azadirachtin), and surround (kaolin) against crucifer flea beetle on canola, brassica napus l., at the cotyledon stage. the ecorational treatments were compared with a standard foliar chemical insecticide, capture (bifenthrin), and the chemical seed treatment insecticide helix xtra (thiamethoxam). this study indicated that flea beetle ... | 2007 | 17598529 |
| horizontal transmission of beauveria bassiana in anastrepha ludens (diptera: tephritidae) under laboratory and field cage conditions. | the virulence of two products of the fungus beauveria bassiana (lcpp and bassianil) on adult anastrepha ludens (loew) (diptera: tephritidae) and their effect on the mating performance of infected males was evaluated in laboratory and field cage tests. the horizontal transmission capacity of the fungus during copulation or attempted copulation also was quantified using inoculated males as well as the impact of infection on female fecundity and longevity. both fungal products were found to be high ... | 2007 | 17461049 |
| current status and prospects on microbial control in japan. | historically in japan, studies on the diseases of the silkworm, bombyx mori, as a factor affecting the well-being of the silk industry, have dominated insect pathology. however, work by hidaka in 1933 demonstrated the possibility of controlling the pine moth, dendrolimus spectabilis, with the fungus beauveria bassiana and since then, various attempts have been made to develop a method to control insect pests using insect pathogens. the cypovirus product, matsukemin, was the first microbial contr ... | 2007 | 17462666 |
| nonribosomal peptide synthesis in aspergillus fumigatus and other fungi. | in fungi, nonribosomal peptide synthetases (nrp synthetases) are large multi-functional enzymes containing adenylation, thiolation (or peptidyl carrier protein, pcp) and condensation domains. these enzymes are often encoded within gene clusters. multiple nrp synthetase orfs have also been identified in fungi (14 in aspergillus fumigatus). leaa, a methyltransferase, is involved in secondary metabolite gene cluster regulation in aspergillus spp. the nrp synthetases glip and ftma respectively direc ... | 2007 | 17464044 |
| selection of entomopathogenic fungi for use in combination with sub-lethal doses of imidacloprid: perspectives for the control of the leaf-cutting ant atta sexdens rubropilosa forel (hymenoptera: formicidae). | in the first part of this study, four isolates of the fungus beauveria bassiana (bals.) vuillemin (lpp1, lpp2, cg05 and cg24) and one isolate of metarhizium anisopliae (metsch.) sorokin (cg46) were tested against adult foragers of atta sexdens rubropilosa. ants were allowed to walk on filter paper discs, inside petri dishes, previously impregnated with 1 ml of a conidia suspension (2 x 10(7) conidia ml(-1)), maintained at 80% rh and 26 degrees c for 24 h and subsequently, transferred to sterile ... | 2007 | 17404893 |
| maturation feeding and transmission of bursaphelenchus xylophilus (nematoda: parasitaphelenchidae) by monochamus alternatus (coleoptera: cerambycidae) inoculated with beauveria bassiana (deuteromycotina: hyphomycetes). | we examined the amount of maturation feeding and transmission of pinewood nematodes, bursaphelenchus xylophilus (steiner et buhrer) nickle (nematoda: parasitaphelenchidae), to healthy pine (pinus spp.) trees by pine sawyer monochamus alternatus hope (coleoptera: cerambycidae) adults infected with beauveria bassiana (balsamo) vuill. (deuteromycotina: hyphomycetes). inoculated beetles fed less than noninoculated beetles, probably because feeding by inoculated beetles began to decrease at about 4 d ... | 2007 | 17370808 |
| volatile organic compounds released by the entomopathogenic fungus beauveria bassiana. | the composition of volatile organic compounds (voc) released by the entomopathogenic fungus beauveria bassiana (hyphomycete: deuteromycotina) utilizing two different carbon sources was investigated. analyses were performed by solid-phase microextraction (spme) coupled to capillary gas chromatography (cgc) and cgc-mass spectrometry (ms). major components in glucose-grown cultures were diisopropyl naphthalenes, ethanol, and sesquiterpenes. alkane-grown fungal voc switched to a fingerprint with pre ... | 2008 | 16733086 |
| implication of a regulator of g protein signalling (bbrgs1) in conidiation and conidial thermotolerance of the insect pathogenic fungus beauveria bassiana. | beauveria bassiana is an insect pathogenic fungus widely used as a biocontrol agent to infect and control insect pests. the conidium initiates pathogenesis and mediates disease transmission, however, little is known about genetic elements that control conidiation. here, the cloning and characterization of a regulatory g protein-signalling (rgs) gene bbrgs1 from b. bassiana is reported. phylogenetic analysis showed that bbrgs1 was orthologous to the rgs protein, flba from aspergillus nidulans. th ... | 2008 | 18201190 |
| effect of some biorational insecticides on spodoptera eridania in organic cabbage. | to reduce pest attack, several biorational products are allowed for use on organic vegetables in brazil. this study investigated eight biorational products applied singly or in combination against spodoptera eridania cramer in field plots of cabbage intercropped with coriander. the treatments were applied once a week over a 5 week period, beginning 34 days after transplanting. the evaluations consisted of counting the larvae of s. eridania on the day before and 7 and 21 days after spraying. the ... | 2008 | 18300205 |
| protected by fumigants: beetle perfumes in antimicrobial defense. | beetles share with other eukaryotes an innate immune system that mediates endogenous defense against pathogens. in addition, larvae of some taxa produce fluid exocrine secretions that contain antimicrobial compounds. in this paper, we provide evidence that larvae of the brassy willow leaf beetle phratora vitellinae constitutively release volatile glandular secretions that combat pathogens in their microenvironment. we identified salicylaldehyde as the major component of their enveloping perfume ... | 2008 | 18236110 |
| authentic heterologous expression of the tenellin iterative polyketide synthase nonribosomal peptide synthetase requires coexpression with an enoyl reductase. | the tens gene encoding tenellin synthetase (tens), a 4239-residue polyketide synthase nonribosomal-peptide synthetase (pks-nrps) from beauveria bassiana, was expressed in aspergillus oryzae m-2-3. this led to the production of three new compounds, identified as acyl tetramic acids, and numerous minor metabolites. consideration of the structures of these compounds indicates that the putative c-terminal thiolester reductase (r) domain does not act as a reductase, but appears to act as a dieckmann ... | 2008 | 18266306 |
| new feather-degrading filamentous fungi. | among 106 filamentous fungi isolated from poultry farm waste, 13 species belonging to seven genera (aspergillus, acremonium, alternaria, beauvaria, curvularia, paecilomyces, and penicillium) were able to grow and produce keratinase in stationary cultures using poultry feather powder as the only substrate. the four most efficient keratinase producers were selected for a comparative study of keratinase production in submerged and stationary conditions. the highest keratinolytic activities were pro ... | 2008 | 17899245 |
| natural occurrence of beauveria bassiana in hypothenemus hampei (coleoptera: curculionidae) populations in unsprayed coffee fields. | three unsprayed coffee farms (farm 1, 2 and 3) were studied for the natural occurrence of the insect pathogenic fungus beauveria bassiana in hypothenemus hampei populations throughout the rainy season of 2004 (july-november) and 2005 (july-december). b. bassiana infections were found during most sampling dates in both years, on all three farms. the b. bassiana infection levels were higher in 2005 than in 2004 with mean prevalence of 12.1% and 2.7%, respectively. no consistent significant differe ... | 2008 | 17854825 |
| late stage oxidations during the biosynthesis of the 2-pyridone tenellin in the entomopathogenic fungus beauveria bassiana. | late stage oxidations during the biosynthesis of the 2-pyridone tenellin in the insect pathogenic fungus beauveria bassiana were investigated by a combination of gene knockout, antisense rna, and gene coexpression studies. open reading frames (orf) 3 and 4 of the tenellin biosynthetic gene cluster were previously shown to encode a trans-acting enoyl reductase and a hybrid polyketide synthase nonribosomal peptide synthetase (pks-nrps), respectively, which together synthesize the acyltetramic acid ... | 2008 | 19067514 |
| selection of beauveria bassiana isolates to control alphitobius diaperinus. | this paper presents results on isolates of the entomopathogenic fungus beauveria bassiana for alphitobius diaperinus (coleoptera: tenebrionidae) control. of the 30 isolates tested, four (cg 71, cg 152, unioeste 4, and unioeste 40) resulted in mortality rates >or= 40% within 10 days. these mortality rates could be considered high because of the resistance of these species to b. bassiana. tests were conducted using these isolates to estimate lc(50), mortality rate over time, vegetative growth, and ... | 2008 | 17869265 |
| fungal formulations to control rhipicephalus sanguineus engorged females. | entomopathogenic fungi are promising alternatives to chemical acaricides in controlling tick populations; however, biological formulations are required to improve conidial performance of these pathogens in the field. this study evaluated the effect of in vitro treatment of rhipicephalus sanguineus with conidial formulations of beauveria bassiana (bb) or metarhizium anisopliae (ma). conidia were formulated (at 10(8) conidia ml(-1)) in (1) emulsifiable concentrate (ec), (2) polymerized cellulose g ... | 2008 | 19120220 |
| [influence of different drying temperatures for solid substrate after fermentation on conidia characteristics of the entomopathogenic fungus beauveria bassiana]. | this study was to evaluate the effect of drying temperature for solid substrate after fermentation on conidia characteristics of entomopathogenic fungus beauveria bassiana. | 2008 | 18837365 |
| glycosylation of xanthohumol by fungi. | a screening test on 29 microorganisms for transformation of xanthohumol led to the selection of twelve fungal strains. one of them, beauveria bassiana am278, converted xanthohumol into a glucosylated derivative. this product was identified as xanthohumol 4'-o-beta-d-4'''-methoxyglucopyranoside. | 2008 | 18811001 |
| microbial metabolism of biologically active secondary metabolites from nerium oleander l. | ursolic acid (1) and kaempferol (3) are two major constituents of the mediterranean plant nerium oleander l. microbial metabolism of (1) with aspergillus flavus (atcc 9170) resulted in the formation of 3-oxo-ursolic acid derivative, ursonic acid (2). on the other hand, cunninghamella blakesleeana (atcc 8688a) was able to convert (3) into kaempferol 3-o-beta-d-glucopyranoside (4) as well as the new natural product kaempferol 4'-sulfate (5). incubation of kaempferol with mucor ramannianus (atcc 96 ... | 2008 | 18758096 |
| gene expression of a novel defensin antimicrobial peptide in the silkworm, bombyx mori. | cdna encoding a novel defensin (bmdefensinb) was cloned from the fat body of the silkworm, bombyx mori, and gene expression was analyzed. bmdefensinb showed typical structural characteristics of invertebrate defensins. phylogenetic and bootstrap analyses indicated that it has no orthologs, whereas previously reported bmdefensina is the ortholog of spodoptera frugiperda (sf)spodoptericin. the bmdefensinb gene was expressed tissue-specifically in the fat body and was strongly activated by bacteria ... | 2008 | 18776686 |
| effect of temperature on virulence of beauveria bassiana and metarhizium anisopliae isolates to tetranychus evansi. | the virulence of three isolates of beauveria bassiana (bals.) vuill. and 23 isolates of metarhizium anisopliae (metschnik.) sorok. (ascomycota: hypocreales) against the tomato spider mite, tetranychus evansi baker and pritchard (acari: tetranychidae), was assessed in the laboratory. the effect of temperature on germination, radial growth and virulence of selected isolates (two isolates of b. bassiana and nine of m. anisopliae) on t. evansi was also investigated in the laboratory. all the fungal ... | 2008 | 18648993 |
| effects of bacillus thuringiensis toxin cry1ac and beauveria bassiana on asiatic corn borer (lepidoptera: crambidae). | in this study, interactions between cry1ac, a toxic crystal protein produced by bacillus thuringiensis (berliner), and beauveria bassiana on the mortality and survival of ostrinia furnacalis was evaluated in the laboratory. the results showed that cry1ac is toxic to o. furnacalis. not only were larval growth and development delayed, but pupation, pupal weight and adult emergency also decreased when larvae were fed on artificial diet containing purified cry1ac toxin. when third instars o. furnaca ... | 2008 | 18656480 |
| application timing and efficacy of alternatives for the insecticidal control of tipula paludosa meigen (diptera: tipulidae), a new invasive pest of turf in the northeastern united states. | two invasive crane flies, tipula paludosa meigen and tipula oleracea l. (diptera: tipulidae), were detected in new york state for the first time in 2004. both are damaging pests of turfgrass and other horticultural systems in north america where establishment has already been documented. to develop management recommendations for the northeast and define opportunities for preventive (autumn) and curative (spring) control, four insecticide trials targeting t. paludosa larvae were conducted over a ... | 2008 | 18416446 |
| cloning and expression of a gene encoding gallerimycin, a cysteine-rich antifungal peptide, from eri-silkworm, samia cynthia ricini. | a cdna clone encoding gallerimycin was isolated from larval fat body of immunized samia cynthia ricini and named as scr-gallerimycin. in naive larvae, no gene expression was detected, but strongly induced in fat body and hemocytes following immune challenge with bacteria or entomopathogenic fungus beauveria bassiana. strong expression of the gene was also induced by injection of peptidoglycan and zymosan, but very weakly by non-pathogenic fungus aspergillus oryzae. analysis of the sequence upstr ... | 2008 | 18436462 |
| beauveria bassiana: endophytic colonization and plant disease control. | seed application of beauveria bassiana 11-98 resulted in endophytic colonization of tomato and cotton seedlings and protection against plant pathogenic rhizoctonia solani and pythium myriotylum. both pathogens cause damping off of seedlings and root rot of older plants. the degree of disease control achieved depended upon the population density of b. bassiana conidia on seed. using standard plating techniques onto selective medium, endophytic 11-98 was recovered from surface-sterilized roots, st ... | 2008 | 18442830 |
| characterization of a highly active promoter, pbbgpd, in beauveria bassiana. | the promoter of glyceraldehyde-3-phosphate dehydrogenase (gpd) gene from aspergillus nidulans (pgpda) is widely used to direct expression of target genes constitutively in fungi. however, in some species, a heterogeneous promoter is found to be of low efficiency. to obtain a high-efficiency promoter for transformation of beauveria bassiana, an entomopathogenic fungus widely used as an mycoinsecticide, a glyceraldehyde-3-phosphate dehydrogenase gene (bbgpd) promoter, was cloned and characterized. ... | 2008 | 18443858 |
| identification of novel genes associated with conidiation in beauveria bassiana with suppression subtractive hybridization. | the conidiation of the entomopathogenic fungus beauveria bassiana (hyphomycete) is a complex process that involves the stage- and cell-type-specific expression of hundreds of genes. the suppression subtractive hybridization method was used to target genes involved in conidiation. seventeen genes were cloned that potentially were involved in conidia formation. six of them demonstrated differential expression between conidial and vegetative cultures. sequence analysis showed three cdna fragments h ... | 2008 | 18488350 |
| sprays of emulsifiable beauveria bassiana formulation are ovicidal towards tetranychus urticae (acari: tetranychidae) at various regimes of temperature and humidity. | aerial conidia of beauveria bassiana in an emulsifiable formulation germinated by >95% after 24 h exposure to the regimes of 20, 25 and 30 degrees c with 51%, 74% and 95% rh. ovicidal activities of the formulation towards two-spotted spider mite, tetranychus urticae, were assayed at the concentrations of 0, 18, 160 and 693 conidia mm(-2) sprayed separately onto fava bean leaves including 39 (25-76) eggs per capita. all the sprayed eggs on the leaves were directly exposed to the different regimes ... | 2008 | 18584129 |
| increased pathogenicity against coffee berry borer, hypothenemus hampei (coleoptera: curculionidae) by metarhizium anisopliae expressing the scorpion toxin (aait) gene. | coffee berry borer (cbb) is the worlds most devastating coffee pest causing an estimated us$500 million worth of losses annually through damage and control costs. beauveria bassiana and metarhizium anisopliae have been employed to control this pest but their low virulence (slow kill and large inoculums) is an important factor constraining their use. m. anisopliae (aait-ma549) has been modified to express the scorpion toxin (aait) in insect hemolymph and this greatly increased pathogenicity again ... | 2008 | 18597773 |
| microbial metabolism part 9. structure and antioxidant significance of the metabolites of 5,7-dihydroxyflavone (chrysin), and 5- and 6-hydroxyflavones. | 5,7-dihydroxyflavone (chrysin) (1) when fermented with fungal cultures, aspergillus alliaceous (atcc 10060), beauveria bassiana (atcc 13144) and absidia glauco (atcc 22752) gave mainly 4'-hydroxychrysin (4), chrysin 7-o-beta-d-4-o-methylglucopyranoside (5) and chrysin 7-sulfate (6), respectively. mucore ramannianus (atcc 9628), however, transformed chrysin into six metabolites: 4'-hydroxy-3'-methoxychrysin (chrysoeriol) (7), 4'-hydroxychrysin (apigenin) (4) 3',4'-dihydroxychrysin (luteolin) (8), ... | 2008 | 18379084 |
| assessment of the suitability of tinopal as an enhancing adjuvant in formulations of the insect pathogenic fungus beauveria bassiana (bals.) vuillemin. | biopesticides based on beauveria bassiana (bals.) vuillemin hold great promise for the management of a wide range of insect pests. the conidia in the biopesticide formulation require an adjuvant to protect them from photoinactivation by sunlight. the suitability of tinopal, an optical brightener used as sunscreen for baculovirus formulations, for use with b. bassiana was assessed. the aim was to study the effect of tinopal on the growth and photoprotection of b. bassiana, and its effect on the s ... | 2008 | 18383501 |
| production and regulation of cuticle-degrading proteases from beauveria bassiana in the presence of rhammatocerus schistocercoides cuticle. | extracellular proteases have been shown to be virulence factors in fungal pathogenicity toward insects. we examined the production of extracellular proteases, subtilisin-like activity (pr1) and trypsin-like activity (pr2), by beauveria bassiana cg425, which is a fungus of interest for control of the grasshopper rhammatocerus schistocercoides. to access the role of these proteases during infection of r. schistocercoides, we analyzed their secretion during fungus growth either in nitrate-medium or ... | 2008 | 18071791 |
| addition of exogenous carbon and nitrogen sources to aphid exuviae modulates synthesis of proteases and chitinase by germinating conidia of beauveria bassiana. | secretion of catabolic extracellular enzymes (ece) is the hallmark of the infection of insects through the cuticle by entomopathogenic fungi (epf). in this paper, we show that germinating conidia of beauveria bassiana (bb) regulate the synthesis of ece through a multiple control mode during the initial stages of germination. we tested bb conidial growth on aphid exuviae with or without supplementation of additional carbon and/or nitrogen (c/n) compounds. to understand the interrelation between c ... | 2008 | 18286267 |
| eco-friendly management of hadda beetle using beauveria bassiana in brinjal. | brinjal (solanum melongena l.) is one among the vegetables grown in jaffna peninsula of sri lanka. it has been extensively cultivated throughout the country due to its demand among the consumers. the productivity of brinjal depends on the intensity of the attack of pests throughout the year. among the pests hadda beetle, epilachna vigintioctopunctata (coleoptera: coccinellidae) emerged as the key pest and caused serious damage on the foliage. this damage affected the flowering and fruiting abili ... | 2008 | 19226800 |
| comparison of application methods for suppressing the pecan weevil (coleoptera: curculionidae) with beauveria bassiana under field conditions. | the pecan weevil, curculio caryae (horn), is a key pest of pecans. the entomopathogenic fungus beauveria bassiana (balsamo) vuillemin is pathogenic to c. caryae. one approach to managing c. caryae may be application of b. bassiana directed toward adult weevils as they emerge from the soil to attack nuts in the tree canopy. our objective was to compare different application methods for suppression of c. caryae adults. treatments included direct application of b. bassiana (gha strain) to soil unde ... | 2008 | 18348807 |
| molecular characterization of isolates of beauveria bassiana obtained from overwintering and summer populations of sunn pest (eurygaster integriceps). | to examine whether isolates of the entomopathogenic fungus beauveria bassiana are more closely associated to their summer hosts compared with overwintering hosts, with recently developed molecular tools based on mitochondrial regions. | 2008 | 18290810 |
| insecticidal evaluation of beauveria bassiana engineered to express a scorpion neurotoxin and a cuticle degrading protease. | to improve the insecticidal efficacy of the entomopathogen beauveria bassiana, the fungus was genetically modified with an insect-specific scorpion neurotoxin aait and an insect cuticle degrading protease pr1a from another insect pathogen (metarhizium anisopliae). the wild-type and the transformants were bioassayed against the larvae of masson's pine caterpillar dendrolimus punctatus and the wax moth galleria mellonella. in comparison to the wild-type strain, engineered isolates took fewer spore ... | 2008 | 18800183 |
| microbial metabolism of 1-aminoanthracene by beauveria bassiana. | the carcinogen and mutagen, 1-aminoanthracene, was efficiently metabolized by the fungal strain beauveria bassiana atcc 7159 to yield three new metabolites identified as 1-acetamido-5-[(4'-o-methyl-beta-d-glucopyranosyl)oxy]anthracene, 1-acetamido-8-[(4'-o-methyl-beta-d-glucopyranosyl)oxy]anthraquinone, and 1-acetamido-6-[(4'-o-methyl-beta-d-glucopyranosyl)oxy]anthraquinone, together with 1-acetamidoanthracene and 1-acetamidoanthraquinone. formation of these metabolites suggests that the metabol ... | 2008 | 18378148 |
| whey for mass production of beauveria bassiana and metarhizium anisopliae. | spore production of beauveria bassiana and metarhizium anisopliae was studied in a novel whey-based culture media. spore yield and viability were determined for two b. bassiana (gha-726 and ca-603) and two m. anisopliae (ca-1 and imi 330189) isolates following production in three whey-based systems: solid, liquid, and a diphasic production system. our study indicated that whey permeate can be used effectively for production of spores of entomopathogenic fungi. however, spore yield and viability ... | 2008 | 18396025 |
| an improved method for beauveria bassiana transformation using phosphinothricin acetyltransferase and green fluorescent protein fusion gene as a selectable and visible marker. | an improved transformation method for the biocontrol agent, beauveria bassiana, was developed. for convenience of transformation selection and detection, the coding regions of the genes for phosphinothricin acetyltransferase and green fluorescent protein were fused and an expression vector, pbft, carrying this fusion was constructed. under optimum conditions, over 60 transformants microg(-1) plasmid dna were obtained. b. bassiana conidia frozen 1 month at -80 degrees c were fully competent for t ... | 2008 | 18414799 |
| impact of two treatments of a formulation of beauveria bassiana (deuteromycota: hyphomycetes) conidia on varroa mites (acari: varroidae) and on honeybee (hymenoptera: apidae) colony health. | bee colonies in southern france were treated with conidia (asexual spores) from two strains of beauveria bassiana, an entomopathogenic fungus. one strain was commercial (gha) and the other had been isolated from varroa mites in the region (bb05002). objectives were to evaluate treatment effect on colony weight, adult bee mass, capped brood, and on varroa fall onto sticky boards. treatments included conidia formulated with either carnauba or candelilla wax powder, candelilla wax powder alone, or ... | 2008 | 18506583 |
| virulence of hypocreales fungi to pecan aphids (hemiptera: aphididae) in the laboratory. | there is need for efficacious biocontrol agents for aphids in commercial orchards. as a preliminary step to this end we determined the virulence of several hypocreales fungi to pecan aphids. in the first experiment we tested the virulence of isaria fumosorosea (arsef 3581) blastospores to three pecan aphids monellia caryella, melanocallis caryaefoliae, and monelliopsis pecanis under laboratory conditions. rates of 1x10(7) or 1x10(8) spores per ml were applied in 2 ml via a spray tower to 90 mm p ... | 2008 | 18675272 |
| biosynthesis of the cyclooligomer depsipeptide beauvericin, a virulence factor of the entomopathogenic fungus beauveria bassiana. | beauvericin, a cyclohexadepsipeptide ionophore from the entomopathogen beauveria bassiana, shows antibiotic, antifungal, insecticidal, and cancer cell antiproliferative and antihaptotactic (cell motility inhibitory) activity in vitro. the bbbeas gene encoding the bbbeas nonribosomal peptide synthetase was isolated from b. bassiana and confirmed to be responsible for beauvericin biosynthesis by targeted disruption. bbbeas utilizes d-2-hydroxyisovalerate (d-hiv) and l-phenylalanine (phe) for the i ... | 2008 | 18804027 |
| pathogenicity of endophytic entomopathogenic fungi to ornithodoros erraticus and ornithodoros moubata (acari: argasidae). | the argasid ticks o. erraticus and o. moubata are of great medical and veterinary importance because they are vectors of the african swine fever virus and several species of human relapsing fever borreliae. biocontrol of these ticks using entomopathogenic fungi has not been previously reported. we examined the pathogenicity to different developmental stages of these two argasids of six strains of the fungal species beauveria bassiana (strains bb1764 and bb2157), lecanicillium lecanii (strains ll ... | 2008 | 18976863 |
| selection for resistance to a fungal pathogen in drosophila melanogaster. | an artificial selection experiment designed to explore the evolution of resistance to a fungal pathogen, beauveria bassiana, in drosophila melanogaster is reported here. the experiment was designed to test whether there is sufficient additive genetic variation in this trait for increased resistance to evolve, and, if so, whether there are correlated responses that might represent a cost to defence. after 15 generations of selection, flies from selected lines did not have higher overall fitness a ... | 2008 | 18301441 |
| virulence of metarhizium anisopliae and beauveria bassiana to ctenocephalides felis felis. | ctenocephalides felis felis is a flea species that parasitizes dogs and cats. the current study verified the in vitro virulence of the entomopathogenic fungi metarhizium anisopliae and beauveria bassiana to eggs and adults of c. felis felis. the fungal isolates were cultivated on rice grains in plastic bags. conidial suspensions were then prepared by immersing the grains in tween 80 aqueous solution (0.01%). eggs and adults of c. felis felis were obtained from a laboratory colony. experiments we ... | 2008 | 19120257 |
| isolation and characterization of nucleotide excision repair deficient mutants of the entomopathogenic fungus, beauveria bassiana. | to better understand dna repair in the entomopathogenic fungus beauveria bassiana, three ultraviolet (uv) light sensitive mutants were isolated and characterized to be deficient in nucleotide excision repair (ner). the uv sensitive mutants were scored by comparison to survival of the parental isolate, gk2016, after 36 j/m(2) uv-c irradiation. at this dose, conidial survival of gk2016 was 98% and the mutants lc75, lc194, and lc85 had survival values of 63%, 45%, and 31%, respectively. an immunolo ... | 2008 | 18005981 |
| the characteristics of keratomycosis by beauveria bassiana and its successful treatment with antimycotic agents. | clinical findings and treatment of keratomycosis caused by beauveria bassiana, an entomopathogenic filamentous fungus, are described for an 80-year-old woman, who was referred to the hospital for ocular pain and redness on the 9th day after an ocular injury caused by the frame of her glasses. she had a long history of recurrent diabetic iritis and continuously used topical antibiotics and corticosteroids. at her first visit, a slit-lamp examination indicated a corneal ulcer confined within the s ... | 2008 | 19668774 |
| selection of filamentous fungi of the beauveria genus able to metabolize quercetin like mammalian cells. | microbial biotransformations constitute an important alternative as models for drug metabolism study in mammalians and have been used for the industrial synthesis of chemicals with pharmaceutical purposes. several microorganisms with unique biotransformation ability have been found by intensive screening and put in commercial applications. ten isolates of beauveria sp genus filamentous fungi, isolated from soil in the central brazil, and beauveria bassiana atcc 7159 were evaluated for their capa ... | 2008 | 24031237 |
| cuticle-degrading proteases produced by the entomopathogenic fungus beauveria bassiana in the presence of coffee berry borer cuticle. | a brazilian isolate of beauveria bassiana (cg425) that shows high virulence against the coffee berry borer (cbb) was examined for the production of subtilisin-like (pr1) and trypsin-like (pr2) cuticle-degrading proteases. fungal growth was either in nitrate-medium or in cbb cuticle-containing medium under both buffered and unbuffered conditions. in unbuffered medium supplemented with cuticle, the ph of cultures dropped and pr1 and pr2 activities were detected in high amounts only at a ph of 5.5 ... | 2008 | 24031220 |
| production of blastospore of entomopathogenic beauveria bassiana in a submerged batch culture. | the principal objective of this study was to determine the optimal liquid culture conditions in shake flasks for maximal sporulation of beauveria bassiana. the optimal initial ph for the spore production of b. bassiana using potato dextrose broth was 5.2. the screening in shake flasks of carbon and nitrogen sources resulted in the identification of an optimal medium based on 3% sucrose and 1% casamino acid, with a c : n ratio of 22 : 4. using this medium, a production level of 5.65 × 10(7) spore ... | 2009 | 23983537 |
| laboratory study on biological control of ticks (acari: ixodidae) by entomopathogenic indigenous fungi (beauveria bassiana). | chemical control method using different acaricides as spray, dipping solution or pour-on is routinely used for controlling ticks. biological control agents are favorable due to their safety for animals and environment. entomopathogenic fungi such as beauveria bassiana are well known for controlling ticks. in this study, two iranian indigenous strains of b. bassiana (b. bassiana 5197 and b. bassiana evin) were selected and grown on specific media. the pathogenic effects of these strains were eval ... | 2009 | 22808380 |
| a beauvericin hot spot in the genus isaria. | beauvericin is a naturally occurring cyclohexadepsipeptide originally described from beauveria bassiana but also reported from several fusarium species as well as members of the genus isaria. twenty-six isolates of isaria species and its cordyceps teleomorph, and ten taxonomically close strains including beauveria, nomuraea and paecilomyces species were sequenced and tested for beauvericin production. trees using its rdna and beta-tubulin sequence data were constructed and used to infer the phyl ... | 2009 | 19766720 |
| [susceptibility of the parasitoid phymastichus coffea lasalle (hymenoptera: eulophidae) to beauveria bassiana under laboratory conditions]. | the coffee berry borer, hypothenemus hampei (ferrari) (coleoptera: curculionidae), is the most important coffee pest worldwide. beauveria bassiana is a generalist entomopathogenic fungus widely used by coffee farmers to control this pest and phymastichus coffea lasalle (hymenoptera: eulophidae) is an african endoparasitoid of h. hampei adults, recently imported to several latin american and caribbean countries to aid in the coffee berry borer control. the objective of this study was to determine ... | 2009 | 19943017 |
| mitogen-activated protein kinase hog1 in the entomopathogenic fungus beauveria bassiana regulates environmental stress responses and virulence to insects. | beauveria bassiana is an economically important insect-pathogenic fungus which is widely used as a biocontrol agent to control a variety of insect pests. however, its insecticide efficacy in the field is often influenced by adverse environmental factors. thus, understanding the genetic regulatory processes involved in the response to environmental stress would facilitate engineering and production of a more efficient biocontrol agent. here, a mitogen-activated protein kinase (mapk)-encoding gene ... | 2009 | 19363067 |
| soil application of beauveria bassiana to control ceratitis capitata in semi field conditions. | the mediterranean fruit fly ceratitis capitata (wiedemann) is a highly polyphagous pest of economic importance cultures in syria, as in many other parts of the world. the potential of the entomopathogenic fungus beauveria bassiona bals (vuil.) strain 412 against adults of mediterranean fruit fly c. capitata was evaluated in semi field conditions during the summer. soil (5-7 cm high) was filled into plastic container (27 cm x 32 cm). in one container 75 pupae, two days before emergency, were spre ... | 2009 | 20222591 |
| gene expression profiling during early response to injury and microbial challenges in the silkworm, bombyx mori. | to identify bombyx mori genes involved in the early response to injury and microbial challenge, we performed genome-wide gene expression-profiling experiments using oligonucleotide dna microarrays. of approximately 23,000 genes examined, 465 displayed changes in mrna expression levels. of these, 306 were induced and 159 were repressed in response to injury (injection with phosphate buffer saline) or challenges by gram-negative (serratia marcescens), gram-positive bacteria (staphylococcus aureus) ... | 2009 | 19557735 |
| lectin mapping reveals stage-specific display of surface carbohydrates in in vitro and haemolymph-derived cells of the entomopathogenic fungus beauveria bassiana. | the entomopathogenic fungus beauveria bassiana and its insect host target represent a model system with which to examine host-pathogen interactions. carbohydrate epitopes on the surfaces of fungal cells play diverse roles in processes that include adhesion, non-self recognition and immune invasion with respect to invertebrate hosts. b. bassiana produces a number of distinct cell types that include aerial conidia, submerged conidia, blastospores and haemolymph-derived cells termed in vivo blastos ... | 2009 | 19608611 |
| proteomic analysis of date palm (phoenix dactylifera l.) responses to endophytic colonization by entomopathogenic fungi. | the entomopathogenic fungi beauveria bassiana, lecanicillium dimorphum and l. cf. psalliotae can survive and colonize living palm tissue as endophytes. the molecular interaction between these biocontrol agent fungi and the date palm phoenix dactylifera l. was investigated using proteomic techniques. field date palms inoculated with these fungi were analyzed 15 and 30 days after inoculation in two independent bioassays. in vitro date palms were also inoculated with b. bassiana or l. cf. psalliota ... | 2009 | 19676091 |
| spore persistence and likelihood of aeroallergenicity of entomopathogenic fungi used for mosquito control. | entomopathogenic fungi, such as metarhizium anisopliae and beauveria bassiana, are being researched as alternatives to chemical adulticides to control mosquito vectors of malaria and dengue. two cited concerns of fungal control include conidial viability and risks fungal entomopathogens pose to human health. we measured spore viability of 10 fungal isolates over 26 weeks and found a range of persistence. three b. bassiana isolates maintained > or = 50% viability 14 weeks after application. no m. ... | 2009 | 19478264 |
| molecular phylogeny of asexual entomopathogenic fungi with special reference to beauveria bassiana and nomuraea rileyi. | the phylogenetic lineage, taxonomic affiliation and interrelationships of important asexual entomopathogenic fungal genera were studied using the sequences of partial regions of beta-tubulin and rrna genes. the species structures of beauveria bassiana and nomuraea rileyi were also investigated. a total of 147 fungal entries covering 94 species were analysed. phylogenetic analysis placed all the asexual entomopathogenic fungal species analysed, in the family clavicipitaceae of the order hypocreal ... | 2009 | 19631163 |