| polymerase chain reaction-restriction fragment length polymorphism of ribosomal internal transcribed spacer region analysis on polyacrylamide gel electrophoresis reveals two haplotypes coexisting in myzus persicae. | aphids are geographically and economically the most important group of phytophagous insects. they are responsible for various damage on cultivated plants. in our laboratory, we are interested in their ability to transmit phytoviruses such as rhabdovirus, cucumovirus, potyvirus, and caulimavirus which cause many crop diseases. the present work deals with the study of vectors as analyzed by polymerase chain reaction-restriction fragment length polymorphism (pcr-rflp) of internal transcribed spacer ... | 2002 | 11840522 |
| [predation on myzus persicae by propylaea japonica adults with different extents of starvation]. | the study showed that the functional response of predation on m. persicae by the female and male adults of p. japonica with different extents of starvation belonged to the type of holling ii. female adults had a larger attacking rate than male adults, but the predacious amount of m. persicae by female and male adult predators of different extent of starvation within 24 hrs had no significant difference. the predacious amount by female adult was larger than that of male. the significant differenc ... | 2000 | 11767536 |
| [influence of temperature and relative humidity on epizootiological features of zoophthora anhuiensis in myzus persicae colonies]. | the colony of green peach aphid, myzus persicae(sulzer), which was initiated with 3 pathogen-free apterae and another 3 ones inoculated with the conidia of the entomophthoraceous fungus, zoophthora anhuiensis(li) humber, was maintained on detached cabbage leaves at the regimes of 10-25 degrees c and 90-100% of relative humidity(rh), and allowed for free reproduction and fungal infection. based on 26 day observations, it was showed that the development of z. anhuiensis in the colony was rapid at ... | 2001 | 11758389 |
| inheritance and meiotic behaviour of a de novo chromosome fusion in the aphid myzus persicae (sulzer). | a de novo tandem fusion between autosomes 2 and 3 (a2+3), arising in the course of laboratory crosses of sexual morphs of two clones of the aphid myzus persicae, was stable through more than 180 generations of parthenogenetic (clonal) reproduction. studies of its inheritance through the sexual phase, and segregation from an amplified esterase marker gene, showed that crossing over occurred during oogenesis, but not in spermatogenesis, confirming previous cytological observations. only a small nu ... | 2000 | 11151679 |
| methylation and expression of amplified esterase genes in the aphid myzus persicae (sulzer). | most populations of the aphid myzus persicae have amplified genes (up to 80 copies) encoding the insecticide-detoxifying esterase e4. this paper reports the analysis of methylation of the e4 gene and its flanking dna with the use of methylation-sensitive restriction enzymes, cpg profiling and bisulphite sequencing. in combination these show that e4 has 5-methylcytosine confined to cpg doublets, as previously shown for vertebrate genomes; this is the first such report for an insect gene. the meth ... | 2000 | 10903149 |
| cloning, heterologous expression and co-assembly of mpbeta1, a nicotinic acetylcholine receptor subunit from the aphid myzus persicae. | nicotinic acetylcholine receptors (nachrs) play a major role in excitatory synaptic transmission in insects and are also the target site for chloronicotinyl insecticides such as imidacloprid. here we report the cloning and characterization of a novel nachr beta subunit, mpbeta1, from the aphid myzus persicae, an economically important pest species. sequence analysis has identified an open reading frame of 509 amino acids with features typical of nachr subunits. the mpbeta1 gene is expressed as a ... | 2000 | 10771176 |
| amplification and methylation of an esterase gene associated with insecticide-resistance in greenbugs, schizaphis graminum (rondani) (homoptera: aphididae). | the greenbug aphid, schizaphis graminum (rondani) has developed resistance to organophosphorus insecticides by the over-production of esterases that have been classified as type i and type ii. the first twenty n-terminal amino acids of the type i esterase were determined and used to design an oligonucleotide, which in conjunction with an active site primer derived from conserved sequences of other insect esterases and two internal primers specific for esterases from another aphid species resulte ... | 1999 | 10612041 |
| links between the detritivore and the herbivore system: effects of earthworms and collembola on plant growth and aphid development. | effects of collembola (heteromurus nitidus and onychiurus scotarius) and earthworms (aporrectodea caliginosa and octolasion tyrtaeum) on the growth of two plant species from different functional groups (poa annua and trifolium repens), and on the development of aphids (myzus persicae) were investigated in a laboratory experiment lasting 20 weeks. using soil from a fallow site which had been set aside for about 15 years, we expected that nitrogen would be of limited supply to plants and hypothesi ... | 1999 | 28307712 |
| modeling and biological implication of time-dose-mortality data for the entomophthoralean fungus, zoophthora anhuiensis, on the green peach aphid myzus persicae | the entomophthoralean fungus zoophthora anhuiensis frequently causes epizootics in populations of the green peach aphid, myzus persicae, infesting cruciferous crops in the middle and lower regions of the changjiang river, china, during late autumn and early winter. in this study, a bioassay was conducted by exposing aphids on detached leaves to varying doses of z. anhuiensis conidia discharged from in vitro cultures. ten doses (1.5-198 conidia/mm2) were used, with each dose including 64-120 aphi ... | 1998 | 9784347 |
| a study of variation in rdna its regions shows that two haplotypes coexist within a single aphid genome. | we report variation in the rdna internal transcribed spacers (itss) of aphid species, the first for these insects. variation at 6 sites within its1 sequences of the green peach aphid, myzus persicae, identified two haplotypes coexisting within the same individuals, indicating that molecular drive has not homogenised different copies of rdna. during this study, we found that pcr can cause a precise 58-bp loss in the amplified copies of an its haplotype (type 1). this occurs in all detectable copi ... | 1998 | 9729768 |
| orientation of the 'stretched' univalent x chromosome during the unequal first meiotic division in male aphids. | in situ hybridization was used to label the ends of the x chromosomes of two aphid species, myzus persicae and amphorophora tuberculata, in order to study the peculiar behaviour and orientation of the univalent x in aphid spermatogenesis. anaphase i begins with the long axis of the x chromosome at right angles to the spindle and its two chromatids closely associated, but as the division proceeds the chromatids separate along most of their lengths, retaining only a midway connection as the x chro ... | 1998 | 9609660 |
| a 169-base pair tandem repeat dna marker for subtelomeric heterochromatin and chromosomal rearrangements in aphids of the myzus persicae group. | numerous copies of a 169-base pair dna sequence (myzus persicae group repeat; mpr) occur at subtelomeric locations on all chromosomes of three members of the myzus persicae species group (myzus persicae, m. antirrhinii, m. certus). mpr occurs in large tandem arrays at both ends of all autosomes of the standard 2n = 12 karyotype, and near one end of the x chromosome (the end opposite to the nucleolar organizer) and is estimated to make up about 5% of the genome (a total of about 200000 copies). l ... | 1998 | 9609659 |
| structure and organization of amplicons containing the e4 esterase genes responsible for insecticide resistance in the aphid myzus persicae (sulzer). | insecticide resistance in the aphid myzus persicae results primarily from the amplification of genes encoding the insecticide-detoxifying esterase, e4. here we report the analysis of flanking dna co-amplified with the e4 gene. the 5' end of this gene has an untranslated leader sequence interspersed by two introns, and the promoter region lacks tata and caat boxes. the dna breakpoint involved in the generation of the amplification is just upstream (approx. 250 bp) of the putative e4 transcription ... | 1997 | 9148762 |
| aphicide persistence on spinach and mustard greens. | laboratory bioassays with green peach aphids, myzus persicae (sulzer), were conducted on samples from field grown spinach and mustard greens to determine the persistence of triazamate, dimethoate, and mevinphos. treatment with each insecticide resulted in similar mortality initially on both crops. mortality on samples from mevinphos treated plants declined considerably by 1 d after treatment. dimethoate persisted for > 4 d at a level that would kill at least some aphids during the allotted time. ... | 1997 | 9071890 |
| within-plant variation in concentrations of amino acids, sugar, and sinigrin in phloem sap of black mustard,brassica nigra (l.) koch (cruciferae). | although within-plant variation in the nutrient and allelochemical composition of phloem sap has been invoked to explain patterns of host use by phloem-feeding insects, little is known about within-plant variation in phloem chemistry. here i describe a new technique in which i use the green peach aphid,myzus persicae sulz., to investigate within-plant variation in the concentrations of chemicals in the phloem sap of black mustard,brassica nigra (l.) koch (cruciferae). relationships between the c ... | 1996 | 24225933 |
| sucrose esters of carboxylic acids in glandular trichomes ofsolanum berthaultii deter settling and probing by green peach aphid. | removal of type b trichome exudate fromsolanum berthaultii leaflets leads to a decrease in tarsal gumming and mortality and an increase in feeding by the green peach aphid,myzus persicae. type b trichome exudate of thes. berthaultii accession pi 473331 is composed of a complex of 3',3,4,6-tetra-o-acyl sucroses containing primarily short-chain branched carboxylic acids. the acyl constituents are primarily derived from 2-methylpropanoic, 2-methylbutyric, and 8-methylnonanoic acids but constituents ... | 1990 | 24263505 |
| [salivary glands of myzus persicae (homoptera, aphididae): structure and secretory rhythm]. | the salivary glands of myzus persicae (homoptera, aphididae): structure and secretory rythm. studying the structure of the salivary glands of myzus persicae, a particular mode of working of these organs were observed. the glands seem to function in an alternative manner. this aspect is discussed with regards to the nutritional biting of the bug. | 1987 | 3442441 |
| preference of the green peach aphid, myzus persicae, for plants grown in sewage sludges. | | 1987 | 3663979 |
| disappearance of dimethoate, methamidophos and pirimicarb in lettuce. | foliar sprays of dimethoate at 150 or 300 g a.i./ha, methamidophos at 450 or 900 g a.i./ha and pirimicarb at 140 or 280 g a.i./ha were applied for control of the green peach aphid, myzus pericae (sulzer), and the lettuce aphid, nasonovia ribisnigri ( mosley ), about 2 weeks before the lettuce started heading, and again about 1 week from harvest. in lettuce, dimethoate partially oxidized to its oxon and pirimicarb converted to its methylamino- and/or formyl methylamino-analogues. most residues we ... | 1984 | 6736564 |
| [breeding of a biotype of myzus persicae sulzer on a synthetic medium. v- influence of oxalic and gentisic acids on the nutritive value of a synthetic medium]. | studies on the survival, fecundity, and food consumption by m. persicae reared on synthetic diets, have indicated: --gentisic and oxalic acids have a deleterious effect as most important as their dose is high. --succinic acid reduces, at least for the used concentrations, the deleterious effect of the oxalic acid, but not that of the gentisic acid. --gentisic acid is quickly decreasing food consumption. --the deleterious effect of oxalic and gentisic acids is not decreasing with time. the result ... | 1980 | 7416660 |
| acetaldehyde--a potential fumigant for control of the green peach aphid on harvested head lettuce. | | 1979 | 528743 |
| electrophoretic study of genetic variation in british myzus persicae (sulz.) (hemiptera, aphididae). | | 1978 | 743199 |
| [breeding of a biotype of the aphia myzus persicae on a synthetic medium. iv. influence of vitamins, especially vitamin c and pyridoxine, on the nutritional value of nutritive fluids]. | the nutritive value of synthetic diets for myzus persicae was evaluated by measuring reproduction of the third generation on each medium: 1. in the presence of a double dose of pyridoxin, the nutritional value of the basic diet was improved. this improvement disappeared when all the vitamins of the b group were also at double dose; 2. in the presence of a double dose of ascorbic acid, the nutritional value of all the diets was improved. this improvement was observed for a single or a double dose ... | 1978 | 104648 |
| role of monoamine metabolism in wing dimorphism of the aphid myzus persicae. | | 1976 | 11073 |
| [nutritional budgets for third stage instars of myzus persicae (sulz.)]. | a general equation is provided for the nutritional budgets of both morphal stages of third-instar larva of the green-peach aphid myzus persicae (sulz.), fed on an artificial diet. uptake of food and oxygen is related to: 1) gain in (fresh) weight, 2) amount of excrement, 3) carbon dioxide respired, and 4) water lost by transpiration (table 4).aphids fed holidicly exhibit a respiratory quotient of 1.0 during food uptake, thus using mainly carbohydrates during respiration. hence, based upon quanti ... | 1975 | 28308812 |
| [rearing of a biotype of myzus persicae sulzer on synthetic media. iii. respective nutritive value of l-methionine, l-cysteine and sulfates]. | the respective influence of some different components of a synthetic diet on the survivial and the fecundity of one strain of myzus persicae slz. have been established by experiments with the deletion of some components and with variations of their concentrations. 1. l.methionin is the only essential amino-acid amd the variations of its concentrations are related with variations of the fecondity of the aphids. 2. when the amount of l. methionin is inadequate to satisfy the whole sulphur requirem ... | 1975 | 1227369 |
| incorporation of thymidine into the chromosomes of aphid (myzus persicae) embryos. | | 1974 | 4474087 |
| sugar, organic acid, phenolic acid and plant growth regulator content of extracts of honeydew of the aphid myzus persicae and of its host plant, raphanus sativus. | the honeydew of myzus persicae feeding on radish seedlings contains glucose, fructose, trehalose, melezitose and sucrose, of which glucose and fructose are present in radish seedlings. in addition, the honeydew contains eight organic acids, of which seven are present in uninfested seedlings and six are present in infested radish seedlings: of the eighteen phenolic acids in the honeydew, five are present in uninfested radish seedlings. auxins, gibberellins, growth inhibitors and cytokinins are pr ... | 1974 | 19280790 |
| [effect of atp in a synthetic diet on myzus persicae (sulz.) (aphidina)]. | | 1974 | 4847667 |
| an in vitro study of esterases hydrolysing specific substrates of an op-susceptible and an op-resistant strain of the green peach aphid, myzus persicae sulz. | | 1973 | 4788463 |
| an electrophoretic study of some hydrolases from an op-susceptible and an op-resistant strain of the green peach aphid, myzus persicae (sulz.). | | 1973 | 4350965 |
| control of the green peach aphid and suppression of leaf roll on potatoes by systemic soil insecticides and multiple foliar sprays. | | 1973 | 4690263 |
| an insecticide and a defoliant evaluated for use in a program of integrated control designed to suppress the green peach aphid on peach trees. | | 1972 | 5008977 |
| dietary amino acid requirements of the aphid myzus persicae affected by antibiotic uptake. | | 1971 | 5565091 |
| variation in the photoperiodic response within natural populations of myzus persicae (sulz.). | | 1971 | 22894860 |
| mass rearing parasite-free green peach aphids in the greenhouse. | | 1971 | 5558295 |
| chromosomal abnormalities in an anholocyclic biotype of myzus persicae (sulzer). | | 1971 | 5556464 |
| | certain plants are able to convert first stage larvae of the green peach aphid into apterous larvae although the larger part of them would develop into alates if reared continuously on a holidic diet.this apterousness promoting principle (app principle) has a greater effect on previously starved larvae and on those whose extremities were partly amputated. the app principle can be shown most clearly in young radish seedlings, as well as in other young plants if they are optimal hosts. it is reduc ... | 1971 | 28312448 |
| comparison of the biology of myzus persicae sulz. resistant and susceptible to dimethoate. | | 1970 | 5491865 |
| effect of artificial diet composition on wing-production by the aphid myzus persicae. | | 1970 | 5449726 |
| application of scanning microscopy in the study of virus transmission of aphids. | the scanning electron microscope was used in conjunction with the transmission electron microscope to study stylet morphology and the role of stylets of the green peach aphid in plant virus transmission. the morphology of the stylets generally agreed with earlier descriptions of these parts obtained with the transmission electron microscopy. a considerable variation seemed to exist in the extent and regularity of ridges observed in different individuals, especially among apterous adults and nymp ... | 1968 | 16789086 |
| improvement of synthetic diet for the aphid myzus persicae using plant juices, nucleic acids, or trace metals. | | 1967 | 6046968 |
| [effect of some factors on the development of alate forms in the peach louse (myzus persicae sulz.)]. | | 1967 | 5586737 |
| endosulfan, oxydemetonmethyl, and endrin in control of the green peach aphid and suppression of leaf roll in potatoes in eastern washington. | | 1966 | 5976106 |
| studies on the artificial feeding of the aphid myzus persicae (sulzer)--3. some major nutritional requirements. | | 1965 | 5827534 |
| the purification of viruslike particles from the aphid myzus persicae. | | 1965 | 14295230 |
| short-term probing behavior of myzus persicae (sulzer) as affected by fasting, anesthesia, and labial manipulation. | | 1963 | 13979776 |
| fatty acids: in vivo synthesis by the green peach aphid, myzus persicae (sulzer). | after feeding through an artificial membrane on an 18 percent sucrose solution containing either acetate-1-c(14) or uniformly-labeled glucose-c(14), myzus persicae incorporated 75 percent of the carbon-14 into palmitoleic, stearic, and oleic acids. small amounts were incorporated into myristic, linoleic, and linolenic acids; no significant amounts were incorporated into the short-chain fatty acids. | 1963 | 17836485 |
| [on the functional morphology of the salivary glands of homoptera. part i. the chief cells of the principal gland of myzus persicae (sulz.), aphididae]. | | 1960 | 14423192 |
| [on functional morphology of salivary glands of homoptera. report 3: the accessory gland of myzus persicae (sulz.), aphididae]. | | 1960 | 13786197 |
| [on the functional morphology of the salivary glands of homoptera. iv. the secretory ducts of the salivary glands of myzus persicae (sulz.), aphididae]. | | 1960 | 13771645 |
| studies on the behavior of potato leaf roll and other viruses in the body of their aphid vector myzus persicae (sulz.). | | 1958 | 13581530 |
| three more viruses borne at the stylet tips of the aphid myzus persicae (sulz.). | | 1957 | 13437229 |
| over-wintering of aphids, especially myzus persicae, sulzer, in root clamps. | | 1949 | 15402983 |
| the grouping and overwintering of myzus persicae sulz. on prunus species. | | 1949 | 18143239 |