| differential larval toxicity and oviposition altering activity of some indigenous plant extracts against dengue and chikungunya vector aedes albopictus. | mosquitoes are well known as vectors of several disease causing pathogens. the extensive use of synthetic insecticides in the mosquito control strategies resulted to the development of pesticide resistance and fostered environmental deterioration. hence in recent years plants become alternative source of mosquito control agents. the present study assessed the larvicidal and oviposition altering activity of six different plants species-alstonia scholaris, callistemon viminalis, hyptis suaveolens, ... | 2014 | 26114131 |
| Begomoviruses infecting weeds in Cuba: increased host range and a novel virus infecting Sida rhombifolia. | As a result of surveys conducted during the last few years to search for wild reservoirs of begomoviruses in Cuba, we detected a novel bipartite begomovirus, sida yellow mottle virus (SiYMoV), infecting Sida rhombifolia plants. The complete genome sequence was obtained, showing that DNA-A was 2622 nucleotides (nt) in length and that it was most closely related (87.6% nucleotide identity) to DNA-A of an isolate of sida golden mosaic virus (SiGMV) that infects snap beans (Phaseolus vulgaris) in Fl ... | 2011 | 21964921 |
| molecular characterization of a distinct begomovirus species and its associated satellite dna isolated from malvastrum coromandelianum in china. | a virus isolate y160 was obtained from malvastrum coromandelianum showing yellow vein symptoms in baoshan, yunnan province of china. the complete nucleotide sequence of dna-a was determined, it contains 2747 nucleotides and has typical genomic organization of a begomovirus. comparisons show that the total dna-a of y160 has the highest sequence identity (82.2%) with that of malvastrum yellow vein virus-[y47] (aj457824), while less than 77.6% identities are found when compared with the other begom ... | 2005 | 15965607 |
| phytotoxicity of the volatile monoterpene citronellal against some weeds. | a study was undertaken to assess the phytotoxicity of citronellal, an oxygenated monoterpenoid with an aldehyde group, towards some weedy species [ageratum conyzoides l., chenopodium album l., parthenium hysterophorus l., malvastrum coromandelianum (l.), garcke, cassia occidentalis l. and phalaris minor retz.]. a significant effect on weed emergence and early seedling growth was observed in a dose-response based laboratory bioassay in a sand culture. emergence of all test weeds was completely in ... | 2009 | 16869489 |
| malvastrum yellow vein yunnan virus is amonopartite begomovirus. | nine samples of diseased malvastrum coromandelianum plants collected from the fields in yunnan province of china were found to be infected with malvastrum yellow vein yunnan virus (myvynv), when tested by pcr using specific primers. the results of pcr and southern blot analysis showed that only 4 samples out of 9 were associated with the satellite dnab molecules. their sequence analysis indicated that dnab molecules share 97.8%-99.4% of nucleotide sequence identities with dnab associated with my ... | 2010 | 20201610 |
| screening of some weeds for larvicidal activity against aedes albopictus, a vector of dengue and chikungunya. | screening of crude extracts of plants facilitates the establishment of highly effective extract for mosquito control. this practice should be preferred before in depth study of plant extracts rather than spending much efforts and energy in detailed examinations for practically ineffective extracts. in this study, leaf powders of four weed plants were used for the quick screening of effective plant extract as larvicide against iii instar larvae of aedes albopictus skuse. at the same time, effect ... | 2015 | 25815872 |
| a recombinant begomovirus resulting from exchange of the c4 gene. | a begomovirus isolated from malvastrum coromandelianum and tomato originating from yunnan province (china) was shown to be representative of a new begomovirus species, for which the name tomato leaf curl yunnan virus (tlcynv) is proposed. tlcynv has high levels of sequence identity to tomato yellow leaf curl china virus (tylccnv) across the whole genome, except for sequences encompassing the c4 gene. agrobacterium-mediated inoculation showed tlcynv to be highly infectious to a range of plant spe ... | 2013 | 23720217 |
| molecular variation of satellite dna beta molecules associated with malvastrum yellow vein virus and their role in pathogenicity. | previous studies have found that the diversity of begomovirus-associated dna beta satellites is related to host and geographical origin. in this study, we have cloned and sequenced 20 different isolates of dna beta molecules associated with malvastrum yellow vein virus (myvv) isolated from malvastrum coromandelianum plants in different geographical locations of yunnan province, china. analyses of their molecular variation indicate that the satellites are clustered together according to their geo ... | 2008 | 18245261 |
| complete nucleotide sequence of sida golden mosaic florida virus and phylogenetic relationships with other begomoviruses infecting malvaceous weeds in the caribbean. | the complete genome sequence of two isolates of the bipartite begomovirus (genus begomovirus, family geminiviridae) sida golden mosaic florida virus (sigmfv) is presented. we propose that both isolates, found infecting malvastrum coromandelianum (family malvaceae) in cuba, belong to a new strain of sigmfv. phylogenetic analysis showed that sigmfv dna-a is located in a monophyletic cluster that includes begomoviruses infecting malvaceous weeds from the caribbean. | 2010 | 20677027 |
| deciphering the biology of deltasatellites from the new world: maintenance by new world begomoviruses and whitefly transmission. | deltasatellites are small noncoding dna satellites associated with begomoviruses. the study presented here has investigated the biology of two deltasatellites found in wild malvaceous plants in the new world (nw). infectious clones of two nw deltasatellites (from malvastrum coromandelianum and sidastrum micranthum) and associated begomoviruses were constructed. infectivity in nicotiana benthamiana and their natural malvaceous hosts was assessed. the nw deltasatellites were not able to spread aut ... | 2016 | 27400152 |