| extracellular lipase of an entomopathogenic fungus effecting larvae of a scale insect. | lipases play an important role in the infection process of entomopathogenic fungi by hydrolyzing the ester bonds of lipoproteins, fats and waxes present on the insect surface and in the body. here we report the purification and characterization of an extracellular lipase from isaria fumosorosea. the enzyme was purified (138.46-fold) in three steps using (nh4 )2 so4 precipitation followed by deae-cellulose and sephadex g-100 column chromatography. the molecular weight of purified enzyme was deter ... | 2014 | 24677050 |
| a new lavandulol-related monoterpene in the sex pheromone of the grey pineapple mealybug, dysmicoccus neobrevipes. | the grey pineapple mealybug, dysmicoccus neobrevipes, is a serious pest that attacks a variety of crops in tropical regions. recently, it was recorded on an island in southwestern japan, suggesting that its distribution is expanding. as a measure against this expansion, a monitoring tool is urgently needed. in this study we determined the structure of the sex pheromone of d. neobrevipes in order to develop an efficient lure for monitoring traps. volatiles collected from virgin adult females were ... | 2015 | 25618324 |
| transfer of lead (pb) in the soil-plant-mealybug-ladybird beetle food chain, a comparison between two host plants. | contamination of soil with heavy metals has become an issue of concern on global scale. this study investigates the translocation of lead (pb) along the soil - plant (eggplant and tomato) - mealybug (dysmicoccus neobrevipes) - ladybird beetle (cryptolaemus montrouzieri) food chain. soil amendments used for this study were adjusted to 0, 25, 50 and 100mg/kg of pb (w/w). the results revealed significantly higher transfer of pb in tomato when compared to eggplant. bio-magnification of pb (2-4 times ... | 2017 | 28558360 |
| biotransfer of cd along a soil-plant- mealybug-ladybird food chain: a comparison with host plants. | agro-ecosystem contamination by the heavy metals present in different agricultural products is a serious challenge faced by the living organisms. this study explains the cadmium (cd) transfer from soils contaminated with different cadmium concentrations through a plant (eggplant and tomato) - mealybug (dysmicoccus neobrevipes) - predator (cryptolaemus-montrouzieri) food chain. the soils were amended with cd at the rates of 0, 12.5, 25 and 50 mg/kg (w/w). our findings showed that considerably hig ... | 2017 | 27863794 |
| phylogenetic relationships of the endosymbionts of mealybugs (homoptera: pseudococcidae) based on 16s rdna sequences. | a portion of the gene coding for the 16s ribosomal rna from the endosymbionts of three species of mealybugs [pseudococcus longispinus (targioni-tozzetti), pseudococcus maritimus (ehrhorn), and dysmicoccus neobrevipes (beardsley)] was cloned, sequenced, and compared to a homologous fragment from bacteria representative of aphid endosymbionts as well as major subdivisions of the proteobacteria. parsimony analysis of the sequences indicated that the mealybug endosymbionts are related and belong to ... | 1992 | 1342920 |