Persistent circulative transmission of plant viruses involves complex interactions between the transmitted virus and its insect vector. Several studies have shown that insect vector proteins are involved in the passage and the transmission of the virus. Interestingly, proteins expressed by bacterial endosymbionts that reside in the insect vector, were also shown to influence the transmission of...

Nicotinic acid containing pyridine nucleus having side chain at third position gives the significant effect on toxicity to the insects. Therefore, we have reported the synthesis of some nicotinic acid derivatives and their insecticidal activities. The strategy employed for the synthesis of desired nicotinic acid derivatives involved esterification of nicotinic acid. The methyl nicotinate get de...

Certain essential plant oils, widely used as fragrances and #avors in the perfume and food industries, have long been reputed to repel insects. Recent investigations in several countries con"rm that some plant essential oils not only repel insects, but have contact and fumigant insecticidal actions against speci"c pests, and fungicidal actions against some important plant pathogens. As part of ...

the effect of the fungus, metarhizium anisopliae, sub-lethal dose of imidacloprid, the aphid, myzus persicae and the three canola cultivars under microcosm conditions inside plastic cages in greenhouse (27 ± 3°c, rh 90 ± 5 %) indicated that field and semi-field concentrations of the fungus significantly reduced the population of green peach aphid (gpa) as well as in combination with lc10 of imi...

During greenhouse production in Spring 1995, conditioning treatments were applied to columbine (Aquilegia ×hybrida Sims ‘McKana Giants’), New Guinea impatiens (Impatiens hawkeri Bull. ‘Antares’), marigold (Tagetes erecta L. ‘Little Devil Mix’) and ageratum (Ageratum houstonianum Mill. ‘Blue Puffs’) plants. Treatments included: mechanical conditioning (brushing 40 strokes twice daily); moisture ...

Due to the detrimental side-effects of synthetic pesticides, use nonchemical strategies in management insect pests is necessary. In present study, susceptibility fourteen eggplant cultivars green peach aphid (M. persicae) were investigated. According preliminary screening tests, ‘Long-Green’, ‘Ravaya’ and ‘Red-Round’ as relatively resistant, ‘White-Casper’ ‘Pearl-Round’ susceptible recognized. ...