background: both azadirachtin and rotenone, two botanical pesticides have shown inhibit the growth of cultured insect cells. the inhibitory effect of rotenone on cell growth is through disruption of electron transport chain, but exact mechanism of effect of azadirachtin on growth of cell is unknown. this study was carried out to compare the effect of these phytochemical on oxygen consumption by...

BACKGROUND: Aphis glycines Matsumura, an invasive insect pest in North American soybeans, is fed upon by a key biological control agent, Harmonia axyridis Pallas. Although biological control is preferentially relied upon to suppress insect pests in organic agriculture, approved insecticides, such as neem, are periodically utilized to reduce damaging pest populations. The authors evaluated direc...

The objective of this study was to determine the toxicity of the neem biopesticide azadirachtin (NEEM-ON, Brand name) on the freshwater fish ‘Labeo rohita’. Fishes were exposed to various concentrations of botanical insecticide azadirachtin for 96 h and the percent mortality was recorded. The 96h LC50 value determined by Finney’s Probit Analysis Method was found to be 42.66 ppm. Behavioural pat...

The non-target effects of an azadirachtin-based systemic insecticide used for control of wood-boring insect pests in trees were assessed on litter-dwelling earthworms, leaf-shredding aquatic insects, and microbial communities in terrestrial and aquatic microcosms. The insecticide was injected into the trunks of ash trees at a rate of 0.2 gazadirachtin cm(-1) tree diameter in early summer. At th...

Interspecific variations in the susceptibility of freshly and embryonated eggs of Aedes albopictus, Ae. aegypti, Ae. atropalpus and Culex pipiens were tested against three classes of insect growth regulators (IGRs) including ecdysone agonist (azadirachtin), chitin synthesis inhibitor (diflubenzuron) and juvenile hormone analog (pyriproxyfen) at 0.001, 0.01, 0.1 and 1.0ppm concentrations. Egg ha...

The effect produced by neem seed extracts and a neem seed concentrate (NSC) on the mortality and development of Heterodera glycines was evaluated. Second-stage juvenile (J2) mortality produced by the extracts and NSC was determined. Soybean seedlings treated with each of the extracts (aqueous, methanolic and hexane) were inoculated with J2 and the number of females and eggs per root system dete...

Mixed formulation, azadirachtin+garlic and azadirachtin+Spilanthes provided 66.94% 66.44% thrips reduction 10 days after application respectively in cowpea crop, which was at par with imidacloprid. There are no significant differences among those treatments. Yield of these two treatments also the Recommended doses azadirachtin (1500 ppm) mixing garlic or Spilanthes is good for reduction. So the...

Received 10th December, 2012 Received in revised form 20th, December, 2012 Accepted 5th January, 2013 Published online 31 January, 2013 Objective: The antiplasmodial activity of pure n e e m l i m o n o i d s (azadirachtin, salannin, deacetylgedunin, gedunin, 17-h ydroxyazadiradione and deacetylnimbin) was evaluated in vitro against the chloroquine resistant and-sensitive strains of P. falcipar...