Deterrence and behavioral mode of coconut oil-derived free fatty acids on Zeugodacus cucurbitae oviposition.

Previous studies have shown oviposition deterring properties of 8 coconut free fatty acid (CFFA) compounds on fruit flies with different key deterrent components for different species. Here we evaluated oviposition deterrence of CFFA using laboratory 2-choice bioassays against Zeugodacus cucurbitae, determined key-bioactive deterrent compounds, and evaluated their behavioral mode. Unlike other reported fruit fly species, CFFA mixture increased Z.

"Click" reaction based synthesis of nimbolide derivatives and study of their insect antifeedant activity against Spodoptera litura Larvae.

A series of Nimbolide-triazole conjugates were synthesized through copper(I)- catalyzed azide-alkyne "click" chemistry approach and these derivatives (2-4, 2a-2l) were characterized using modern spectroscopic techniques. Antifeedant activities of these derivatives were studied on Tobacco Caterpillar, Spodoptera litura (F.) using no-choice leaf disk bioassay.

Feeding-induced phenol production in Capsicum annuum L. influences Spodoptera litura F. larval growth and physiology.

We studied the role of induced plant phenols as a defense response to insect herbivory. Phenolic compounds were induced in Capsicum annuum L., the source of many culinary peppers, after feeding by different stages of the insect pest, Spodoptera litura F.