Plumbagin, a naphthoquinone occurring in the plants belonging to Plumbago sp. is known to have insect growth disrupting activities. In the present study, a comparative evaluation of bioactivities of related naphthoquinones, juglone and menadione and benzoquinones, 2,6-dimethylbenzoquinone and 2,3,6-trimethylbenzoquinone along with 2,6-dimethylhydroquinone have been undertaken using Dysdercus koenigii. The LD50 values of the compounds showed wide variation. Although all the test compounds disrupted the normal growth at sublethal doses, 2,6-dimethylbenzoquinone and menadione showed activity at low doses.
A. Banerji, Magdum, S., Kalena, G. P., and A. Banerji, “Insect growth regulatory activity of naturally occurring quinones and their derivatives in Dysdercus koenigii Fabr.(Hem., Pyrrhocoridae)”, Journal of Applied Entomology, vol. 125, pp. 25–30, 2001.