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Effect of neem ( Azadirachta indica A. Juss) seed kernel extracts on the larval parasitoid Bracon brevicornis Wesm. (Hym., Braconidae)
Author(s) -
Srivastava M.,
Paul A. V. N.,
Rengasamy S.,
Kumar J.,
Parmar B. S.
Publication year - 1997
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1997.tb01370.x
Subject(s) - biology , braconidae , parasitoid , azadirachtin , azadirachta , larva , pupa , meliaceae , botany , toxicology , zoology , ecology , pesticide
The alcoholic and hexane extracts of 17 neem ecotypes of India have been found to be toxic to the egg, larval and pupal stages of the cosmopolitan, external gregarious larval parasitoid Bracon brevicornis (Wesm.). In general, the hexane extracts showed higher toxicity against the egg and pupal stages whereas the alcoholic extracts were more toxic against the larvae. Azadirachtin content of the neem ecotypes revealed no apparent correlation with the observed toxicity against different stages of the parasitoid.