Journal of Biopesticide

Journal of Biopesticide

2008, Vol. 1, Issue2

TOXICITY AND MORPHOGENETIC EFFECTS OF DIFFERENT BOTANICALS ON RED COTTON BUG DYSDERCUS KOENIGII FAB. (HEMIPTERA : PYRRHOCORIDAE) IN NORTH EASTERN HILL (NEH) REGION OF INDIA


AUTHOR(S)
M.H. Kodandaram*, N.S.Azad Thakur and A.N. Shylesha

ABSTRACT

Toxicity and morphogenetic effects of various botanicals was evaluated against third instar nymphs of Dysdercus koenigii by two bioessay techniques viz., dry film and seed dip methods. Anonin was found to be most toxic and econeem least toxic to the nymphs of D.koenigii. The descending order of toxicity of different botanicals for dry film method was anonin > imidacloprid > karanjin > achook > ecomeem, whereas by seed dip method the order was anonin > imidacloprid > achook > karanjin > econeem. All the botanical insecticides initiated dose dependent changes, resulting in delayed metamorphosis with abnormal wing development, no moulting and finally death within 24 - 48 h after treatements. Thus, the toxicity levels of various botanicals would serve as ready reckoner for the selection of various plant - based products for the management of red cotton bugs on okra and other crops in the NEH region.


DOI
https://doi.org/10.57182/jbiopestic.1.2.187-189

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