EVALUATION OF CERTAIN ECOFRIENDLY INSECTICIDES AGAINST LEPIDOPTEROUS PESTS OF CABBAGE
Loading...
Files
Date
1997
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Professor Jayashankar Telangana State Agricultural University
Abstract
acillus thuringiensis var. kurstaki (B.t.k.) formulations Dipel, Delfin, Biobit,Biolep, Bioaspat0.075percent,botanicalinsecticideNeemgold0.03%, nematodeformulation(Steinernemafeltiae)Greencommandos@25sponges/acre and endosulfan at 0.07 per cent were evaluated against the lepidopterous pests of cabbage under field and laboratory conditions. Delfin was very effective in reducing the populations ofdiamond backmoth Plutel/axylostella (L.), cabbage leaf webber Crocido/omia binotaiis (Zell). Dipel was equally effective against these pests. Endosulfan proved to be effective against tobacco caterpillar Spodoptera Iitura (Fab). Under laboratory bioassay, all B.t.k. formulationswere equally effective againstP. xy/oste/la and C. binota/I's, resulting in 86.66 to 100.00 and 96.66 to 100.00 per cent mortality in 72 hrs. Endosulfan gave cent per cent mortality of S. litura. All the test insecticideswerefound to besafeand did notshowany adverse affect on coccinellid population under field conditions. The test insecticides did not show any adverse affect on parasitoid Trichogramma chilonis emergence when the Corcyra eggs were exposed for parasitisation and sprayed. Endosulfan and Neemgold sprayed eggs had relatively low parasitisation and adult emergence. Endosulfan residues were below MRL even at initial deposit.
Description
Keywords
null
Citation
D5404