PATIL, B VMAHANTHA SWAMY, M V2019-10-222019-10-221999No . of references 64http://krishikosh.egranth.ac.in/handle/1/5810132386Studies on toxicity of different pesticides to earth worm eudrilus ugeniae by incorporation and topical application method was conducted at Department of Agncultural Entomology, College of Agnculture, Raichur - 584 101 dunng 1998-99. Results indicated that maximum mortality was recorded in case of incorporation method than topical apphcation o f pesticides to food matenal. Among the different pesticides monocrotophos 36 SL, endosulfan 35 EC and qumalphos 20 AF were extremely toxic; glyphosate 48 EC, methylparathion 2% dust dicofol 18.5 EC, paraquat 24 WSL, carbaryl 50% WP were moderately toxic; fenvelerate 20 EC, mancozeb 75 % WP, malathion 5% dust, wettable sulphur 80% WP were less toxic and botamcals were safe to earthworms. Endosulfan 35 EC was found extremely toxic to all the four species of earthworms viz., Eisenia foetida, Pertom’x excavatus, Lampito mauntii and E. eugeniae which caused mortalit>' of more than 50 per cent. The pattern of lethalit}' and extent of mortality of earthworms in carbofuran 3 G, carbendazim 50 WP, trifluralin 48 EC and dicofol 18.5 EC were different with respect to different species of earthworms. Eisenia foetida was less susceptible as compared to other three species of earthworm. Mortality' of earthworm, E. eugeniae was maximum wath treatment 25 per cent higher than the recommended dosage of pesticides viz., carbofuran 3 G, endosulfan 35 EC, carbendazim 50 WP, trifluralin 48 EC and dicofol 18.5 EC as compared to recommended dosage o f above pesticides. There was no significant difference between the reduced dosage treatments. Endosulfan 35 EC recorded longer residual toxicity among different pesticides tested.ennullThesis