EVALUATION OF 2 NEEM SEED KERNEL EXTRACTS AGAINST LIRIOMYZA-TRIFOLII (BURG) (DIPT AGROMYZIDAE)

Laboratory evaluation of Neem Azal-S and Margosan-O was carried out ag ainst the adult and larvae of Liriomyza trifolii Burgess. The feeding deterrent activity of both compounds was significantly realized agains t the adults particularly at high concentrations which lasted for 5 da ys after treatment. Both formulations also deterred the females from l aying eggs and the percentage of oviposition deterrent index (ODI) rea ched 80.7 and 52.6 for Neem Azal-S and Margosan-O (2%), respectively. Post infestation treatment of bean seedlings containing 3rd instar lar vae indicated that the toxic action of the tested extracts was quite l imited. However, different percentages of malformed pupae were obtaine d. The sex ratio between the resulting adults was nearly unaffected wi th the exception of individuals whose larvae were treated with 2% Neem Azal-S where all the resulting progenies were females.