Ecotoxicology Lab., Department of Agricultural Entomology, University of Agriculture, Faisalabad, Pakistan.
*Correspondence to Mr. Riaz Hussain, H. No. 99/4, Azeem Street, Mandi Mohallah, Pakpattan-Pakistan. Phones 092 457 211207, Mobile 092 301 7243929
Email: riazhussain37@hotmail.com
ABSTRACT
Laboratory studies were carried out to determine the susceptibility of 10-d-old adults of malathion-resistant (PAK) and organophosphates-susceptible (FSS-II) strains of Tribolium castaneum to abamectin, spinosad and indoxacarb after 48 hours of treatment through residual film method. Adults of both strains were susceptible to abamectin and spinosad. The PAK strain was comparatively less susceptible to indoxacarb. Abamectin produced the lowest LC50 values for PAK (88 mg L-1) and FSS-II (109 mg L-1), strains. These findings support the hypothesis that adult PAK and FSS-II, strains of T. castaneum are susceptible to abamectin, spinosad and indoxacarb.
Keywords: abamectin; indoxacarb; LC50; spinosad; insecticide susceptibility; Tribolium.