Efficacy of Various Strengh of Tebufenozide under Residue Film Method on Biomass Cumulation in Larva of Pericallia Ricini Fab (Lepidoptera)

Abstract

The treatment of adults with residue film of any strength of the tebufenozide reduced the biomass accumulation on the 5^th day in larva as compared to the untreated adults (P<0.05). In response to adult’s treatment with the residue film of different concentrations of the tebufenozide, the larval biomass on the 5^th day varied from 1.86 to 3.04 mg, tending to decrease with the increasing concentrations of the insect growth regulators but the statistical analysis revealed that the larval biomass at 0.0001 percent concentration (3.04mg) was more than that at any of concentrations from 0.001 to 0.01 (2.65 to 2.85) (P<0.05) and that the larval biomass at any of the latter concentrations was more than that at any of 0.50 and 1.00 per cent concentrations (1.86 to 1.98 mg) (P<0.05).