Abstract:

This paper aims to study the optimum dosage and control effect of 3 insecticides, spinetoram suspension concentrate, Empedobacter brevis suspension concentrate and emamectin benzoate water dispersible granule against cherry drosophila, and to provide a scientific basis for the production and application. The field trial was conducted by routine spraying. 60 g/L of spinetoram suspension concentrate (24, 30 and 40 mg/L), 5% of emamectin benzoate water dispersible granule (5.00, 6.25 and 8.33 mg/L) and 10 billion spores/mL of Empedobacter brevis suspension concentrate (1.00×10 ⁷, 1.11×10⁷ and 1.25×10⁷ spores/mL) could effectively control cherry drosophila, the field efficacy was 89.02%-95.53%, 86.99%-91.87% and 87.40%-92.28%, respectively. Based on the experiment results and the ecological safety, the 3 insecticides are ideal agents to control cherry drosophila, it is recommended that 60 g/L of spinetoram SC at 30-40 mg/L, 5% of emamectin benzoate WG at 6.25-8.33 mg/L and 10 billion spores/mL of empedobacter brevis SC at 1.11×10⁷-1.25×10⁷spores/mL are sprayed alternately in the period of cherry fruit expansion and fruit color change to delay the onset of resistance.

Key words: Cherry Drosophila, Spinetoram, Emamectin Benzoate, Empedobacter brevis, Control Effect