EFFICACY OF MICROBIOLOGICAL AGENTS AGAINST RICE PESTS
DOI:
https://doi.org/10.47390/ydif-y2026v2i15/n04Keywords:
rice, microbiological preparations, agrobiocenosis, pests, aphids, shore flies, Bacillus thuringiensis, Beauveria bassiana, biological efficacy.Abstract
Under field experimental conditions, the biological efficacy of microbiological preparations against aphids and shore fly larvae occurring in the rice agrobiocenosis was studied. The experiments were conducted in 2021–2023 using a hand-operated sprayer with a working solution application rate of 300 L/ha. The study evaluated Bioslip BT, a preparation based on Bacillus thuringiensis, at application rates of 0.5, 1.0, and 1.5 L/ha, as well as the microbiological preparation Prestige based on Beauveria bassiana OPB-09 at rates of 2.0, 3.0, and 4.0 L/ha. In the untreated control, pest population density gradually increased during the observation period, whereas the application of microbiological preparations resulted in a substantial reduction in pest abundance. The biological efficacy of Prestige against aphids at an application rate of 3.0 L/ha was 65.0%, while its efficacy against shore fly larvae reached 68.4%. The application of Bioslip BT resulted in a biological efficacy of 60.0% against aphids and 66.6% against shore fly larvae. The obtained results indicate that microbiological preparations have considerable potential for the environmentally safe regulation of rice pest populations.
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