Evaluation of the Efficacy of Plant-Based Pesticides Against Tobacco Aphids Hosted by Cigar and Safety of Tobacco Aphid Cocoon Bees
To test the efficacy of plant-based pesticides against tobacco aphids hosted by cigar,evaluate their safety to tobacco aphid cocoons,explore the feasibility of joint control,and scientifically guide the prevention and control of tobacco aphids in cigar,pyrethrins and rotenone were selected to conduct efficacy tests on tobacco aphids in greenhouse potted cultivation.The safety of tobacco aphid cocoons was evaluated through indoor toxicity testing of tobacco aphids and tobacco aphid cocoons.Both commonly used plant-based pesticides have control effects on tobacco aphids hosted by cigars.Over time,the efficacy gradually increases,reaching its peak at 7 days after treatment.The corrected control effect of pyrethroids is 74.75％,and that of rotenone is 80.96％.The safety of the two commonly used plant-based pesticides to the tobacco aphid cocoon bee are all at risk,with a safety coefficient of 48 hours being less than that of 24 hours;within 24 hours,it has good selectivity,and within 48 hours it is non-selective.Both plant-based pesticides have good control effects on tobacco aphids.Over time,the control effect on tobacco aphids increases,but it will reduce the safety and selectivity of tobacco aphid cocoons.The feasibility of joint prevention and control is not ideal.
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