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为科学有效防治桃树山楂叶螨(Tetranychus viennensis Zacher)的危害,通过田间试验比较了5种不同植物源农药对桃山楂叶螨的防治效果。结果表明,0.2%苦皮藤素水剂和0.3%苦参碱水剂是防治桃山楂叶螨的较好生物药剂。其中0.3%苦参碱水剂防治效果最好,可以达到97.5%,持效期较长,药后15d防效仍在92.8%以上;0.2%苦皮藤素水剂速效性最好,药后1d,防效就达到88.4%,3d后防治效果最佳,达96.3%。
In order to scientifically and effectively control the damage of Tetranychus viennensis Zacher, field control experiments were conducted to compare the control effects of five different botanical pesticides on peach-haw spider mites. The results showed that 0.2% celangulin and 0.3% matrine were the best biological agents for controlling peach hawthorn spider mites. Among them, 0.3% matrine had the best control effect, which could reach 97.5% with a longer lasting period. The control effect was still over 92.8% after 15 days. 0.2% celangulin was the best, 1d, the control efficiency reached 88.4%, the best control effect after 3d, reaching 96.3%.