【摘要】 在京郊有机梨园中国梨喀木虱越冬代成虫和1代若虫发生关键时期,以石硫合剂和苦参碱为主要防治药剂,混配一定比例的烟草浸提液,调查和分析了混配制剂对中国梨喀木虱成虫和若虫的防治效果。结果表明,对越冬代成虫,45%石硫合剂结晶与烟草浸提液2∶1混配后,药后7d防治效果由仅使用45%石硫合剂结晶的45.23%提高到67.16%;对第一代若虫,0.5%苦参碱与烟草浸提液4∶1混配后,药后7 d防治效果提高了14.23%。试验结果证明,在石硫合剂和苦参碱中添加一定比例的烟草浸提液可提高梨喀木虱越冬代成虫和第一代若虫的防治效果。更多还原

【Abstract】 The mixed preparations of tobacco tea with matrine and lime sulphur was used for control of overwintering generation adults and 1 stgeneration nymphs of Cacopsylla chinensis Yang et Li on the organic pear orchard in Beijing suburb. For overwintering generation adults, the control efficacy of tobacco tea mixed with 45% crystal lime sulphur(at the ratio of 2:1) increased from 45.23% to 67.16%. For 1 s tgeneration nymphs, the control efficacy of tobacco tea mixed with 0.5% matrine(at the ratio of 4:1) increased 14.23%. The experiment results demonstrated that mixing tobacco tea with matrine and lime sulphur increased the control efficacy on both overwintering adults and 1 stgeneration nymphs.更多还原