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为了筛选出防治甘草萤叶甲Diorhbda tarsalis Weise的生物药剂,采用多种生物源药剂,通过室内、田间试验,进行综合分析。室内毒力测定结果表明,甘草萤叶甲对0.5%黎芦碱SL的敏感性最高,LD50为0.139mg/L,0.3%印楝素EC、L2、1%苦参碱SL、L1依次递减,LD50分别为0.457,1.352,2.014和2.251mg/L,均高于其他药剂。田间防效结果表明,黎芦碱药后21d对甘草萤叶甲的防效最高,为100%,苦参碱、印楝素次之,均为86.67%,L2、L1的分别为66.67%和40%;对非靶标害虫小绿叶蝉也有较好的控制作用,药后21d防效L1较低,为56.67%,其他防效均高于68.89%;对田间天敌多异瓢虫和中华草蛉的安全性,除黎芦碱外,印楝素、苦参碱、L2、L1均较好,药后21d校正虫口减退率最高为57.14%;另外,苦参碱药后各期生物多样性指数平均最高,为2.93,印楝素次之,为2.88,藜芦碱、L1、L2依次递减,分别为2.45,2.43和2.07。因此,印楝素、苦参碱是防治甘草萤叶甲的理想药剂。
In order to screen out biological agents for prevention and treatment of Diorhbda tarsalis Weise, a variety of biological source agents were used for comprehensive analysis through indoor and field experiments. The results of indoor toxicity test showed that the highest sensitivity of L. lucorum to 0.5% rutin SL was 0.139 mg / L, 0.3% azadirachtin EC, L2, 1% matrine SL and L1 decreased in sequence, LD50 were 0.457,1.352,2.014 and 2.251mg / L, all higher than other drugs. The results of field control showed that 21 days after treatment with Lilukine, the control effect was highest, 100% for malachite, 86.67% for matrine and azadirachtin, 66.67% for L2 and L1, respectively 40%; the non-target pest leafhopper green leafhopper also has a better control effect, 21d after the drug control effect of L1 is low, 56.67%, other control effects were higher than 68.89%; field natural enemies Ladybird and Chinese grass , Except azulene, azadirachtin, matrine, L2, L1 were better, 21 d after treatment, the highest corrected rate of pest mouth was 57.14%; In addition, matrine after each phase of the biological diversity index The highest average was 2.93, the second was azadirachtin, which was 2.88, veratridine, L1, L2 followed by decreasing, respectively, 2.45,2.43 and 2.07. Therefore, azadirachtin, matrine is the ideal agent to control licorice Diabrotica.