6种植物源杀虫剂对黄纹竹斑蛾的防治效果

近年来,由于不合理的防治措施,黄纹竹斑蛾已成为危害毛竹叶片的主要害虫。为探索有效控制黄纹竹斑蛾危害的无公害防治措施,试验研究了不同浓度的6种植物源杀虫剂:0.5%藜芦碱可溶性液、1%苦皮藤素可溶液、4%鱼藤酮乳油、1.5%苦参碱可溶液、1.2%烟碱·苦参碱可溶液和1.1%苦参碱粉剂对黄纹竹斑蛾幼虫的防治效果,其中前5种药剂采用喷烟技术施药,后一种药剂采用喷粉技术施药。结果表明:施药后3 d,6种药剂的防治效果均达90%以上;0.5%藜芦碱可溶性液、1%苦皮藤素可溶液和4%鱼藤酮乳油的田间最佳用药浓度是原药与0号柴油容积比为1:40,用药量为1 200 mL/hm²;1.5%苦参碱可溶液、1.2%烟碱·苦参碱可溶液田间最佳用药浓度是原药与0号柴油容积比为1:9,用药量为800 mL/hm²;1.1%苦参碱粉剂田间最佳用药量为22.5 kg/hm²。上述6种植物源杀虫剂均可作为无公害防治黄纹竹斑蛾幼虫的药剂,在黄纹竹斑蛾幼虫危害时施用。

Control Effect of 6 Kinds of Botanical Insecticides on Allobremeria plurilineata

In recent years, Allobremeria plurilineata has become the major pest threatening the leaves of moso due to the unreasonable preventive measures. In order to explore the effective pollution-free ways to control the population growth of A. plurilineata, experiments were conducted to analyze the control effect of 6 kinds of botanical insecticides with different concentrations on A. plurilineata, including 0.5% resveratrol alkali soluble liquid, 1% Celangulins hormone solution and 4% rotenone EC, 1.5% matrine solution, 1.2% nicotine and matrine solution, and 1.1% matrine powder dosage. The first 5 insecticides were applied by using smoke spray technology while the last one was applied by using powder spay technology. The results showed that in the third day after application, the control effect 6 kinds of chemicals were above 90%. The insecticides of 0.5% resveratrol alkali soluble liquid, 1% Celangulins solution, and 4% rotenone EC could achieve the best effect with the applied amount at 1200ml/ha, and the best concentration was 1:40 between TC and No. 0 diesel oil, those of 1.5% matrine solution, and 1.2% nicotine and matrine solution had the best concentration at 1:9 between technical materials and No. 0 diesel oil and the optimal dosage at 800 mL/ha, that of 1.1% matrine powder had the best dosage at 22.5 kg/ha. The above 6 botanical insecticides could be used for pharmaceutical pollution prevention and control of A. plurilineata, which could be applied during the larval stage of A. plurilineata.