首页分享几种植物源农药对苹果主要害虫的生物活性

几种植物源农药对苹果主要害虫的生物活性

来源：花匠小妙招时间：2024-11-02 11:28

摘要： 为构建苹果生产中的病虫害绿色防控体系，本研究通过室内活性测定和2年多批次田间药效试验评价了7种植物源农药对3种苹果害虫（绣线菊蚜、山楂叶螨和苹果桑天牛）的防治效果及应用技术。结果表明：0.5%藜芦碱可溶液剂（侬威）和0.3%苦参碱水剂（华禾克）对绣线菊蚜具有较强的毒力，其24h时LC50分别为8.316mg/L和5.494mg/L，在3333mL/hm2的制剂用量下，药后7d对绣线菊蚜防效均在70%以上；0.5%藜芦碱可溶液剂（万若翠）和0.3%苦参碱水剂（宝稼康）对山楂叶螨毒力较强，其24h的LC50分别为8.414mg/L和5.666mg/L，在3333mL/hm2的制剂用量下，药后7d对山楂叶螨防效均在78%以上；5%除虫菊素乳油注干施药防治桑天牛幼虫效果较好，1.25g/L的浓度下防治效果为62.09%。由此，推荐以0.5%藜芦碱可溶液剂（侬威）等4种药剂防治绣线菊蚜和山楂叶螨，可交替使用，推荐剂量为3333mL/hm2；以5%除虫菊素乳油注干施药防治桑天牛，推荐剂量为1.25g/L。

关键词: 植物源农药, 绣线菊蚜, 山楂叶螨, 桑天牛, 防治效果

Abstract: With the aim of establishing a green pest control system in apple production, seven plant-derived pesticides were evaluated for their control of three apple pests (Aphis citricola, Tetranychus viennensis and Aphis germari) using laboratory activity tests and two-year multiple batches of field efficacy tests. The results showed that 0.5% veratrine solution agent (Nongwei) and 0.3% soluble matrine (Huaheke) had strong toxicity to A. citricola, with LC50 of 8.316 mg/L and 5.494 mg/L at 24 h, respectively. At the dosage of 3333 mL/hm2, the control efficacy on A. citricola were more than 70% at 7 days after treatment. The 0.5% veratrine solution agent (Wanruocui) and 0.3% soluble matrine (Baojiakang) were toxic to T. viennensis, with LC50 values of 8.414 mg/L and 5.666 mg/L, respectively, and a control efficacy of more than 78% at 7 days after treatment with the dosage of 3333 mL/hm2.The 5% pyrethrin EC achieved a control efficacy of 62.09% on A. germari at the concentration of 1.25 g/L.

Key words: botanical pesticide, Aphis citricola, Tetranychus viennensis, Aphis germari, control effect

中图分类号:

S476