7种杀虫剂防治烟蚜药效研究

目的]筛选出对烟蚜防治效果好的杀虫剂。方法]以虫口减退率和防治效果为评价指标,在田间对3%啶虫脒EC、5%吡虫啉EC、24%灭多威AS、0.5%苦参碱AS、灭蚜宁DP、25%噻虫嗪WG和40%氧乐果EC 7种药剂防治烟蚜进行了筛选试验,清水为对照。结果]7种药剂中,以5%吡虫啉EC 750 g/hm2对烟蚜防治效果最好,药后3、5、7 d对烟蚜校正防效均超过90%,与除3%啶虫脒EC500 g/hm2外的其余药剂校正防效差异达到显著性水平;3%啶虫脒EC 500 g/hm2防效次之,药后5、7 d防效与0.5%苦参碱AS 1 250g/hm2、40%氧乐果EC 937.5 g/hm2差异达到显著性水平。结论]5%吡虫啉EC与3%啶虫脒EC用于防治烟蚜速效性强,持效期长,显著优于对照药剂氧乐果的防效,是防治烟蚜的理想药剂,且对烟株安全,可在烟草上推广使用。

Experiments on Control of Myzus persica (Sulzer) with 7 Kinds of Insecticides

Objective] The purpose was to screen out the insecticides with good control effect of Myzus persica(Sulzer).Method] With the decrease rate of insect and the control effect as the evaluation indicates,7 kinds of insecticides including 3% acetamiprid EC,5% imidacloprid EC,24% methomyl AS,0.5% matrine AS,Mieyaning DP,25% thiamethoxam,40% omethoate were used in the insecticide screening test on the control of M.persica in the field.Result] Among 7 kinds of insecticides,5% imidacloprid EC at 750 g/hm2 had the highest control efficiency and the control effects were over 90% in the 3,5,7 days after application,which had significant difference with other pesticides except 3% acetamiprid EC at 500 g/hm2.The next was 3% acetamiprid EC at 500 g/hm2 and the control effects were over 80% in the 5,7 days after application,which have significant difference with 0.5% matrine AS at 1 250 g/hm2 and 40% omethoate EC at 937.5 g/hm2.Conclusion] 5% imidacloprid EC and 3% acetamiprid EC used in control of M.persica had characters of strong rapidly available result and long persistent period and their control efficiencies were more remarkable than CK omethoate,which were the perfect insecticides for controlling M.persica with good safity and could be extended in tobacco.