摘要
[目的]筛选出对黏虫具有较好防治效果的生物农药。[方法]采用生测法和喷雾法分别测定了6种生物农药对黏虫的室内毒力和田间防效。[结果]阿维菌素对黏虫的3龄幼虫的毒力最高,其LC50值为0.91 mg/L,其次为短稳杆菌和绿僵菌1,其LC50值分别为2.73×10^4、4.90×10^6cfu/m L。田间试验结果表明:不同杀虫剂对黏虫幼虫的防效具有显著差异。施药3、7 d后,阿维菌素的防效均大于84%,显著高于其他杀虫剂;其次为短稳杆菌和甘蓝夜蛾NPV,药后3 d防效分别为67.33%和59.00%,药后7 d防效分别为70.67%和68.33%。[结论]阿维菌素对黏虫的具有较好的控制效果,建议在生产上使用。
[Aims] The study aims to screen out the bio-pesticides with good control efficacy against Mythimna separata. [Methods] Labaratory toxicity and field control efficacy of the six bio-pesticides against the 3 rdlarvae were investigated by bioassay and spray method, respectively. [Results] The results indicated that avermectin had the highest virulence to M. separata, and the LC50 was 0.91 mg/L. The second were bacterium Empedobacter brevis and Metarhizium anisopliae 1, and their LC50 were 2.73×10^4 and 4.90×10^6 cfu/mL, respectively. Field trials showed that the control efficacy against M. separata larvae were significantly different among tested bio-pesticides. The avermectin had the highest control efficacy after 3 or 7 d application with LC50 value of above 84%. After 3 d application, the control efficacy of Mamestra brassicae NPV and E. brevis were 67.33 and 59.00%, respectively, and the corresponding values reached 70.67 and 68.33% after 7 d application. [Conclusions] The avermectin can be recommended to control M.separata larvae in the field.
作者
龙育堂
戴长庚
胡阳
李鸿波
LONG Yu-tang;DAI Chang-geng;HU Yang;LI Hong-bo(Qingzhen Station of Plant Protection and Quarantine,Qingzhen 551400,Guizhou,China;Institute of Plant Protection,Guizhou Academy of Agricultural Science,Guiyang 550006,China)
出处
《农药》
CAS
CSCD
北大核心
2019年第12期908-910,914,共4页
Agrochemicals
基金
国家重点研发计划项目(2018YFD0200700)
公益性行业(农业)专项(201403031)
关键词
生物杀虫剂
黏虫
室内毒力测定
田间防效
bio-pesticides
Mythimna separata
labaratory toxicity
field control efficiency
