2种生物农药防治有机水稻稻纵卷叶螟药效研究  

Study on the Effect of Two Different Biopesticides Against Cnaphalocrocis Medinalis in Organic Rice Farming

作　　者：曾晓楠[1] 聂乾忠[2] 宾秋实[1] 

机构地区：[1]湖南生物机电职业技术学院,湖南长沙410127 [2]湖南农业大学

出　　处：《现代农业科技》2009年第13期149-150,共2页Modern Agricultural Science and Technology

摘　　要：研究2种生物农药对有机水稻稻纵卷叶螟的防效，结果表明：在稻纵卷叶螟1-2龄幼虫高峰期用0．3％印楝素乳油1500mL／hm^2具有理想的防治效果，其杀虫、保叶效果分别达89．9％和85．8％，Bt乳剂500倍液对水稻纵卷叶螟也有较好的防治效果，杀虫、保叶效果分别达83．9％和83．1％。两者不仅对稻株无药害，而且有明显的增产作用，可以作为当前有机稻米生产过程中防治稻纵卷叶螟的理想药剂。Effect of two different biopesticides against Chaphalorocis medinalis in organic rice was studied. The results showed that the application of 1 500mL/hm2 of 0.3% azadirachtin EC revealed a good preventive effects against Cnaphalocrods Medinalis in organic rice farming at the peak of 1st and 2nd larvae age.The insecticide rate and leaves retaining rate reached some 89.9% and 85.8%respectively.The application of 500 x BT emulsion also showed a good preventive eflficiency against Cnaphalocrocis Medinalis and corresponding insecticide rate and leaves retaining rate were 83.9% and 83.1%. Further,both of these two biopesticides imposed no phytotoxicity and on the contrary dramatically but also increased the unit output. It is concluded that both of these two biopesticides could be an optimal option for preventing the outbreak of Cnavhalocrods Medinalis in ortganic rice farming.

关 键 词：印楝素乳油 BT乳剂 稻纵卷叶螟 防效 

分 类 号：S435.112.1[农业科学—农业昆虫与害虫防治] S481.9[农业科学—植物保护]