几种生物农药对水稻稻纵卷叶螟的田间药效试验  

The Field Trials of Some Biological Pesticides on Controlling Cnaphalocrocis medinalis

作　　者：李世广[1] 花日茂[2] 林华峰[1] 操海群[2] 胡娟[1] 胡鹏 

机构地区：[1]安徽农业大学植保学院,合肥230036 [2]安徽农业大学资源与环境学院,合肥230036 [3]安徽省巢湖市居巢区农技推广中心,安徽巢湖238000

出　　处：《农药》2009年第11期833-835,共3页Agrochemicals

基　　金：国家科技支撑计划项目(2007BAD87B06)

摘　　要：5种生物农药防治稻纵卷叶螟低龄幼虫田间试验结果表明:0.5%藜芦碱WP3000g/hm2、2.5%鱼藤酮EC4500mL/hm2、1.8%阿维菌素EC1200mL/hm2、2000IU/μL苏云金杆菌(B.t.)SC6000mL/hm2、400亿孢子/g白僵菌WP2400g/hm2(均为制剂用量)单独使用,药后7d校正防效在90.30%～94.60%之间,药后15d保叶效果在70.45%～84.09%之间,与对照药剂48%毒死蜱EC常规用量(750mL/hm2)防效差异均不显著,但单用速效性较差。而阿维菌素与B.t.之间,藜芦碱、鱼藤酮、阿维菌素、B.t.、白僵菌分别与毒死蜱之间,以单用时常规剂量的一半混用,可明显加快杀虫速度,药后3d防效在84.00%～92.96%之间,药后7d防效及药后15d保叶效果与单用相当或更好。因此,这5种生物农药可以部分替代高毒、高残留的化学农药来防治稻纵卷叶螟,从而显著减少化学农药的使用量。The efficacy of 5 biological insecticides against the lower instar larvae of Cnaphalocrocis medinalis were tested. The results showed that the control effects of veratridine 0.5% WP,rotenone 2.5% EC,abamectin 1.8% EC,Bacillus thuringiensis 2 000 IU/μL SC,Beauveria bassiana 4.0×1010 spores/g WP respectively at 3 000 g/ha,4 500 mL/ha,1200 mL/ha,6 000 mL/ha and 2 400 g/ha were between 90.30-94.60% in the seventh day after spraying the pesticides; and the effects of protective leaves were between 70.45-84.09% in the fifteenth day. Compared with chlorpyrifos 48% EC at 750 mL/ha,the differences of the control effects were not notable, but these biological insecticides took effect more slower than the chemical insecticide ehlorpyrifos. When mixing the two pesticides respectively at a half of the recommended dose that was sprayed alone, the control efficacy were significantly more quick than those of the insecticides they were sprayed respectively, the control effects were between 84.00-92.96% in the third day, the effects of controlling larvae in the seventh day and protective leaves in the fifteenth day were similar or better than those of spraying the single insecticide respectively. So the 5 biological insecticides can substitute partly for chemical insecticides to control lower instar larvae ofC. medinalis.

关 键 词：生物农药 稻纵卷叶螟 防治效果 

分 类 号：S482.3[农业科学—农药学]