7种杀虫剂对油菜病毒病和传毒媒介蚜虫的防效评价

Control Efficiency Evaluation of Seven Insecticides against Oilseed Rape Virus Diseases and Its Viruliferous Aphids

田间防效试验结果表明:25%吡蚜酮WP90ga.i./hm2、25%噻虫嗪WG18.75ga.i./hm2、15%吡·丁硫EC33.75ga.i./hm2、70%吡虫啉WG31.5ga.i./hm2、10%吡虫啉WP30ga.i./hm2对油菜蚜虫和油菜病毒病均有较好的防效,其中25%噻虫嗪WG、15%吡·丁硫EC、70%吡虫啉WG、10%吡虫啉WP处理后3～5d对蚜虫的防效高达72.1%～83.6%,25%吡蚜酮WP处理后10d的防效高达79%,而对病毒病的防效为86.8%～94.3%。18%吡·噻WP81ga.i./hm2、5%啶虫脒WP18.75ga.i./hm2对蚜虫的防效差,药后3～7d的防效分别为46%～73%和47%～65%。

Field control efficiency of seven insecticides against oilseed rape virus diseases and its viruliferous aphids was evaluated. The results showed that these insecticides such as pymetrozine 25% WP 90 g a.i./ha,thiamethoxam 25% WG 18.75 g a.i./ha,imidacloprid·carbosulfan 15% EC 33.75 g a.i./ha,imidacloprid 70% WG 31.5 g a.i./ha and imidacloprid 10% WP 30 g a.i./ha had better control effects to virus diseases of oilseed rape and its viruliferous aphids. In which,control effects of thiamethoxam 25% WG,imidacloprid·carbosulfan 15% EC,imidacloprid 70% WG and imidacloprid 10% WP to the aphids were 72.1-83.6% for 3-5 days after treatment. While that of pymetrozine 25% WP was 79% to viruliferous aphids on the 10th day after spraying. The five insecticides mentioned above had 86.8-94.3% control effects to virus diseases. Imidacloprid·thiamethoxam 18% WP 81 g a.i./ha and acetamiprid 5% WP 18.75 g a.i./ha had no significant control efficiency against the viruliferous aphids,and their control effects were 46-73% and 47-65% for 3-7 days after treatment,respectively.