10.4%吡虫啉·烯唑醇悬浮种衣剂对小麦蚜虫和纹枯病的防治效果

为了解10.4%吡虫啉·烯唑醇悬浮种衣剂对小麦纹枯病、蚜虫的防治效果及最佳用药量,采用室内和田间小区试验相结合的方法,以郑麦366为试验品种,以600g.L-1吡虫啉和12.5%烯唑醇为对照药剂,设置3种不同药种质量比(1∶50、1∶60、1∶70)处理,研究不同剂量的10.4%吡虫啉.烯唑醇悬浮种衣剂对小麦蚜虫和纹枯病的防治效果。结果表明,10.4%吡虫啉.烯唑醇悬浮种衣剂包衣对小麦发芽、出苗和生长无不良影响,用药剂量越大,对小麦蚜虫和纹枯病的防治效果越好。在防治蚜虫方面,该种衣剂在药种比为1∶50和1∶60时防效分别为85.61%～97.71%和80.15%～93.38%,与对照药剂600g.L-1吡虫啉FS1∶300包衣效果差异不显著;药种比为1∶70时,在蚜虫发生前期和中后期防效分别为91.32%～94.91%和74.88%～83.27%,其中中后期防效显著低于药种比1∶50、1∶60和对照药剂处理。在防治纹枯病和枯白穗方面,该种衣剂在药种比为1∶50时防效分别为76.91%～86.64%和78.29%,与对照药剂12.5%烯唑醇WP 1∶1500拌种处理差异不显著;药种比为1∶60时的防效分别为69.14%～80.87%和72.68%,显著低于药种比1∶50包衣处理,与对照药剂差异不显著;药种比为1∶70时防效分别为60.75%～78.35%和64.43%,显著低于药种比1∶50、1∶60和对照药剂。以上结果说明,10.4%吡虫啉·烯唑醇悬浮种衣剂对小麦蚜虫和纹枯病具有良好防治效果,最佳使用剂量为药种比1∶50～1∶60。

Control Effect of 10.4% Seed Coating of Imidacloprid and Diniconazole on Wheat Aphids and Sharp Eyespot

The control effect of 10.4% seed coating of imidacloprid & diniconazole on wheat aphids and sharp eyespot were studied with laboratory test and plot experiments,six treatments with different dose of Imidacloprid & Diniconazole and different ratio of seed to Imidacloprid or Diniconazole were used for winter wheat cultivar "Zhengmai 366".The results showed that no negative effects of the investigated pesticide on wheat germination,emergence and growth were observed when using the ratio of pesticide to seed as 1∶50~1∶70.The higher the dosage of the pesticide was,the better of the control effect was.The controlling effect on wheat aphids were 85.61%~97.71% and 80.15%~93.38% when the ratio of pesticide to seeds was 1∶50 and 1∶60,respectively,and there was no significant difference compared to the reference pesticide(600 g·L-1 Imidacloprid FS 1∶300).For the ratio of pesticide to seed of 1∶70,its control effect on aphids was 91.32%~94.91% at the initial stage of aphids attack.The effect was a little less than those of the pesticide to seed ratios of 1∶50 and 1∶60,and the reference pesticide.During the middle and late stages of aphids attack,the effect of pesticide to seed ratio of 1∶70 on aphids controlling was 74.88%~83.27%,which was significantly lower than that of the pesticide seed ratios of 1∶50 and 1∶60,and the reference pesticide.The effect of pesticide to seed ratio1∶50 on controlling wheat sharp eyespot and white head were 76.91%~86.64% and 78.29%,respectively,which was slightly higher than that of the reference pesticide(12.5% Diniconazole WP 1∶1 500).The effect of pesticide and seed ratio 1∶60 on controlling wheat sharp eyespot and white head was 69.14%~80.87% and 72.68%,respectively,which was significantly lower than the ratio of 1∶50,but no significant difference was observed compared to the reference pesticide.The effect of the 1∶70 treatment on controlling wheat sharp eyespot and white head was 60.75%~78.35% and 64.43%,respectively,which was significantly lower than the reference pesticide and the 1∶50 and 1∶60 treatments.Therefore,10.4% Imidacloprid & Diniconazole was an ideal pesticide on controlling wheat aphids and sharp eyespot.The best pesticide and seeds ratio was 1∶50-60.