摘要
为减少化学农药的使用量,延缓抗药性,实现化学农药的减量增效,我们探讨了阿维菌素分别与吡虫啉、啶虫脒和氟啶虫胺腈复配对麦蚜的联合毒力。结果表明,阿维菌素与吡虫啉有效成分比3∶1,13∶9,1∶2,1∶4,1∶7时,其共毒系数分别为148.2,152.6,132.2,156.2,157.3,最佳配比为1∶7,其LC_(50)为0.485μg/mL;阿维菌素与啶虫脒有效成分比15∶1,5∶2,1∶1时,其共毒系数分别为155.3,198.9,139.1,最佳配比为5∶2,其LC_(50)为0.255μg/mL;阿维菌素与氟啶虫胺腈有效成分比2∶1,1∶3,10∶19,其共毒系数分别为241.3,176.3,206.4,最佳配比2∶1,其LC_(50)为0.222μg/mL。不同药剂以增效显著的配比混配使用,为麦蚜的有效防治和农药的减量使用提供了更好的途径。
To delay resistance, achieve reduction and synergization of chemical insecticides, we explored co-toxicity of abamectin with imidacloprid, acetamiprid and sulfoxaflor against Schizaphis graminum on wheat. The results indicated that co-toxicity coefficient(CTC) was 148.2, 152.6, 132.2, 156.2 and 157.3 when the proportion of active ingredients of abamectin and imidacloprid was 3∶1, 13∶9, 1∶2, 1∶4 and 1∶7, respectively, of which the proportion of 1∶7 had the highest co-toxicity, with the LC_(50) value of 0.485 μg/mL. CTC was 155.3, 198.9 and 139.1 when the proportion of active ingredients of abamectin and acetamiprid was 15∶1, 5∶2 and 1∶1, respectively, of which the proportion of 5∶2 had the highest co-toxicity, with the LC_(50)value of 0.255 μg/mL. CTC was 241.3, 176.3 and 206.4 when the proportion of active ingredients of abamectin and acetamiprid was 2∶1, 1∶3 and 10∶19, respectively, of which the proportion of 2∶1 had the highest co-toxicity, with the LC_(50) value of 0.222 μg/mL. All the proportions above had significant synergism. This study provided important theoretical basis for overcoming or delaying the resistance, reducing the cost and improving the control efficacy on wheat aphids.
引文
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