7种杀菌剂防治黄瓜白粉病田间药效评价

为筛选防治黄瓜白粉病的高效、低毒、安全杀菌剂,对戊唑醇等7种杀菌剂进行田间药效试验。结果表明:43%氟菌·肟菌酯SC 192.6 g/hm~2、300 g/L醚菌·啶酰菌SC 270 g/hm~2处理的防效较高,病指防效分别为88.69%和83.30%;430 g/L戊唑醇SC 96.75 g/hm~2、37%苯醚甲环唑WG 90 g/hm~2、36%硝苯菌酯EC 216 g/hm2处理的病指防效分别为78.75%、73.23%和74.55%;250 g/L嘧菌酯SC 337.5g/hm~2、250 g/L吡唑醚菌酯EC 150 g/hm~2处理的防效较差,病指防效分别为49.40%和47.78%。

Field Efficiency of Seven Fungicides for Controlling Cucumber Powdery Mildew

To screen excellent, low-toxicity and safe fungicides for controlling cucumber powdery mildew, seven fungicides were tested in field efficacy trials. The results showed that the field efficiencies of fluopyram + trifloxystrobin 43% SC 192.6 g/hm2 and kresoxim-methyl + boscalid 300 g/L SC 270 g/hm2 were high, the disease index control effects were 88.68% and 83.30%, respectively. The field efficiencies of tebuconazole 430 g/L SC 96.75 g/hm2, difenoconazole 37% WG 90 g/hm2 and meptyldinocap 36% EC 216 g/hm2 were 78.75%, 73.30% and 74.55%, respectively. The field efficiencies of azoxystrobin 250 g/L SC 337.5 g/hm2 and pyraclostrobin 250 g/L EC 150 g/hm2 were poor, the diseased index control effects were 49.40% and 47.78%, respectively.