大黄炭疽病药剂防治田间试验初报

用6种药剂进行大黄炭疽病的田间防治试验,为大黄种植企业、专业合作社,种植大户在防治大黄炭疽病提供参考依据,结果表明25%吡唑·醚菌酯对大黄炭疽病防治效果最好,防效达92.67%,其他依次25%嘧功酯、70%甲基硫菌灵、80%代森锰锌、50%多功灵、43%戊唑醇,防效为84.87%、80.72%、78.31%、68.23%、65.14%。

A Preliminary Study on Control Efficiency of New Nicotine Biopesticides against Pomegranate Aphids

In this study, toxicity and control efficiency of three nicotine biopesticides against pomegranate aphids were determined via indoor toxicity test and field effica- cy test, aiming at screening the appropriate reagent for prevention and control of pomegranate aphids. The results of indoor toxicity test showed that LC^o of reagent 1, reagent 2 and reagent 3 reached 10 270, 12 810 and 13 040 mg/L, respectively. The results of field efficacy test showed that control efficacy of reagent 1, reagent 2 and reagent 3 reached 60.52%, 34.60% and 46.99%, respectively. Overall, reagent 1 （91% ultrafine powder of tobacco leaves, 3% silicone oil, 2% sasangua cake, 2% emulsifier, 2% ascorbic acid） exhibited the highest control efficiency against pomegranate aphids, which can be further popularized and utilized.