多功能生物制剂对黄瓜白粉病的防治效应

通过盆栽和田间药效试验,研究了多功能生物制剂多霸2对黄瓜白粉病的防治效应。盆栽试验结果表明,先施用多霸2的100、200倍液后接种病原菌,可显著提高黄瓜的抗病能力,降低发病率,防效达到72.0%和69.2%,差异极显著(P<0.01);先接种后喷药多霸2的100、200倍液,在一定程度上能抑制病原菌的扩展,也具有防治作用,相对防效达到26.5%和23.1%,差异显著(P<0.05)。田间调查表明,在黄瓜苗期开始施用或未发病前施用多功能制剂,能有效预防白粉病的发生,具有很好的防治效应。多霸2的100、200倍液对黄瓜白粉病的防效与清水对照和常用药剂粉锈宁相比,差异都达到显著或极显著水平。其中,多霸2的100倍液使用效果最好,优于200倍液。

Control effects of multifunctional biological agent on cucumber powdery mildew

The control effects of multifunctional biological agent Double2 on cucumber powdery mildew were tested in greenhouses and fields.The greenhouse trial results demonstrated that 100-fold and 200-fold Double2 were effective to the disease,and the disease index of the treatments was significantly reduced.The relative control efficacy of the treatments 'spraying before inoculation' was 72.0% and 69.2%,respectively(P<0.01),while that of the treatments 'spraying after inoculation' was 26.5% and 23.1%,respectively(P<0.05).The field trials showed that application of multifunctional biological agent at the seedling stage or before infection could effectively control powdery mildew.The relative control efficacy of 100-fold and 200-fold Double2 was more significant than that of other chemical drugs.The control effect of 100-fold Double2 was superior to that of 200-fold Double2.