两种微生物杀线剂联合噻唑膦对西瓜根结线虫病的防治效果

Control Effects of Two Bio-nematicides Combined with Fosthiazate on Watermelon Root Knot Nematode Disease

为减少化学杀线虫剂用量,有效控制温室西瓜根结线虫病害的发生,本试验开展黑曲霉Y61菌剂、产紫青霉MH111菌剂与噻唑膦混合使用对西瓜根结线虫的温室防治效果试验。结果表明:处理1(黑曲霉Y61菌剂+噻唑膦颗粒剂)、处理2(黑曲霉Y61菌剂+噻唑膦颗粒剂+地牛)、处理3(产紫青霉MH111菌剂+噻唑膦颗粒剂)、处理4(产紫青霉MH111菌剂+噻唑膦颗粒剂+地牛)、处理5(噻唑膦颗粒剂)和处理6(清水对照)6个处理,药后90 d土壤中根结线虫2龄幼虫数量与施药前线虫数的增长率为122.0%~415.0%。药后90 d各处理防治效果分别为67.8%、73.1%、55.5%、61.6%和70.9%。药后90 d各处理增产率分别为25.5%、31.2%、19.7%、22.1%和23.5%。将噻唑膦与生物菌剂混合使用对西瓜根结线虫病害具有良好防效,可作为西瓜根结线虫病害防治的方法进行推广。

In order to reduce the dosage of chemical nematicides and effectively control the ocurrence of watermelon root knot nematode diseases in greenhouses,the efficiency of mixed application of Aspergillus niger Y-61,Penicillium purpurogenum MH-111,and fosthiazate to control watermelon root knot nematode diseases was evaluated in the greenhouse conditions in this study.The results showed that the root knot nematodes in the soil 90 days after treatment,the increase ratio of root knot nematode number after application to that before application of six treatments was 122.0%-415.0%.The control effects of each treatment at 90 days after treatment were 67.8%,73.1%,55.5%,61.6%and 70.9%,respectively.The yield of each treatment increased by 25.5%,31.2%,19.7%,22.1%and 23.5%at 90 days after treatment.The mixed use of fosthiazate and biological inoculants had a good control effect on watermelon root knot nematode diseases and increase watermelon yield in controlling root knot nematode,and could be as a method for the prevention and controlling of watermelon root knot nematode diseases.