噻唑膦微囊悬浮剂对南方根结线虫的防治效果

Control Effect of Fosthiazate Microcapsule Suspension on Meloidogyne incognita

本试验采用室内浸虫法测定了噻唑膦对山东省济南市济阳区、泰安市岱岳区等地大棚内南方根结线虫(Meloidogyne incongnita)的毒力,发现噻唑膦对南方根结线虫的LC50在4.18~5.86 mg·L^(-1)之间。田间采用单株灌根法比较了30%噻唑膦微囊悬浮剂与5%噻唑膦微乳剂两种剂型对根结线虫的防治效果,发现施药后30 d,两种药剂的田间防效相差不大,均在80%以上;施药后60 d和90 d,30%噻唑膦微囊悬浮剂的防效则均显著或极显著优于5%噻唑膦微乳剂。表明30%噻唑膦微囊悬浮剂能够有效延长持效期,从而减少施药次数,减少用药量,保障农产品安全。

This experiment measured the toxicity of fosthiazate aginst Meloidogyne incognita at greenhouses in Jiyang District of Jinan City and Daiyue District of Taian City of Shandong Province using indoor insect-dipping method,and discovered that the toxicity of fosthiazate aginst Meloidogyne incognita was between 4.18-5.86 mg·L^(-1).In the fields,single plant root irrigation method was employed to compare the control effects of 30% fosthiazate microcapsule suspension concentrate and 5% fosthiazate microemulsion on root knot nematodes.It was found that both formulations achieved over 80% control effects 30 days after application.As for control effects 60 days and 90 days after application,the 30% fosthiazate microcapsule suspension was significant or extreme significant suerior to that of 5% fosthiazate microemulsion,indicating that 30% fosthiazate microcapsule suspension could effectively prolong its efficacy duration,thus reducing the application times and dosage,and ensuring the safety of agricultural products.