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本文研究的是在林间自然条件下,施用灭幼脲Ⅲ号(Dimilin-3)胶悬剂防治马尾松毛虫(Dendrolimuspunctatus),药剂在林间松针上的残留动态及残效期。试验结果表明,林间用300ppm浓度的灭幼脲Ⅲ号胶悬剂在松针上的消解方程为C=46.44325E-0.0145t,半衰期为47.8天,药剂在松针上的即时附着量为53μg/kg。它对第1代马尾松毛虫1龄幼虫的持效期为40~50天,第2代30~40天,第3代长达56天以上。
In this paper, we studied the residual activity and residual period of Dendrolimus punctatus and its agents on pine needles in the forest under the natural conditions of Dimilin-3. The test results showed that the digestion equation of pineapple with 300ppm diflubenzuron Ⅲ suspension was C = 46.44325E-0.0145t, the half-life was 47.8 days, the instant attachment of the agent on the pine needles 53 μg / kg. It is the 1st instar Dendrolimus punctatus larvae of the first instar 40 to 50 days, the second generation of 30 to 40 days, the third generation up to 56 days or more.