摘要
为了筛选对朱砂叶螨具有较高杀螨活性的药剂,通过浸叶法测定和比较了螺虫乙酯等5种药剂对朱砂叶螨的毒力并两两组合筛选防治效果较好的增效混剂.结果表明:以常用杀螨剂哒螨灵作为标准杀虫剂,螺虫乙酯等4种杀虫剂对朱砂叶螨的24 h和48 h毒力均高于哒螨灵,其中乙螨唑的毒力最高,其次为多杀菌素,第3和第4分别是螺虫乙酯和联苯肼酯;在不同组合增效复配剂的筛选试验中,螺虫乙酯与乙螨唑的两种配比(3.2∶1和1∶1.25)混剂的共毒系数分别为359.33和419.98,哒螨灵与联苯肼酯配比5.6∶1的混剂的共毒系数为221.98,多杀菌素与乙螨唑配比4.8∶1的共毒系数为550.90,增效作用最明显;相比于单剂,4种混配组合均有明显的增效作用,具有一定的开发应用前景.
Abstract
In order to screen insecticides with high acaricidal activity,the toxicities of 5 kinds of insecticides,including spirotetramat to Tetranychus cinnabarinus,were measured and com-pared by the leaf-dipping immersion method,and a synergistic mixture with better control effect was screened in pairs.The results showed that using the commonly used acaricide pyridaben as the standard insecticide,the toxicities of four insecticides,including spirotetramat,to Tetranychus cinnabarinus at 24 and 48 hours were higher than that of pyridaben,among which,the toxicity of etoxazole was the highest,that of spinosyn was the second,and the third and forth were spirotetramat and bifenazate,respectively.In the screening experiments of different combinations of synergistic agents,the co-toxicity coefficients of the mixed comple-xes of spirotetramat and etoxazole(3.2∶1 and 1∶1.25)were 359.33 and 419.98,respective-ly,and that of the mixed complexes of pyridaben and bifenazate(5.6∶1)was 221.98.The co-toxicity coefficients of the mixed complexes of spinosyn and etoxazole(4.8∶1)was 550.90,indicating the most significant synergistic effect.Compared to single agents,all four mixed combina-tions had significant synergistic effects and had certain development and application prospects.
基金项目
江苏省种业振兴"揭榜挂帅"项目(JBGS[2021]074)
维普
万方数据