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苏云金素处理后第3天智利小植绥螨和二斑叶螨幼螨的LC_(50)分别为211.33μg/ml和114.58μg/ml。两种雌成螨的产卵量第2天即明显减少,高剂量处理后3～4天,导致产卵停止。处理后第5天,智利小植绥螨和二斑叶螨成螨的LC_(50)分别为843.19μg/ml和279.88μg/ml。试验结果表明,苏云金素对两种幼螨是一种高效、无选择性的杀螨剂,对智利小植绥螨的卵和成螨毒性相对较低,但能抑制其雌成螨的产卵量,降低种群趋势指数,在释放智利小植绥螨期间应尽量避免用药。
LC 50 of the phytophagous Mites and Tetranychus urticae on the 3rd day after the treatment with triphenylmethylcellulose were 211.33μg / ml and 114.58μg / ml, respectively. The fecundity of two adult female mites decreased significantly on the second day, and the treatment lasted 3 to 4 days after the high dose treatment, resulting in the termination of spawning. On the fifth day after treatment, LC 50 of the phytophagous Mites and Chilean two-spotted mites were 843.19μg / ml and 279.88μg / ml, respectively. The test results showed that threonine is an efficient and selective acaricidal agent against both young mites and has relatively low toxicity to egg and adult mites of Chilean phytoseiid mites but inhibits the spawning of their adult mites Reduce the population trend index, during the release of Chilean phytoseiid mites should try to avoid medication.