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[目的]明确联苯肼酯对害螨的致死效应。[方法]采用Potter喷雾塔分别喷施并比较不同浓度联苯肼酯在不同药量下对朱砂叶螨的杀螨活性差异。[结果]喷施0.1~3.0 m L的联苯肼酯药液在叶片上的沉积量随着施药量的增加而显著递增,二者呈线性正相关关系,平均沉积量介于0.60~13.61μL/cm2;100、50 mg/L的联苯肼酯在0.2~3.0 m L的药量范围内对朱砂叶螨的死亡率无显著性差异,即不受施药量及沉积量的影响;而3.125~25 mg/L的联苯肼酯对朱砂叶螨的死亡率随药量和沉积量的增加而显著增加,呈线性正相关关系;不同药量范围的联苯肼酯对朱砂叶螨的LC50与药量及沉积量间呈幂函数关系,其LC_(50)值随药量及沉积量的增大而显著减小。[结论]联苯肼酯对害螨存在明显致死剂量效应。
[Objective] To determine the lethal effect of bifenazate on pest mites. [Method] Potter spray tower was used to spray and compare different concentrations of bifenazate esters in different dosages of Tetranychus cinnabarinus mite mite activity differences. [Result] The results showed that the amount of Biphenylhydrazide solution sprayed on the leaves increased sharply with the increase of the dosage of Biphenylhydrazide solution. The linear correlation was found between them. The average deposition was between 0.60 and 13.61 μL / cm2. There was no significant difference in the mortality rate of Spinodryon tetranychus between 100 and 50 mg / L of Bifenazate ester in the range of 0.2-3.0 mL, that is, However, the mortality of Tetranychus cinnabarinus with 3.125 ~ 25 mg / L of bifenazate significantly increased with the increase of dose and deposition, and showed a linear positive correlation. The LC50 showed a power function relationship with the amount of drug and the amount of deposition. The value of LC 50 decreased with the increase of the amount of drug and deposition. [Conclusion] Bifizinafine had obvious lethal dose effect on harmful mites.