氯氟氰菊酯与阿维菌素增效混配制剂对美洲斑潜蝇的防治效果

低毒化学杀虫剂氯氟氰菊酯与生物源农药阿维菌素混配，通过其对美洲斑潜蝇室内毒力实验，测定共毒系数CTC为161～232，处于明显增效范围内。据此确定最佳配比，配制此增效混剂2%渗透型可湿性粉剂。在北京、山东两地防治美洲斑潜蝇幼虫的田间试验表明药效优良，制剂用量50 g/667m²药后3、7、11天两地区校正防效分别为85.26%～90.76%和86.74%～94.02%，制剂用量25g/667m2两地区相应防效分别为75.28%～85.17%、79.96%～88.68%。该增效混剂防治斑潜蝇速效性和持效性皆佳，成本有所下降，使用可湿粉与乳油相比较，可减少投放入环境的化学品数量，以减少环境污染。

The efficacy of a synergistic mixture of cyhalothrin and abamectin in the control of Liriomyza sativae Blanchard

The co toxicity and co efficiency (CTC) of a mixture of abamectin as a biological pesticide and cyhalothrin as a chemical insecticide with low toxicity to mammals was determined with respect to Liriomyza sativae Blanchard. CTC of this mixture was equal to 161-232 in a range of marked synergism. According to the maximum of the proper proportion of cyhalothrin to abamectin, a 2% permeated WP synergistic formulation was manufactured. In the field trials the efficacy of this 2% WP against L. sativae larvae was excellent in both Shandong and Beijing districts. For example, at an application rate of 507g/667m2, corrected mortality in each zone after 3, 7 and 11 days was 85.26%-90.76% and 86.74%-94.02% respectively. At 25g/667m² the corresponding control effects were 75.28%-85.17% and 79.96%-88.68% respectively. This synergistic mixture was fast acting, had good residual performance and was relatively cost effective. Another advantage of using WP over EC pesticides is that a markedly less amount of chemicals are released into the environment, thereby decreasing pesticide pollution.