烯啶虫胺对柑橘绣线菊蚜的室内杀虫活性及田间应用效果

Laboratory Activities and Field Application of Nitenpyram against Aphis citricola

[目的]通过室内毒力测定和田间试验评价10%烯啶虫胺可溶液剂对柑橘绣线菊蚜的防治效果。[方法]分别用Potter喷雾和常规喷雾法进行室内毒力测定和田间药效试验。[结果]10%烯啶虫胺可溶液剂和3%啶虫脒乳油对柑橘绣线菊蚜的LC50值分别为5.51、4.51 mg/L,两者毒力大体相当;10%烯啶虫胺可溶液剂质量浓度25 mg/L于药后1～14 d的防效达88.7%～100%,与3%啶虫脒乳油15 mg/L防效相当;质量浓度为15、20 mg/L的速效性稍差。[结论]10%烯啶虫胺可溶液剂是防治柑橘绣线菊蚜的理想药剂,在蚜虫种群密度较低时,推荐使用质量浓度为15～20 mg/L,在种群密度较高时使用25 mg/L,重点对新梢进行喷雾。

The objective of this experiment is to evaluate test the control efficiency of nitenpyram 10% SL against Aphis citricola by laboratory toxicity test and field trials.[Methods] Laboratory toxicity test and field trials were carried out by using Potter Tower method and routine spraying method in field.[Results] The indoor toxicity of nitenpyram 10% SL was equivalent to acetamipr 3% EC,and the LC50 values were 5.51 and 4.51 mg/L,respectively.The control activity of nitenpyram 10% SL reached 88.7 to 100% at the concentration of 25 mg/L in 1 to 14 days after treatment,which was similar to that of acetamipr.While a little lower at 15 and 20 mg/L.[Conclusions] Nitenpyram 10% SL is an effective steady and safe insecticide to control A.citricola.At initial period of A.citricola,when its density was low,15 to 20 mg/L of nitenpyram 10% SL was advised.When its density was high,the effective dosage was 25 mg/L.The key control could be conducted by spraying insecticide on shoot.