阿维菌素对黄胸散白蚁Reticulitermes speratus的毒效

在室内采用毒土法、滤纸法和毒土柱法测定了0.2%阿维菌素乳油对黄胸散白蚁的毒杀效果。 结果表明,阿维菌素对黄胸散白蚁的触杀作用速度较慢,在处理的96 h内,随时间推移毒性逐渐增强;黄胸散白蚁接触或取食药剂96 h后,其LC50值均低于20 mg/L;在供试条件下,用2.5 mg/L以上的浓度处理土壤,即能阻止黄胸散白蚁在土柱中的穿透,显示阿维菌素是一种值得进一步研究的白蚁预防药剂。

Toxicity of Abamectin against Reticulitermes speratus (Kolbe)

The toxic effect of 0.2% abamectin EC against Reticulitermes speratus was determined by filter paper method, toxic sand and toxic soil pillar in laboratory. The results indicated that active speed of 0.2% abamectin EC against Reticulitermes speratus was slower, the toxic effects increased gradually as the process of time within 96 h after treatment. The LC 50 value at 96 h was below 20 mg/L whether contacting with toxic sands or feeding filter paper treated by 0.2% abamectin EC. When the concentration of abamectin in solution for soil treatment was beyond 2.5 mg/L, the tunneling behavior of Reticulitermes speratus in toxic soil could be prevented in this experiment. The possibility of 0.2% abamectin EC for termite control in practice thus deserves to be further studied in the near future.