四种农药两种处理方法对红火蚁工蚁作用的室内筛选
A bioassay for screening the toxicity of baits to control the red imported fire ant
张 震1, 2** 何晓芳1***
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DOI：10.7679/j.issn.2095-1353.2015.169
作者单位：1. 华南农业大学农学院昆虫学系，广州 510642；2. 广东中烟工业有限责任公司，广州 510620
中文关键词：红火蚁，触杀作用，胃毒作用
英文关键词：red imported fire ant, contact toxicity, oral toxicity
中文摘要： 【目的】 为探讨及筛选对红火蚁Solenopsis
invicta Buren工蚁高效低毒的药剂，以应用于红火蚁的化学防治。【方法】 本试验采用胃毒、药膜法测定阿维菌素、甲维盐、辛硫磷、高效氯氰菊酯4种农药对红火蚁工蚁的室内毒力测定。【结果】 辛硫磷对红火蚁工蚁的胃毒LC50值最小，为3.42×10-4 mg/mL；而甲维盐对红火蚁工蚁的触杀LC50值最小，为2.56×10-5 mg/mL。【结论】 红火蚁工蚁对辛硫磷、甲维盐较为敏感。甲维盐作为以阿维菌素为原料经过化学修饰而得到的一种高效杀虫剂，利用红火蚁“交哺习性”进行传毒,作为胃毒饵剂具有较好的前景。
英文摘要：[Objectives] To control the red imported fire ant, Solenopsis invicta, toxicities of four insecticides were evaluate and screenedin laboratory. [Methods] The contact and oral toxicities of phoxim, beta-cypermethrin, emamectin benzoate and abamectin against worker ants of the red imported fire ant, and their toxic regression equations, were evaluated in the laboratory. Totally, five concentrations and four treatment duration (12, 24, 48 and 72 h) for each insecticide were used to test by five repeats. [Results] The results show that the all the corrected mortalities were increasing by increasing of the concentrations and the treatment durations among the four insecticides. The minimum LC50 values of phoxim and emamectin benzoate were 3.42×10-4 mg/mL and 2.56×10-5 mg/mL, respectively. [Conclusion] The results suggest that the red imported fire ant is sensitive to phoxim and banleptm. Banleptm, a chemically modified avermectin, is not only be transferred by between worker ants, but also shows a promising prospects as an orally ingested bait.