关键词: 黄胸散白蚁, 白蚁预防, 药物, 效果评价

Abstract:

Objective To evaluate the toxicity and repellent effects of 20% Tianying termiticidal emulsifiable concentrates, 5% bifenthrin suspension concentrates, 15% Wanjie termiticidal emulsifiable concentrates and 48% chlorpyrifos emulsifiable concentrates to Reticulitermes flaviceps, providing the basis for termite control. Methods The drug-impregnated filter method, toxic soil method and toxic soil pillar method were used to determine the toxicity and repellent effects of the four agents against R. flaviceps. Results Among the four tested agents, 48% chlorpyrifos emulsifiable concentrates and 5% bifenthrin suspension concentrates had the greatest contact toxicity to R. flaviceps. After 30 min of exposure to filters impregnated with 200 mg/L of them, the termite mortality reached 100% beyond 48 h. The second most toxic agent was 20% Tianying termiticidal emulsifiable concentrates, with 100% mortality beyond day 11 after treatment. The Wanjie termiticidal emulsifiable concentrates had the lowest toxicity to termites, with only 46.7% mortality beyond day 11 after treatment. All of the R. flaviceps in contact with the soil treated with ≥20 mg/L of any of the four agents died in 1 to 8 d. At a concentration of ≥200 mg/L, none of R. flaviceps could penetrate through a soil layer of 5 cm in thickness. Conclusion All of the four tested drugs can be used for termite prevention. In general, however, 20% Tianying termiticidal emulsifiable concentrates should be the agent of choice for the manufacturing industry.

Key words: Reticulitermes flaviceps, Termite prevention, Drugs, Evaluation