Control effect evaluation of 20% cyflumetofen suspension agent against Panonychus citri

【Objective】The aim of this experiment was to explicit the control effect and application technique of cyflumetofen against Panonychus citri, and its security for citrus, subsequently provide scientific references for P. citri prevention and treatment. 【Method】Four different treatments of 20% cyflumetofen suspension agent (2500, 2000, 1500, 1000 dilution times) were prescribed to compare their effects with recommended levels of common chemical pesticides (73% Propargite missible oil 240 g/L Envidor suspension agent) and controls. Comparison parameters involved population cardinal number before pesticides and control effect after spraying 3, 7, 15, 30 d. Experiments were repeated for two years. 【Result】The control effect of cyflumetofen 20% SC against P. citri was 98.80%-100.00% on the 30th day with the dilution times of 1500-2000, which was significant higher than that of control pesticides. Besides, cyflumetofen was safe to citrus and had no negative impacts on other non target creatures. 【Conclusion】Thanks to good control effect, cyflumetofen with the dilution times of 1500-2000 could be applied prior to peak time when the population density of P. citri in field was five per leaf.