Applying Hot Fogging Concentrate to Control Locusta migratoria manilensis（Meyen）

Key words: 
• Locusta migratoria manilensis（Meyen） /
• applying hot fogging concentrate /
• efficacy

Abstract: Hot fogging concentrate （1 500—3 000 mL·hm^-2） were used to control Locusta migratoria manilensis （Meyen） in abandoned land and sugarcane grassland in the western in Hainan island,the method of sampling basket combining with visual counting were used to investigate its efficacy,and the testing inside the cages was used as circumstantial evidence. The cage test results indicated that the reduced rate of revision insects was 92.75%—100% at the 3rd day; The field plot test results indicated the population declined significantly after 1 day,reduced by above 62.51%—95.87% after 7 days,and the control efficacy maintained between 62.38%—82.51% after 15 days,while CK was only 40.32%—46.23%. The results of extra 1700 hm² field trials showed the locusta population reduced 78.27%—97.52% after 7 days under the dose of 1 500—3 000 ml·hm^-2. These data suggested that applying hot fogging concentrate could be used for the urgent controlling of grasshoppers.