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花县位于广东中部,水稻双季连作,早造以江矮早、矮脚南特;晚造以溪南、木泉等几个品种为主。三化螟一年发生五代,以第二代造成早稻白穗损失最大。1958年以后,由于大力兴修水利,改革耕作制度,为农业防治螟害创造了条件;并贯彻了综合防治措施,螟害率逐年下降。1958—1962年连续五年,螟害率均在0.5％以下;1963年遇到百年大旱,带来螟害的特大发生,经过及时防治,螟害率为1.33％。
Huaxian County is located in the middle of Guangdong. The rice is double cropped and even cultivated with early spring and short dwarf Nantes. Later, it was mainly made of Xixin and Muquan. Three generations of Borer occurred five generations a year, causing the second generation of white rice earliest loss of the largest. After 1958, due to vigorously water conservancy construction, reform of farming system, for the prevention and control of pests and diseases in agriculture to create the conditions; and implement a comprehensive prevention and control measures, the perennial rate of decline. For five consecutive years from 1958 to 1962, the rate of stem borer was less than 0.5%. In 1963, it encountered a hundred years of severe drought, which caused the pest occurrence. After timely prevention and control, the rate of stem borer was 1.33%.