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粟穗螟Mampara bipunctella Ragonot在泸县的主要寄主是高粱。一年发生两代。以第二代老熟幼虫随高粱进入室内越冬。翌年4月下旬开始化蛹,极少数发育至第三代3龄幼虫而死亡,为不完全三代。药剂防治指标为穗虫量2头以上。幼虫田间动态分布为负二项分布和切尾负二项分布。防治指标序贯抽样方案为d_0=1.42n-13.47,d_1=1.42n+13.47。发生程度序贯抽样方案为d_0=2.44n-34.88,d_1=2.44n+34.88(轻与中);d_1=4.87n-62.14,d_2=4.87n+62.14(中与重)。防治重点是越冬幼虫,田间用20％BT乳剂或25％杀虫双防治效果良好。
The main host of Mampara bipunctella Ragonot in Lu County is sorghum. Two generations a year. The second generation of mature larvae entered the interior with winter sorghum. Pupae began to germinate in late April of the following year, and few developed to the third generation of 3rd instar larvae, resulting in incomplete three generations. Pharmacy indicators for the prevention and treatment of earworms 2 or more. The dynamic distribution of larvae field is negative binomial distribution and negative tail distribution. The sequential sampling plan of control index is d_0 = 1.42n-13.47, d_1 = 1.42n + 13.47. The degree of occurrence of sequential sampling program for the d_0 = 2.44n-34.88, d_1 = 2.44n + 34.88 (light and medium); d_1 = 4.87n-62.14, d_2 = 4.87n +62.14 (with weight). Control focus is overwintering larvae, field with 20% BT emulsion or 25% insecticidal double control effect is good.