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应用最优分割法研究了四川高粱穗部害虫群落的时间变化。根据主要害虫的消长动态,将其分为高果始穗至始穗后5天、6～20天、21天至成熟3个有序阶段,并结合高粱生育期,揭示了各阶段害虫群落发生特点及防治策略。
The optimal partition method was used to study the temporal variation of spike pest community in Sichuan sorghum. According to the dynamics of the main pests, they were divided into three stages, ie, high-bearing ear initiation to 5 days, 6 to 20 days, 21 days to ripening stage, and combining with the growth period of sorghum, the occurrence of pest community in each stage was revealed Features and Prevention Strategies.