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应用离散性指标对豌豆潜叶蝇在采种大白菜田的分布进行了研究,结果表明:幼虫、蛹和种群均为聚集分布.聚集均数(λ)值分析表明:聚集的原因主要是由昆虫行为引起的。豌豆潜叶蝇种群的理论抽样数公式为:N=1681.25/x+0.3075.
The results showed that the larvae, pupae and the population were all aggregated and distributed.The results of aggregation mean (λ) showed that the main reason for the aggregation was that insects Caused by behavior The theoretical sampling number of pea leafminer population is N = 1681.25 / x + 0.3075.