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本文研究了江苏太湖单季晚稻区影响褐飞虱田间种群数量变动的有关生物学参数:卵孵化率80％,若虫存活率18.6％,成虫寿命8天,其不同日龄个体产卵量模型为E=(12.54Ⅰ—25.4)C/100,水稻抽穗后长翅型成虫迁出比例从20％逐渐增至95％。在25℃条件下,取食孕穗期水稻的褐飞虱长、短翅型成虫繁殖倍数分别为9.8倍和13.3倍。应用以上研究结果,将褐飞虱实验种群动态模型改建成田间种群动态模型,用以预测褐飞虱田间种群数量的消长。
In this paper, we studied the related biological parameters affecting the population dynamics of BPH in the single cropping rice region of Taihu Lake in Jiangsu Province. The egg hatching rate was 80%, the nymphs’ survival rate was 18.6% and the adult life span was 8 days. (12.54 I-25.4) C / 100, the percentage of migrating long-winged adults after rice heading gradually increased from 20% to 95%. At 25 ℃, the multiplication rates of long and short-winged adults of BPH fed on booting rice were 9.8 and 13.3 times, respectively. Based on the above results, the dynamic model of BPH experiment population was transformed into the field population dynamics model to predict the population growth and decline of BPH.