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根据棉蚜、十一星瓢虫的生物学特性建立了具有不同虫龄结构和虫态的种群差分方程模型,利用新疆棉区十一星瓢虫对棉蚜捕食作用的调查和实验数据,确定了模型的各种参数,模拟了一个夏季92天内棉田棉蚜、十一星瓢虫数量的变化趋势.利用该模型,对不同温度、不同植株营养状况下十一星瓢虫的发育及对棉蚜的捕食状况进行了对比模拟计算.通过与实际调查数据对比分析,验证了模型的准确性和实用性.
Based on the biological characteristics of cotton aphid and eleven ladybugs, a population difference equation model with different insect age structures and insect states was established. Based on the investigation and experimental data on the predation of cotton aphid in eleven cotton fields, The parameters of the model were used to simulate the trend of cotton aphid and eleven ladybug numbers in a cotton field within 92 days in summer.This model was used to study the development of ladybird Aphid’s predation status was compared with the simulation calculation.Compared with the actual survey data, the accuracy and practicability of the model were verified.