旱塬麦田生态系统蚜虫病毒病多目标综合防治策略研究  

STUDY ON MULTLI-OBJECTIVES INTEGRATED MANEGEMENT STRATEGY OF APHID AND VIRUS IN WHEAT FIELD ECOLOGY SYSTEM IN DRY PLATEAU

作　　者：赵惠燕[1] 汪世泽[1] 张改生[1] 

机构地区：[1]西北农业大学植保系

出　　处：《西北农业学报》1995年第1期44-50,共7页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家自然科学基金

摘　　要：调查了陕西渭北旱塬麦田生态系统中蚜虫、病毒病、天敌等时空动态与数量动态。采用多目标最优化方法分析了推迟播期、药剂拌种、适时防治、筛选抗性品种等综合措施对麦田生态系统的影响以及对蚜虫、病毒病的防治作用，制定了提高小麦产量的最佳策略。试验结果表明，系统中蚜虫与病毒病的田间时空分布图式相似，均为聚集分布，且随时间变化呈阻尼振荡规律或聚集强度衰减规律；蚜虫的数量动态为偏峰曲线，病毒病的数量动态为Ｌｏｇｉｓｔｉｃ曲线。药剂拌种与最佳播期、最佳防治时间以及优良抗性品种的结合明显减轻病虫危害，提高小麦产量。灵敏度分析证实了上述结论。The spatial and numerical dynamics of aphid, virus and natural enemy were investigated in wheatfield ecological system ih dry plateau. The effects of sowing time delaying,seed dressing,timely con-trolling,resistant varieties selecting and so forth on wheatfield ecological system and their controll func-tions were analysied by using the method of multi- objectives optimization.The optimum strategy ofraising yield was worked out. The results showed that the spatial patterns of aphid and virus in the sys-tem are alike,and both are aggregation. The intensity of aggregation is reducible or periodical dampingoscillatory with time changing.The numerical danymic of aphid is a slanting peak curve,and that ofvirus is a Logistic curve. The integration using of sowing time,seed dressing,timely controlling, resis-tant varieties selecting could reduce pest damage and raise yield.The results above were confirmed byusing sensitivity analysis.

关 键 词：小麦 蚜虫 病毒病 防治 麦田生态系统 旱塬 

分 类 号：S435.12[农业科学—农业昆虫与害虫防治]