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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 temporal dynamics and quantity dynamics of aphids, virus diseases and natural enemies in the wheat field ecosystem in Weibei dry-land of Shaanxi Province were investigated. The multi-objective optimization method was used to analyze the effects of comprehensive measures such as postponed sowing date, seed dressing, timely control and selection of resistant varieties on wheat ecosystem and the prevention and control of aphids and virus diseases, Strategy. The experimental results show that the spatiotemporal distribution pattern of aphids and virus diseases in the system is similar and all are aggregated and distributed, and the law of damping oscillation or the decay of aggregation intensity changes with time. The number of aphids is a partial peak curve and the number of virus diseases Dynamic for the Logistic curve. The combination of medicament dressing with the best sowing date, the best time for prevention and control and the combination of excellent resistant varieties obviously reduce the pests and diseases and increase the yield of wheat. Sensitivity analysis confirmed the above conclusion.