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SMV田间侵染率是由田间迁飞着落的得毒蚜量决定的,是田间病株率和迁飞着落蚜量二者一定数量关系的组合。SMV流行程度取决于病害发生期田间侵染率的大小。所以应从降低初侵染水平并以一定的田间侵染率为指标推迟介体蚜虫盛发期控制SMV流行。田间SMV日侵染率超过1％病害便进入流行盛期。通过单位绿色诱盘捕获翅蚜量和当时的田间病株率实现了SMV田间日侵染率的预测。
The rate of SMV field infestation is determined by the amount of poisonous aphid that migrates in the field, and is a combination of the number of diseased plants in the field and the amount of migratory aphid population. The prevalence of SMV depends on the rate of field infestation at the time of the disease. Therefore, we should reduce the level of early infection and a certain rate of field infection as an indicator to delay the spread of aphids midwifty control SMV epidemic. Field SMV daily prevalence of more than 1% of the disease will enter the peak of the epidemic. The forecast of daily invader rate in SMV field was achieved by capturing the amount of winged aphid and unit plant rate in the field at the same time.