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繁缕(Stellaria media)不仅发生于上海郊区的麦田,且为冬春菜田的主要杂草之一。它的种子数量多,休眠期长,植株的茎纤弱,着地后的每个茎节都能生根,并从叶腋萌发产生新的植株。这种杂草能感染黄瓜花叶病毒(CMV)、芜青花叶病毒(TuMV)和烟草花叶病毒(TMV)等等。对CMV来讲,它能由种子或蚜虫传播,又极易摩擦接种,而且种子带毒率和自然感病率又较高,尤其是在田间长期竞争和选择下,繁缕对该病呈非显性感染,不易引起人们重视。可见,繁缕是CMV等的一种非常重要的越冬寄主。因此。铲除繁缕等杂草,切断毒源,对控制植物病毒病(特别是CMV)有着不可忽视的实际意义。
Stellaria media occurs not only in the wheat fields on the outskirts of Shanghai but also as one of the major weeds in winter and spring fields. It has a large number of seeds, long dormancy periods, weak stems of plants, and rooting at every stem node after planting, and new plants emerge from leaf axils. This weed can infect cucumber mosaic virus (CMV), turnip mosaic virus (TuMV) and tobacco mosaic virus (TMV) and so on. For CMV, it can be spread by seeds or aphids, and easily friction vaccination, and the rate of seed poisoning and natural high incidence, especially in the field of long-term competition and choice, Dominant infection, not easy to arouse people’s attention. Visible, chickweed CMV is a very important wintering host. therefore. Eradication of weeds and other cuttings, cut off the source of the virus, the control of plant virus disease (especially CMV) has a practical significance can not be ignored.