五、繁缕Stellaria media,牛繁缕Malachium aquaticum 这是两种分布广,危害持续期长的旱田杂草,均属石竹科Caryophyllaceae植物。在分类上这两种杂草同为繁缕属Stellaria。现江苏植物志中已将牛繁缕另列一属称牛繁缕半属malachium。以上两种杂草除与作物争夺水份、养份、光照外,还是霜霉病,菌核病,番茄黑色环斑病毒的传播媒介,又是稻蓟马的越冬场所。据盐城农科所资料,在稻麦连作田中,以滋生牛繁缕为主,一般旱作地以繁缕较多。它们的主要区别如下表 V. Stellaria media, Malachium aquaticum This is the two widely distributed, endangerment of the long-term dry weeds, are Caryophyllaceae Caryophyllaceae plants. In the classification of these two weeds Stellaria Stellaria. Now Jiangsu plant chrysanthemum has another line of cattle is said to be a sub-genus malachium. In addition to the two weeds competing with crops for water, nutrients, light, or downy mildew, sclerotinia, tomato black ring spot virus vector, but also overwintering place of rice thrips. According to Yancheng Institute of Agricultural Science data, in the rice and wheat even as Tanaka to breed Niu Zhi-based, general dry land to more frequent chickweed. The main differences between them are as follows