龙葵俗称黑天天,又名苦葵、野落苏、老鸹眼、狗奶子、野葡萄、天宝豆,属茄科一年生草本植物。龙葵广泛分布在全国各地,一年内能多次开花结实,在黑龙江普遍发生。主要为害玉米、花生、豆类、烟草、瓜类、蔬菜、薯类、棉花等农作物,其对玉米危害较重,一般造成玉米减产13%~23%。一、形态特征龙葵茎直立,分枝多,微有棱,无毛,一般株高30~100厘米。叶互生、有长柄;叶片卵形,质薄,先端渐 Solanum nigrum, commonly known as dark day, also known as Ku Kui, the wild Su, Laocan eye, dog milk, wild grapes, Tianbao beans, is an annual family of solanaceous herbs. Solanum is widely distributed throughout the country, many times within a year flowering strong, occurred in Heilongjiang. The main damage to corn, peanuts, beans, tobacco, melons, vegetables, potatoes, cotton and other crops, which are more harmful to corn, corn generally caused by a decrease of 13% to 23%. First, morphological characteristics Solanum stem erect, more branches, a little edge, glabrous, the general plant height of 30 to 100 cm. Leaves alternate, long-handled; leaf blade ovate, thin, apex gradually