鸭跖草俗称兰花草,别名三角菜、竹叶草、竹叶水草、淡竹叶、翠蝴蝶、蓝花草,属鸭跖草科一年生草本植物。一、分布与危害鸭跖草广泛分布于全国各地,在黑龙江三江平原普遍发生。主要为害水稻、小麦、玉米、高粱、马铃薯、红小豆、绿豆、大豆、花生、蔬菜、果园、甜菜、烟草、亚麻、苗圃等作物,其对玉米危害较重,一般造成玉米减产8%~19%。二、形态特征鸭跖草披散,多分枝,基部枝匍匐, Commelina, commonly known as orchids grass, alias triangular dishes, bamboo grass, bamboo leaves aquatic plants, light bamboo leaves, green butterfly, blue grass, is an annual herb Commelinaceae. First, the distribution and hazards Commelina is widely distributed throughout the country, occurred in the Sanjiang Plain in Heilongjiang. The main damage to crops such as rice, wheat, corn, sorghum, potatoes, red beans, mung beans, soybeans, peanuts, vegetables, orchards, sugar beets, tobacco, flax, nurseries and other heavy damage to corn, generally reduce corn yield by 8% to 19 %. Second, morphological characteristics Licorice grass loose, multi-branched, base branch creeping,