河北省常年种植冬小麦250万hm2。长期以来,并未发现节节麦(A egilops squarrosa L.)、雀麦(B rom us japonicus Thunb.)等禾本科杂草在麦田造成危害。2001年,在盐山县麦田首次发现节节麦危害;2002年,在定州市麦田首次发现雀麦危害。从全省调查结果看,目前常发性杂草仍以播娘蒿 Hebei Province perennial planting of 2.5 million hm2 of winter wheat. For a long time, we did not find that gramineous weeds such as A egilops squarrosa L. and Bromus japonicus Thunb. In 2001, it was the first time to find the harm of Festival wheat in the wheat field of Yanshan County. In 2002, the first discovery of the damage of the bird was in the wheat field of Dingzhou City. From the survey results of the province, the current weeds are still sowing Artemisia annua