一、野燕麦发生与危害: 野燕麦适应性强,繁殖蔓延快,控制不当,危害逐年加剧。估计全国约有6千万亩农田受害,每年损失粮食约15-20亿斤。 1.春麦区:西北、东北等春麦区,于3—4月小麦出苗后3—7天相继出苗;苗期生长慢,后期快,6月出穗,7—9月陆续成熟, First, the occurrence and damage of wild oats: wild oats strong adaptability, propagation spread quickly, improper control, the harm intensified year by year. It is estimated that about 60 million mu of farmland have been harmed throughout the country, losing about 15-20 billion jin of grain each year. 1. Spring wheat area: northwest, northeast and other spring wheat areas, 3-7 days after the emergence of 3-7 days after emergence of wheat seedlings; seedling growth slow, fast late, a spike in June, 7-9 months after another maturity,