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播娘蒿是我县灌溉总渠以北棉旱区麦田主要恶性杂草,分布广、密度高、为害重。全县发生危害面积达17.49万亩,占三麦总面积的31.75％,其中严重受害面积6万多亩。一般田块密度为每平方尺10—20株,最高达百株以上,大面积减产一成左右,严重田块竟达三成以上,是影响我县三麦增产的重大障碍。 1982年以来,我县已将2甲4氯防除播娘蒿作为夺取三麦高产的一项技术措施,大面积
Sowing Artemisia annua is the main malignant weed in the wheat fields north of the irrigated canals in our county, with a wide distribution, high density and heavy damage. Hazardous area of the county reached 174,900 mu, accounting for 31.75% of the total area of three wheat, of which seriously affected area of 60,000 mu. The general plots density of 10-20 per square foot, up to one hundred or more, a large area cut about 10%, as many as 30% of the serious field plots, affecting the county three wheat major obstacle to increase production. Since 1982, our county has 2 A 4 chlorine control sowing Artemisia annua as a high measure to seize a technical measure, a large area