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麦田杂草是影响小麦高产的主要障碍因素之一。多年来随着麦田肥水条件的不断提高,麦田杂草发生密度逐年加大,杂草种类不断变化,以荠菜、播娘蒿、婆婆纳为主的麦田,对磺酰脲类除草剂产生明显的抗药性。只有认真了解和掌握其变化规律,才能取得较好的防治效果。一、常见杂草种类及发生演变规律以西华县为代表的豫东南麦田,其土壤质地不同,杂草种类及优势种地也不相同。1.沙土、沙壤土区,阔叶杂草主要优势种为荠
Wheat field weeds are one of the main obstacles to the high yield of wheat. Over the years with the continuous improvement of fertilizer and water conditions in wheat fields, the density of wheat weeds increased year by year, the weed species constantly changing, shepherd’s purse, Sowing Artemisia, Veronica-based wheat fields, the sulfonylurea herbicides produced significant Resistance. Only by earnestly understanding and mastering the law of change can we achieve better prevention and cure effects. First, the common weed species and the evolution of laws to Xihua County, represented by the southeast of Henan wheat field, the soil texture is different, weed species and dominant species is not the same. 1 sandy soil, sandy loam area, the dominant species of broad-leaved weeds is chestnut