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本市地处苏北沿海,九十年代前,稗草、莎草是稻田的主要草害类群,每平方米密度高达500余株,水稻前期几乎与秧苗竞相生长,莎草占种群密度的70%以上。成为夺取水稻高产的严重障碍,但近年来,鲤肠密度上升迅猛,由90年前每平方米0.11株上升到目前20余株,与水稻争光争肥矛盾较为突出。为筛选出广谱高效一次性除草剂,97年本站在水稻移栽初期对10%吡嘧磺隆、20%乙草胺等四种粉剂除草剂进行了筛选试验。
The city is located in the coastal areas of northern Jiangsu Province. Before 1990s, barnyardgrass and sedge are the main grass pests in paddy fields. The density per square meter is as high as 500 plants. The rice plants competed with seedlings almost at the early stage, and sedge accounted for 70 %the above. However, in recent years, the intestinal density of carp has risen rapidly from 0.11 strains per square meter 90 years ago to more than 20 strains at present. The contradiction between competing with rice and competing with rice is more prominent. In order to screen out a broad-spectrum and highly effective one-time herbicide, we selected four kinds of herbicide such as 10% pyrazosulfuron and 20% acetochlor in the early stage of rice transplanting.