Dachai is one of the main weeds in rapeseed field. If it is not timely prevented after a large number of occurrences, it will have a great impact on the yield of rapeseed. At present, in the herbicides used to control broad-leaved weeds in stems and leaves of rapeseed fields, the efficacy of propylfenstera and isopropyl-fenonyl ether on weeds such as big broccoli is poor; and the efficacy of ethametsulfuron on big celery is controlled. Better, but it is easy to produce phytotoxicity on post-planting rice and dry crops such as cotton, corn, melon, and beans. Our province has banned it; the new product of clopyralid has good effects on weeds such as big rapeseed in rape fields. Control effect can be selected. At present, the products of clopyralidic acid that have been registered in the country include Dragon Boxing (75% clopyralid soluble granules) from Dow AgroSciences and Buickgrass 2 from Sichuan Lier Chemicals (telephones) ( 30% clopyralid water) etc. Longquan is a synthetic hormone herbicide that is absorbed mainly by weed stems and leaves, transmitted through the phloem and xylem, and causes weeds to die with hormonal symptoms. Drugs can be transmitted through the xylem to the roots, thus killing perennial deep-rooted weeds. Effectively control Amaranthaceae weed chives, rice leeks, oysters, oysters, Tibetan mastiffs, rosettes, chamomile, sunflowers, Erigeron, mandala, Bidens, ragweed, chamomile, Mao Lin Cai, European Senecio, Xanthium, etc., leguminous weeds, tubers, sweet peas, trifolium, acacia, self-produced legumes, solanaceous weeds, solitary weeds, etc. , Umbelliferous weeds, etc. Symptoms of sensitive broad-leaved plants are mainly as follows: the stem is twisted and curled; the leaves are cup-shaped, wrinkled, or accompanied by reversal; the roots are thickened and the root hairs are stunted; the stem tips become needle-like; the stems are brittle and easily broken Or rupture; a large number of root meristem proliferation; stems, roots with pods, growth inhibition of roots and shoots. Longquan is used in rapeseed field to control broad-leaved weeds such as rice leeks, big broccoli, tuber sweet peas, and curly-grass pods. It also has good effects on perennial broad-leaved weeds such as burrowing vegetables and chives. In general, 6-10 grams of water is sprayed with 20-30 kg of water per acre. Control the annual broad-leaved weeds in the weeds at the 3-6 leaf stage, using the recommended low amount; control the weeds in the weeds with 4 leaves and then apply them before bud formation, using the recommended high amount. Combine Dragon Fist (6-10 grams per acre) with Gotemak (Grass Remover) to remove common weeds such as swine fever, common fleas, cockroaches, and fleas; Such as the use of mixed dosage, can control grass weeds at the same time. Weeds grow poorly in droughts, flooded fields, high temperatures, or low temperatures, and their effects on control will be affected. In terms of safety, Dragon Fist can only be used in cabbage and cabbage rape fields and cannot be used in mustard rape fields, otherwise it is prone to phytotoxicity. It is safe to use rapeseed from the seedling stage to budding stage, but it is better not to use it after convulsions in rape to avoid phytotoxicity. Dragon boxing has a moderate duration in the soil, and most post-planting crops will not cause phytotoxicity after 10 months of application of Dragon Punch. Related research shows that Dragon Fist can be used in barley, wheat, oats, corn, cruciferous vegetables, asparagus, beets, flax, mint, strawberry and other crop fields and grass turf to prevent broad-leaved weeds, and pesticide application can be adapted to local conditions. In the crop sowing soil before sowing, post-planting seedling spray and post-emergence spray stem and leaf treatment methods. Chloropyridine is not easily digested in some plants. For example, corn and wheat fields used Longquan after straw or corn stalks to make compost or straw to return can cause excessive accumulation, affecting the aftermath, should pay attention when using. Tobacco Enzymes,enzyme for tobacco,Enzyme for Tobacco Fermentation,enzyme for cigarette Sunson Industry Group Co., Ltd , https://www.sunsonchinaenzymes.com