1, atrazine
Atrazine is a selective herbicide before and after seedling. Since 1958 was developed and produced by Cargill, Switzerland, it has been widely used in corn production for more than 60 years. Because of its wide weeding range, clean weeding, good safety, low price and convenient use, it has become one of the most used herbicides in the world. It can effectively control dozens of weeds such as crabgrass, barnyard grass, green bristlegrass, sedge, milkweed, Polygonum, Chenopodium, Cruciferae and Leguminosae. Because of its good miscibility, atrazine is often mixed with nicosulfuron, mesotrione and other post-emergence herbicides to prolong the application period and improve the weeding effect.
2. Nicosulfuron
Nicosulfuron is a herbicide for stem and leaf after seedling. Since it was registered and listed in China at the beginning of this century, it has become one of the most widely used post-emergence herbicides because of its outstanding advantages such as high activity, good weeding effect, high safety and low price. In order to expand the weeding scope and improve the weeding effect, nicosulfuron is often mixed with other herbicides such as atrazine. Can effectively control barnyard grass, wild oats, Setaria viridis, Sargassum, cattail, wild millet, Polygonum perfoliatum, Polygonum perfoliatum, Polygonum perfoliatum, Amaranthus retroflexus, Solanum nigrum, Elsholtzia Elsholtzia, spinosad, shepherd's purse and Cangshan. Sweet corn and popcorn are sensitive to this chemical and cannot be used.
3, mesotrione
Mesotrione is a triketone herbicide developed by Syngenta on the basis of mesotrione. Because of its wide herbicidal spectrum, good safety and low price, it is one of the safest herbicides at present Often mixed with nicosulfuron and other herbicides, it can not only expand the scope of weed control, but also improve the safety of herbicides. It is one of the best herbicides at present. It can effectively control annual broad-leaved weeds and gramineous weeds in corn fields. Especially for weeds such as abutilon, amaranth, Chenopodium album, Polygonum hydropiper, barnyard grass and crabgrass.
4. Benzoxadiazine
Benzoxanone is the first post-emergence herbicide phenylmethyl pyrazolone developed by BASF company in corn field, which has outstanding advantages such as wide weeding spectrum, high activity, strong miscibility and safety to corn and subsequent crops. It has become the most widely used herbicide in special corn such as sweet corn, waxy corn and popcorn. It is widely used in almost all corn varieties, such as common corn, waxy corn, sweet corn, seed corn and popcorn. It can be used in the 3 ~ 9 leaf stage of corn. It is the most widely used and safest herbicide in production at present. Because benzoxazinone is still in the patent protection period, the price is relatively high. In order to reduce the cost and improve the weeding effect, oxadiazon is often mixed with herbicides such as atrazine and terbuthylazine.