Cyclothione
Development: Sulfone is a new type of triketone herbicide developed by Bayer Company. First registered in Austria in 2007, it has been registered in dozens of countries such as Belgium, France, Germany, the Netherlands, Brazil, the United States, Mexico and Serbia.
Mechanism of action: Cyclosulfone ketone is an inhibitor of p-hydroxyphenylpyruvate dioxygenase, that is, HppD inhibitor. By inhibiting the synthesis of p-hydroxyphenylpyruvate dioxygenase, tyrosine accumulates, which hinders the biosynthesis of plastoquinone and tocopherol, thus affecting the biosynthesis of carotenoids. Weeds turn green and yellow and die within 2 weeks.
Action spectrum: It can be used to control gramineous weeds and broad-leaved weeds in corn fields. Such as Arnebia euchroma, amaranth, wild licorice, buckwheat, alfalfa, millet grass, chamomile, chickweed, clover, cocklebur, cornflower, erigeron, Chenopodium, sunflower, morning glory, ragweed, Euphorbia, barnyard grass, crabgrass, false sorghum, millet, green bristlegrass, burdock, etc. It has a good effect on malignant weeds and resistant weeds in corn fields.
Typical characteristics: Thiopenyl has higher activity than mesotrione, which can protect corn from ultraviolet rays, has the characteristics of broad spectrum and quick effect, and is highly compatible with the environment. It can be used to control annual gramineous weeds and broad-leaved weeds in corn fields, and to control cross-spectrum weeds, mainly annual weeds of Setaria and Chenopodium. At the same time, sulfolane also has a strong killing effect on many weeds such as Cirsium japonicum, convolvulus, Veronica, Capsicum, Zunma, Chrysanthemum morifolium, Grifola frondosa, etc., and can also play a role in weeds resistant to herbicides such as glyphosate, dicamba and ALS inhibitors. The herbicide has long weeding cycle, good weeding activity in the whole growth period of crops, strong rain erosion resistance and safety to crops (including subsequent crops).
Development prospect: in 2009, the global sales of sulfolane was USD 300 million, USD 95 million in 20 10, USD 654.38+200 million in 20 12 and USD1850,000 in 2012. In 20 14, the global sales of sulfolane increased to 240 million USD again, up by 14.3% year-on-year, and the compound annual growth rate from 2009 to 20 14 reached 510.6%. 20 15 annual sales of 230 million us dollars. 20 15 cyclosulfuron-methyl ranked seventh among herbicides in corn field and second among HppD inhibitors. With the further expansion of the registered scope of related companies and the expiration of the patents of this product in more countries, the market prospect of this product is very broad.
The main advantages of the preparation product are: 5% mesotrione dispersible oil suspension; 30% mesotrione terbutzin dispersible oil suspension; 34.5% mesotrione suspension concentrate; 33.9% mesotrione thiuron EC, etc.
Oxazolidinone
Development: Yicaolong is a triazolinone herbicide discovered by Bayer Company in 1988 and introduced at the World Plant Protection Conference held in Brighton, England in 1999. In 2004, Alistar Biochemical North America Co., Ltd. transferred Bayer's technology.
Mechanism of action: Azinphos-methyl is a photosynthetic inhibitor. The typical symptoms of sensitive plants are yellowing, stopping growth, yellowing of tissues and eventually death, and it is cross-resistant with other photosynthetic inhibitors (such as triazine herbicides).
Action spectrum: Azimuth is a selective exposure herbicide treated before seedling and after seedling, which is mainly absorbed by roots, and germinated seed seedlings can also be absorbed by leaves. It is suitable for pre-seedling treatment to control annual dicotyledonous weeds, broadleaf weeds, gramineous weeds, sedges and perennial weeds in corn fields, sugarcane fields and lawns, such as abutilon, Chenopodium album, amaranth, Xanthium sibiricum, sweet potato, centipede intestine, Miscanthus bungeana, Echinochloa crusgalli, poinsettia and Tribulus terrestris.
Typical characteristics: the biggest advantage of herbicide Zypyr is its long weeding time, stable efficacy, safety to groundwater and subsequent crops, and its dosage is only 1/2 ~ 1/3 of atrazine, and it also has the functions of stem and leaf treatment and sealing.
Development prospect: the sales in 2007 are less than 30 million dollars, and the sales in 20 14 are 90 million dollars. The compound annual growth rate in 2007-20 12 was 2 1. 1%, and it was 20.8 in 2009-20 14. Many enterprises have realized the advantages and development potential of imazethapyr, especially when there are many uncertainties in the re-evaluation conclusion of atrazine, this product has a good development space.
The main advantage preparation products: 70% imazethapyr water dispersible granules; 26% nicosulfuron imidazolone dispersible oil suspension; 36% mesotrione, oxazolidinone, ametryn wettable powder, etc.
terbuthylazine
Development: terbuthylazine is a corn field weeding product promoted by Syngenta, Andaomai, Oxon, Dow Agron, Herbos and other companies all over the world. This product has a great market in weeding corn fields in Europe, and is developing in countries and regions such as America and Asia.
Action mechanism: The action mechanism of terbuthylazine is to inhibit the electron transfer in photosynthesis. After plants absorb terbutazone, it is conducted in the extracellular system, enters the thylakoid membrane of chloroplasts through xylem, and combines with QB protein in the electron transfer chain of photosynthesis, so that the function of QB protein is destroyed, and electrons cannot be continuously transferred, which finally hinders photosynthesis.
Action spectrum: selective systemic conduction, drugs can be absorbed from roots, or infiltrated into plants from stems and leaves and transported to green leaves to inhibit photosynthesis. Generally, it has a better effect on newly grown weeds. It can control annual broadleaf weeds and gramineous weeds.
Typical characteristics: terbuthylazine has the characteristics of low cost, strong compound and low toxicity, and has obvious advantages compared with atrazine, and will soon become a new generation of "companion" products for weeding in corn fields.
Development prospect: terbuthylazine, as a triazine herbicide, is similar to atrazine in principle of action and application technology, but it has its own unique features, such as short residue period, wider weed control spectrum, good crop safety, no drug resistance after continuous use, and can be used to control most weeds. Terbuthylazine has strong compatibility, and can be compounded with mesotrione, mesotrione, nicosulfuron, sulfuron-methyl, alachlor, bentazone, diuron, formyl-amino-sulfuron, glyphosate, methyl iodosulfuron sodium salt, metolachlor, etc.
Main advantage preparation products: 30% terbuthylazine suspension concentrate; 30% mesotrione terbutzin dispersible oil suspension; 49% terbutzinyl mesotrione metolachlor suspension emulsion, etc.
Benzoxadiazine
Development: benzoxazone is the first phenylmethyl pyrazolone herbicide developed by BASF.
Mechanism of action: The post-emergence herbicide P-hydroxyphenylpyruvate dioxygenase inhibitor has a good control effect against weeds such as glyphosate, triazines, acetolactate synthase inhibitor and acetocoenzyme A inhibitor, and can effectively control the main gramineous weeds and broad-leaved weeds in corn crops around the world.
Function spectrum: It is used to control gramineous weeds and broad-leaved weeds in warm season after seedling in corn field, such as crabgrass, barnyard grass, cattail, green bristlegrass, wild millet, Chenopodium album, Polygonum hydropiper, Amaranthus retroflexus, ragweed, Datura stramonium, Achyranthes bidentata, purslane, Xanthium sibiricum, Solanum nigrum, Emilia sonchifolia and so on.
Typical characteristics: the safety of corn and its subsequent crops is the core factor for this product to become the leading product of weed control in corn field. Benzoxanone has high activity, extremely low dosage, wide application period after seedling, flexible use and wide weed control spectrum, and can control gramineous weeds and broad-leaved weeds in warm season, especially effective control of resistant weeds such as Setaria viridis, Sargassum and Ajuga.
Development prospect: 20 1 1, oxadiazon is registered and listed in China with the trade name "Wei Bao". In 20 12, BASF launched its product Armezon in the United States, which was used in corn, residential areas and lawns. The sales of oxadiazon continued to grow strongly, with a compound annual growth rate of 33.6% in 2009-20 14. In 20 19, oxadiazon became more and more popular in the field of corn field weeding in China, and the contradiction between supply (small) and demand (large) was prominent, and the price remained high. The core reason for this situation is that the supply of APIs is very small. The patent of oxadiazon in China has expired, and it is in the initial stage of rapid development in China and the world. The synthesis technology of oxadiazon has been gradually conquered by domestic enterprises. After mass production, this product will become one of the core varieties of weeding in corn field, with great development potential and broad market prospects.
Main advantage preparation products: 30% oxadiazon suspension concentrate; 30% oxadiazon dispersible oil suspending agent; 30% oxadiazon terbutzin dispersible oil suspension, etc.
There are many kinds of weeds in corn field, which have great influence on corn yield. Chemical weeding is still the core means of weeding in corn field. Therefore, corn field is a crop with a large amount of herbicides. All the above weeding products in corn field have good development prospects. We suggest that enterprises committed to developing weeding products in corn fields should pay attention to it and develop supporting products as soon as possible to avoid being at a disadvantage in the future weeding market competition in corn fields.