Cornfield weeding safeners, after decades of scouring by large multinational companies, domestic pesticide manufacturers , distributors and farmers gradually realize their seriousness. Now almost all of the nicosulfuron preparations have added safeners. . Especially in the endless generation of resistant weeds, stubborn resistant weeds can be perfectly solved by increasing the amount of active ingredients and supplementing the necessary safeners. The use of pesticide safeners has also become increasingly mature. Even so, the choice of safeners is still a problem that plagues pesticide manufacturers. At the beginning of the safety agent, many manufacturers used dibenzoxazole acid. However, in less than three years, nearly one-third of the manufacturers switched to propyl sulfonamide. Over time, manufacturers switching to ciprofloxacin picked up the dibenzoxazole acid again. So far, with benzoxazole acid or cyclopropane sulfonamide, everyone has their own opinions, and the market is in chaos. Today, the author has taken the time to sort out the use of safeners around the world, and give the list a reference.
1 Use of dibenzoxazole acid
From a global perspective, dibenzoxazole acid is mainly used by DuPont and Bayer. The active ingredients of the compatibility are mainly nicosulfuron, sulfimsulfuron, oxazolazine, formylsulfuron and sulfonone; and a small amount of binary compound products such as formylaminosulfuron + Cyclohexanone, the popular crops are corn and rice.
Serial number | development company | product name | Active ingredients | Applicable crop |
1 | DuPont | RealmTM Q | Sulfensulfuron 7.5% | corn |
2 | DuPont | Accent ® Q | Nicosulfuron 54.5% | corn |
3 | DuPont | SortanTM IS | Sulfensulfuron 20% | corn |
4 | Bayer | CAPRENOTM | Cyclohexanone 28.30% | corn |
5 | DuPont | ResolveQ(mp) | Sulfensulfuron 18.4% | corn |
6 | Bayer | EQUIP OD45 | Formylaminosulfuron-methyl 2.34% | corn |
7 | DuPont | REVULINTM Q | Mesotrione 36.8% | corn |
8 | DuPont | Steadfast ® Q | Nicosulfuron 25.2% | corn |
9 | Bayer | LAUDIATM | Cyclohexanone 34.50% | corn |
10 | Bayer | TBT+IDF SC | Cyclohexanone 34.4% | corn |
11 | Bayer | MAISTER WG | Formylaminosulfuron 30% | corn |
12 | Bayer | OPTION ® | Formylaminosulfuron 35% | corn |
13 | Bayer | RICESTAR ® HT | Cholesterol and grass extract 6.7% | Rice |
14 | Bayer | FPP+IDFEC | Cholesterol and grass extract 6.70% | Rice |
Table 1 Herbicide varieties with dibenzoxazole acid as safener
In the use ratio, dibenzoxazole acid and nicosulfuron were 1:4, with sulfimsulfuron 1:2, formamide sulfasulfuron 1:1, and cyclosulfone 1:2.
2 Herbicides with cyclopropane sulfonamide as safener
Serial number | development company | product name | Active ingredients | Applicable crop |
1 | Bayer | MENRLIN FLEXX | Isoxaflutole 20.3% 240 g/L | sugar cane |
2 | Bayer | MENRLIN FLEXX L 88SC | Isoxaflutole 4.2% 44 g/L | corn |
3 | Bayer | CORVUSTM | Thiazulsulfonate 7.60% | Fallow land |
4 | Bayer | BALANCE ® FLEXX | Isoxaflutole 20% | corn |
5 | Bayer | CONVERGE ® FLEXX | Isoxaflutole 20% | corn |
6 | Bayer | AGENGO ® 465SC | Isoxaflutole 19% 225 g/L | corn |
7 | Bayer | AGENGO® | Isoxaflutole 3.97% 50 g/L | corn |
8 | Bayer | ADENGO TCMax | Isooxazolone 19% | corn |
9 | Bayer | KOLOSS TCMax | Isooxazolone 19% | corn |
10 | Bayer | IFT+CSASC | Isoxaflutole 20% | corn |
Table 2 Herbicide varieties with cyclopropane sulfonamide as safener
The main active ingredients with cyclopropane sulfonamide as a safener are isoxaflutole and thioxanthone, and a binary combination of the two. In the application of crops, corn fields are dominant. As can be seen from the above table, the use range of cyclopropanesulfonamide is much narrower than that of bisoxazolyl.
3 Comparison of two safeners
In addition to significant differences in the active ingredients, there are significant differences in the physiological activities of the plants. Related studies have shown that under the same ratio of conditions, bisoxazolyl can significantly reduce the inhibition rate of nicosulfuron on corn plant height and fresh weight, while cyclopropane sulfonamide has no such physiological effect. At the same time, studies have shown that cyclopropanesulfonamide has obvious detoxification effect on the herbicidal effect of nicosulfuron on horsegrass. The dibenzoxazole acid enhances the contact effect of nicosulfuron on the crabgrass. This practice is also confirmed by the practical application of many manufacturers.
It is foreseeable that in the next two or three years, bisoxazolidine will return to the dominance of safeners due to its excellent field effect. Any misunderstanding and abuse of safeners will disappear over time.
More pesticide knowledge , please pay attention to China Pesticide Network
(Source: Frontier herbicide application and resistant weed control)
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