Type of corn herbicide 1. Amide herbicides: These products are the most important herbicides in corn fields. They can be absorbed by weed buds and soil-sealed before weeds can effectively control annual grass weeds and some annuals. Broadleaf weeds. There are many varieties of such herbicides, such as acetochlor, alachlor, butachlor, metolachlor, and propisochlor. 2. Trinitrobenzene herbicides: It can effectively control annual broadleaf weeds and annual grass weeds, which are mainly absorbed by weed roots, and can also be absorbed by weed stems and leaves. Representative varieties are atrazine, cyanazine, simazine, chlorpyrifos, etc., of which atrazine is used more, it is safer and more active for corn, and mixed with acetochlor can reduce the amount of herbicide and improve the herbicidal effect. The safety of the crop. 3. Phenoxycarboxylic acid herbicides: mainly used for controlling broadleaf weeds and fragrant aconite after corn seedlings. Representative varieties are 2 methyl 4-chloro sodium salt, 2,4-D butyl ester. Among them, 2 methyl 4-chloro sodium salt is widely used in the corn field to control the fragrant aconite, but the use period is not easy to produce phytotoxicity. 4. Sulfonylurea herbicides: Nicosulfuron-methyl and sulfamesulfuron can be used in corn field to control grass weeds, sedge weeds and some broad-leaved weeds; timolone can be used for corn field control Annual broadleaf weeds. 5. Other herbicides: Paraquat and glyphosate are herbicides that can be sprayed at a height of 40 cm in corn to effectively control a variety of weeds. They can also be used to make it, chlorpyrifos, bromoxynil, Bentazon and other varieties control broad-leaved weeds in corn fields. Reasons for affecting the efficacy of corn herbicides One is to use herbicide time. The herbicide used is generally applied before the weeds 2-3 leaf stage, and if the time of administration is too late, the efficacy is seriously affected; The second is because of the method of application. If the forward type is used like a spray of other pesticides when spraying the corn herbicide, the footprint will destroy the film that has not yet formed on the surface of the liquid, resulting in a serious decrease in the efficacy of the herbicide. The third is due to the drought. When the herbicide is sprayed on the corn, the weather is dry, and the moisture in the liquid contact with the surface immediately evaporates, so that the liquid cannot form a film on the surface, which causes the drug to fail to function properly and has a poor effect. More pesticide knowledge, please pay attention to China Pesticide Network
High speed shutter door is a rapid operating, anti-crash shutter door for indoor application . The most advantage of this door is that the opening/closing speed can reach to 0.6-1.8m/s, really fast action a lot than tranditional rollling shutter door. short opening and closing times reduce cooling loss, avoid airflow and enable a smooth operating procedure. They can also be designed in larger dimensions for the mining and aircraft industries.
High speed door can be easily installed, economical,quiet and efficient with electromechanical drive.
This door quickly though in/out open gate, ideal for warehouses,factories, hangars use, widths can be from 2m to 20 meters.
The material of this door are variety: PVC curtain to keep the insdie clean, heavy duty aluminum door with wind-resisitant function can wrok in heavy windy weather, and also the freezer door can be used in cold warehouse or somewhere like that.
Including models are:PVC High Speed Door, Aluminum Spiral High Speed Door, Self-Recovery repair door, Cold Storage Room Fast Door.
High Speed Door,PVC High Speed Door,Aluminum High Speed Door,Spiral High Speed Door Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hffastdoor.com.jpg)
