1. Amide herbicides : It is the most important herbicide in corn field. It can be absorbed by weed buds. The soil is sealed before weeds to effectively control annual grass weeds and some annual broadleaf weeds. There are many varieties of such herbicides, such as acetochlor, alachlor, butachlor, metolachlor, and propisochlor. The test proved that the herbicidal activity comparison results were acetochlor > metolachlor > propisochloramine > butachlor > alachlor at the same effective dose; according to its effective amount, the quantitative comparison result of herbicidal activity was B. Oxalamide: Metolachlor: Butachlor: Isoprost is 1:0.9:0.8:0.7; this type of herbicide is greatly affected by moisture and the herbicidal effect is significantly reduced when the moisture is poor.
2. Triazine herbicides: It can effectively control annual broadleaf weeds and annual grass weeds, mainly based on weed roots, and can also be absorbed by weed stems and leaves. Representative varieties are atrazine, cyanazine, simazine, chlorfenapyr, etc., which are used more in atrazine, which is safer and more active for corn; but it is mixed with acetochlor to reduce the dosage. Improve herbicidal effects and safety for crops.
3. Phenoxycarboxylic acid herbicides: mainly to control 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, and 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.
More pesticide knowledge , please pay attention to China Pesticide Network
Drum brush is divided into long hair, medium hair, short hair three kinds, its performance is the length of the drum brush hair, rather than the thickness and length of the drum itself, brush hair is usually divided into wool and chemical fiber two kinds.
Different rollers will brush different effects, long hair rollers will brush out some fine texture, concave and convex feeling, similar to the texture effect. The paint surface after short wool roller besmear is more uniform, smooth, without concave and convex feeling, in the wool is between the two.
Roller brush is mostly made of wool and foam plastic, which can be divided into paint drum brush, hair drawing drum brush, floor paint drum brush, flat coating drum brush, etc., mainly used for large-area paint rolling in architectural decoration engineering. And can be used for coating and rolling all kinds of paint, such as: latex paint, anti-rust paint, internal and external wall paint, wallpaper glue, etc.
Note:
The use of drum brush as long as the straight brush can be wiped, if you want to daub evenly, the drum is best in the paint bucket to be fully absorbed, and then take out a few rolling on the inclined plane, press out the excess paint and then begin to brush the wall.
Low price, good quality products, to create a perfect house decoration
Paint Roller,Foam Paint Roller,Paint Roller Brush,Roller Brush,dry paint roller quickly
Behappy Crafts (suzhou)Co.,Ltd , https://www.craftsbehappy.com