There are many types of pesticide herbicides, and each herbicide has a certain herbicidal spectrum. Some herbicides have a very narrow spectrum of herbicides, such as oatmeal, which can only control wild oats; the effect of dimethyltetrachloride on the control of sage, horseshoe, and wild oatmeal is very good, and the effect of controlling pig mites is very poor; 24-D is effective for controlling dicotyledonous weeds such as amaranth, but not for grass weeds. Farmers should choose the herbicide for the road according to the most weed species in the wheat field in order to receive the desired effect. For the control of broad-leaved weeds, weeding nets, earth grass nets, bensulfuron-methyl, baijia mixture and other varieties have good herbicidal effects; while metsulfuron-methyl, chlorsulfuron-methyl, wheatgrass, etc. can only be used in rice-wheat rotation. Early use in wheat fields, if rice cultivars plant cotton, corn, peanuts, beans and other crops, serious phytotoxicity will occur, resulting in almost unacceptable accidents. The following is a brief introduction to the application of herbicides in vegetable fields:
1. The effect of herbicides on controlling weeds in vegetable fields and the safety of vegetables is closely related to the climate, soil quality, vegetable varieties and cultivation methods. Therefore, the use of each herbicide should follow the test. The principle of “demonstration and promotion†is to achieve the effect of labor saving, safety, high efficiency and high output value.
2. Cucumber, lettuce, and Artemisia selengensis are sensitive to trifluralin and chlorpyrifos herbicides. Celery and carrot are sensitive to dichlorpyrifos. Liliaceae vegetables such as leeks and green onions are sensitive to herbicide ether, and they have been used in the past. Fields of herbicides are also very sensitive, and care should be taken to avoid application and contact.
3. Master the time of medication. Trifluralin, dichlorfen, herbicide ether, chlorpyrifos and shitianbu are all soil treatment agents, which are mainly absorbed by the roots and shoots of weeds to inhibit the growth of weeds.
4. Master the amount of water used in medicine. Each acre of 25-30 kg of water must be evenly sprayed, and the sprayer used does not run, run, drip or leak.
5. The soil treatment agent must be sprayed after the rain or after watering, that is, when the soil moisture content is between 20% and 30%, the soil should be mixed 2-3 cm deep in addition to the Fluorine spray to prevent photolysis.
6. When using herbicides in greenhouses and greenhouses, high temperature should be ventilated and ventilated to avoid phytotoxicity.
China Pesticide Network , providing the most comprehensive pesticide information!
SPOT 1050/1080/1075
Width : 1050/1080/2270mm
Efficient width : 960/940/2200mm
Thickness : 2.0mm, 2.3mm, 2.5mm, 2.8mm, 3.0mm
Length : customized
Aplication : villa, residential roof, etc.Spot Roof SheetCorrugated Roof Panels,Corrugated Plastic Panels,Corrugated Plastic Roofing
FOSHAN CHANCHENG XINGFA TILE INDUSTRY CO., LTD. , https://www.upvcsheetsupplier.com