Several important considerations when using herbicides

Herbicides are one of the indispensable pesticide products in agricultural production. What are the precautions in the use of herbicides?
Today, China's pesticide network Xiaobian summed up " a few major considerations when using herbicides ."
First, the correct choice of herbicides herbicides mainly have the following types: 1 selective herbicides. These herbicides are used within a range of doses to selectively kill certain harmful plants, while being safe for crops and properly used in crop fields, can achieve the goal of killing only weeds without harming the crops. 2 killed herbicides. This type of herbicide has a killing effect on all plants and is limited to killing grass as a leisure field and an idle place. 3 contact herbicides. Such herbicides only damage the site where the plant is exposed to the drug and have no effect on the site where the drug is not exposed. 4 internal absorption type weeding type. The active ingredients of such herbicides can be absorbed by the roots, stems and leaves of plants and rapidly transmitted to the whole plant, thereby killing harmful plants.
Second, correctly master the period of use and dosage Some herbicides are mainly soil treatment, and some are sprayed stems, leaves and plants. Use the medicine at the most appropriate time depending on the weeds in the orchard. Most of the herbicide dose is calculated on the basis of the active ingredient, unlike other pesticides , which are clearly indicated how many times the application is applied.
Third, strict operating procedures
Read the instructions and precautions first. In addition to the purpose of mixing the two herbicides for synergy, do not mix them together. It is best to use special spray equipment when spraying to prevent spraying other herbicides after spraying the herbicide, causing phytotoxicity due to residual herbicides. Spray evenly and do not spray the medicine on the branches and leaves of the fruit. When using, choose a spray when there is no wind on sunny days. Some herbicides have corrosive effects on metal containers such as iron (such as glyphosate). Plastic or ceramic containers should be used.
Fourth, follow the principle of mixed herbicides
The herbicide should be used in strict accordance with the following principles: 1 the mixed herbicide must be different in killing grass; 2 the mixed herbicide should be used in the same period and method; 3 the herbicide can not be precipitated or stratified after mixing After the herbicide is mixed, the amount is 1/3 to 1/2 of a single amount. In addition, for herbicides that cannot be mixed with each other, the method of staging can also be used to kill weeds. The method of application is: alternately using herbicides on the same soil, such as killing grass weeds with trifluralin, killing broadleaf weeds with culling, and taking soil treatment and post-emergence stems. The method of leaf treatment is combined.
Fifth, pay attention to medication safety
Pay attention to labor protection, wear overalls, wear masks, gloves and glasses during handling, preparation and spraying. In case of contact with the skin, rinse immediately with water. If there are symptoms of pesticide poisoning during operation, stop working immediately and go to the hospital for treatment to prevent accidents.

The " Precautions for Using Herbicides " is a summary of the pesticide network .