What to pay attention to when using corn seedlings

The occurrence of weeds in corn fields is different according to the sowing date. There are obvious differences in the occurrence of weeds in corn fields. Now in the rainy season, this season's cornfield is overgrown with weeds, common weeds include alfalfa, foxtail, and fragrant aconite. Now the corn has grown to almost 4-6 leaves. During this period, we should pay attention to the application of herbicides . what?
The use of corn post-emergence herbicides should pay attention to what is the problem that most people will not pay attention to. China Pesticide Network reminds everyone that corn post-emergence herbicides

Be aware of the following issues when using:

The best time for spraying herbicides after corn seedlings is: 3 to 5 leaves of corn, the best season of weeds 2 to 4 leaves, choose the clear and windless weather application, also choose before 10 am, 3 pm Apply later.

Safe weeding advice:

Paraquat or gram-free directional spray is generally recommended for killing field weeds after higher corn plants, but when farmers use such herbicides, they often cause damage to corn leaves due to improper operation.
In order to avoid damage to the blade, the following suggestions are as follows: 1. Using a new type of sprayer to eliminate the backward worker-type 16 sprayer, the sprayer with the drip liquid can not be used, and the drop of the drug to the blade is avoided. 2. Add a spray hood to the nozzle. 3. Choose no wind or spray at a small time to avoid damage to the corn or other plants. 4. The sprayer that sprays the herbicide is as special as possible. If other pesticides need to be sprayed, the sprayer must be cleaned before use.

After application, the corn leaves have mild brownish green macula, but can quickly return to normal. Jade is below the 2 leaf stage, more sensitive than the 5th leaf stage, and is prone to disease. The sensitive varieties of this agent are sweet corn and popcorn. This drug is sensitive to corn leaves treated with organophosphate insecticides . When the temperature is applied at 20 °C, the relative humidity of the air is above 60%, and there is no rain within 12 hours after application, which is beneficial to the effect of the drug.

Application to prevent phytotoxicity:

Due to the high number of rains from June to July and the large amount of rainfall, the herbicidal effect of closed herbicides such as B-A mixture was not satisfactory, and some resistant weeds appeared in the field. Some farmers began to use corn field post-emergence herbicides instead. A closed herbicide before sowing. However, due to the irregular operation of the sub-field, many problems in production have gradually emerged. For example, the herbicidal effect is not ideal, and the field poisoning frequently occurs, which has brought many adverse effects to corn production. The specific practices should follow the following points: 1. Apply the drug in the 3 to 5 period after corn seedlings. 2. Strictly control the amount of medication. 3. Use safe mixed herbicides such as atrazine, sulfimsulfuron (before corn 4 leaf stage), and clopyralid. 4. Do not mix with organophosphorus pesticides, do not use organophosphorus pesticides within 7 days before and after application.

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