6 strokes to improve weeding in the corn field

1. Choose qualified herbicide products. This kind of product has many manufacturers, different technical strengths, and a variety of product types, and the quality of products has certain differences from each other. The selection of qualified products is the primary condition for ensuring weed control. From the aspect of appearance, the production date of the product is within two years, preferably the product in 2007; the product labeling project is complete and clear; the chemicals shake up and down, the stratification disappears, no caking, and may be qualified products.
2, use time as early as possible. The soil treatment agent is sprayed 2-3 days after the corn is sown and poured over the headwaters, so that the weeds can be exposed when the weed seedlings germinate to kill the weeds and eliminate the unearthed grass. After the corn has been sowed, the weeds have been excavated quickly. If the herbicide cannot be sprayed in time, the best prevention and treatment time will be delayed and the control effect will be reduced. The earlier the use, the better the control effect.
3, appropriate removal of wheat straw. To achieve the desired control effect, the herbicide used must form a film on the soil surface. The vast majority of wheat fields are returned to the straw and no-till corn is sown. Therefore, there are a large number of wheat straw in the field. Some of the sprayed pesticides are intercepted by the straw and cannot reach the soil surface, affecting the effect of the soil treatment agent, and properly removing part of the wheat straw. , can improve the effect of medication.
4, increase water consumption. Applying the herbicide evenly to the surface of the soil requires water as the medium. The application effect of herbicides is positively related to the humidity of the soil surface. Under normal circumstances, the greater the humidity of the soil surface, the even distribution of the herbicide on the surface, the better the weeding effect. In the large amount of land where straw is returned to the soil, the amount of water used when herbicides are sprayed should be appropriately increased in the dry soil. Generally, the water consumption per mu is 30-45 kg.
5, avoid bad weather conditions application. (1) Avoid spraying on rainy days. If there is rain within 24 hours after application, the medication should be stopped. Rainwater can destroy the film formed just after the spraying of herbicides. Infiltration of herbicides not only does not act as a seal to the soil, but may also affect corn emergence or soil contamination due to infiltration. (2) Avoid windy days and high temperature weather application. The application of herbicides on windy days and in hot weather has a strong drift, which reduces the amount of pesticides reaching the soil surface and reduces weeding effects. Drifting herbicides are likely to cause harm to the environment and surrounding crops, so it is advisable to use herbicides. In the absence of wind before 11 am or after 4 pm.
6, according to the appropriate adjustment of soil texture. The clay soil has a high content of organic matter and small soil particles. It has a strong adsorption effect on herbicides and can make some herbicides inactive. Therefore, the upper limit of the recommended use amount must be used; sandy soil has a weak adsorption effect on herbicides. Post-infiltration is likely to cause phytotoxicity on the germinating seeds or the roots of the plants, so use the lower limit of the recommended amount.
In addition, it is necessary to fully dilute the liquid and evenly spray in the field, and do not increase the dosage arbitrarily.

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