How can corn herbicides be used without damaging seedlings? Attention to spraying!

Corn is one of the main food crops in China, but corn weeds have always been a trouble in corn planting. So, how to use corn herbicides without harming seedlings? What are the ways to use corn herbicides?

First, how to use corn herbicides without harming seedlings?

Summer corn should use herbicides reasonably, not too much or too little; too much use will have a negative impact on corn seedlings, too little use will not have the effect of weeding, and the dosage is incorrect, it will cause drug damage in dry and high-temperature and high-humidity areas, so it is necessary to strictly abide by the dose use instructions.

The dosage of soil treatment before seedling is 150-250g per mu of land, and that of weeding after corn seedling is 80-150g per mu of land; to avoid using the drug at noon or in high temperature and strong light, the chemical is highly volatile and wasteful at this time. The stomata of weeds are also closed, the absorption of chemicals is limited, drugs can not play a good control effect.

If it is spraying in a sunny day, it should be 8-10:00 in the morning or after 5 o'clock in the afternoon when there is no dew before sunset, and should stop spraying when the wind is strong, the wind will cause uneven spraying, and it is also easy to cause drug damage; in addition, do not increase the concentration of the drug casually, casually increase the amount of herbicide and reduce the dilution times of herbicide will cause damage to plant leaves.

The drug damage should be rescued in time, the method is to use water spray to remove the residual herbicides on corn leaves to reduce the concentration of herbicides in corn, reduce drug damage, when the drug damage is mild, some foliar fertilizer or regulators can be sprayed to alleviate drug damage, in the later stage to strengthen the management of corn fertilizer and water, timely supplement of water-saving fertilizer, so as not to cause large area losses.

Points for attention in spraying corn herbicides

1. Use medicine to avoid high temperature and bright light at noon.

The herbicide is sprayed around noon when the temperature is high and the light is strong. First, the herbicide is highly volatile and wasteful. Second, at this time, the stomata of weeds are closed, the absorption solution is limited, the spray is not easy to hit the target, and the control effect is not ideal.

2. Choose medication on cloudy days without rain.

If it is a sunny day, spray after 8 am to 10:00 after sunrise or after 5 pm without dew before sunset. When the wind is strong, you should stop spraying, otherwise it will cause uneven spraying and easy to cause drug damage.

3. Pay attention to physical protection

The medicine liquid in the taboo bucket is too full, and some farmers like to fill the spray bucket very full when spraying medicine. This is not only disadvantageous to spraying, but more importantly, if the cover of the sprayer is not tightly closed, the liquid will spill and touch the body when the sprayer is walking in the field, which can easily cause poisoning in the hot season. The correct way is that when dispensing, the upper surface of the liquid in the bucket should be below the scale line, and the sealing ring of the lid must be intact to ensure that the lid is closed tightly.

4. Taboo to increase the concentration of medicine solution at will

In order to improve the work efficiency or to enhance the control effect, some farmers often increase the amount of herbicides, reduce the dilution times of herbicides, and increase the concentration of herbicides at will, even in the high temperature season in midsummer. Due to the rapid volatilization of water in the hot sun, if the concentration of pesticide sprayed is too high, it is easy to cause chemical damage to plant leaves.

5. Mixed use of taboos and organophosphorus pesticides

Such as dichlorvos, omethoate, chlorpyrifos, phoxim, malathion and so on. It is easy to cause drug damage when mixed with herbicides in high temperature weather.