The time of corn chemical control, what medicine should be used?

The time of corn chemical control: the time of using exuberant is the 8-10 leaf stage of corn, that is, the early jointing stage of corn. The kinds of chemical control agents commonly used in corn are corn fortifier, ethephon, metoprolol, trimethoprim, paclobutrazol, ammonia fat and so on. Generally, the mixture can achieve the combination of quick effect and long-term effect, and is less affected by the weather. it is prominent to control prosperity and increase production, and the time of chemical control can be advanced, and it is non-toxic and has no side effects.

First, the time of corn chemical control

The main results are as follows: 1. The time of using corn control agent is the 8-10 leaf stage of corn, that is, from "ruler height" to "knee height" of corn. This stage is the early jointing stage of corn. Spraying chemical control agent can thicken the stem, shorten the Internode and reduce the height of ear.

2. The increase of the number of layers and strips of "overlord root" can not only effectively prevent the lodging of corn, but also promote the transfer of nutrients to the ear and reduce the empty plant and bald tip.

2. Types of chemical control agents commonly used in corn

The main results are as follows: 1. The main regulators commonly used in corn chemical control are corn butyrate, ethephon, metoprolol, dwarf, paclobutrazol, ammonia fat and so on. Although there are many corn growth control products on the market, they are still inseparable from the above ingredients, or mixtures, or a single dose.

2. However, when spraying corn, try not to use a single agent, because the use of a single agent has certain side effects, so it is suitable to use a mixture. Generally, the mixture can achieve the effect of a combination of quick effect and long-term effect, and is less affected by the weather. It is more prominent to control prosperity and increase production, chemical control time can be advanced, and it is non-toxic and has no side effects.

Matters needing attention in chemical control of corn

1. The solution should be prepared in strict accordance with the instructions, and the concentration of the solution should not be increased at will.

2. It is necessary to strictly control the spraying period, not earlier or later, too early will inhibit the normal growth of the plant, but too late will not achieve the desired effect of chemical control.

3, during the period does not re-spray does not leak spray, the drought does not spray, may spray the corn upper leaf, cannot carry on the whole plant spray.

4. The liquid should not be stored for a long time, nor should it be mixed with pesticides and chemical fertilizers to avoid failure.

5. Within 4 hours after spraying, it is necessary to re-spray in case of rain. when re-spraying, the dosage should be halved.

6. Do not smoke, drink or eat when applying the medicine. wash the skin of your hands, face and contaminated clothes in time after applying the medicine.

7. The plots of high-yield fields with high water and fertilizer and tolerance to close planting are suitable for chemical control, while the low-and medium-yield fields, lack of seedlings and replanting plots, and the plots with obvious insufficient biomass due to special reasons can not be controlled.

Fourth, the harm of premature corn prosperity control.

If corn uses exuberant in less than 8-leaf stage, it will lead to low stalk and low stem because of premature control, so it is recommended to use exuberant after 8-leaf stage.

Fifth, the harm of corn growing too late.

If the corn control agent is used too late, when the number of leaves is more than 11, the corn has passed the jointing stage, and the following problems will occur.

The main results are as follows: 1. It is necessary to shorten the basal 1-3 internodes, but if used too late, the middle 4-5 internodes are shorter than the basal 1-3 internodes, which not only can not effectively avoid maize lodging, but also lead to poor growth and reduced yield.

2. Affect the male ear differentiation of maize: after jointing, the male ear of maize will begin to differentiate. If the growth of maize is controlled at this time, it will affect the male ear differentiation of maize, resulting in a small amount of corn tassel pollen, thus affecting corn pollination and reducing maize yield. therefore, it must not be too late to control the prosperity of corn.