How many leaves of corn should I use to apply growth control medicine (can I use growth control medicine on corn with 6 or 12 leaves)

1. Corn should also be prevented from lodging, as lodging and root cutting are difficult to recover

Once a corn plant falls over, it will pull off the root system on one side of the plant, which will have a serious impact on the yield and quality of the corn. Therefore, we must pay attention to preventing corn from falling over.

Prevent corn from lodging:

First, you should choose short-stemmed varieties that are resistant to lodging. A low chassis will definitely make it more stable.

The second is to deepen the tillage layer. If the land is deeply plowed and the ground is soft, the root system of corn will definitely be well developed, the number of roots and the depth of the soil will increase, the grip will be strong, and the corn will resist lodging.

For example, deepening the tillage layer of the ploughed land is possible for spring corn, but it may not be possible for summer corn, because summer corn here is sown next to the stubble, without ploughing the land.

Third, pay attention to the stunting of seedlings. As the saying goes, money can’t buy drought in May. The fifth month of the lunar calendar is the seedling stage of corn. It doesn’t matter if there is some drought at this time. Corn is very drought-resistant. A slightly dry condition can help the seedlings stunt, promote deep root growth, and play a role in resisting lodging.

Fourth, pay attention to reasonable planting density and control the amount of nitrogen fertilizer when applying fertilizer.

The fifth is to carry out chemical regulation, such as spraying growth control agents to inhibit the length of the base internodes and shorten the plant height. At the same time, it can also promote the development of the root system and improve the ability to resist lodging.

Spraying growth-regulating agents on corn has been a practice in recent years. The growth-regulating agents used are special for corn, such as Corn Mate, Little Fatty, etc. Their main ingredients are foliar fertilizers containing iron, and there are also other ingredients.

Second, there are a few points to note when using corn growth control agents:

1. For plots with high fertilizer and water content, high density, excessive growth, heavy rainfall, and high risk of lodging , especially high-yield plots, spray chemical control agents during the period when 7-11 leaves of corn are unfolded to prevent lodging.

2. Spraying corn growth control agents can moderately control plant height , promote the thickness of stems and the photosynthetic capacity of leaves, enhance stress resistance and lodging resistance, and help improve population structure.

Therefore, when using chemical control agents, you must pay attention to the reasonable concentration ratio to prevent the plants from being too short due to excessive dosage, unable to produce sufficient photosynthetic products, and affecting yield.

3. It is not suitable to spray growth control agents on fields with reasonable density and normal growth, low-fertility fields with low fertility, and plots for replanting of missing seedlings. It should be used according to the growth potential of corn, spraying for growth rather than for weakening.

4. The spraying period should not be too early or too late. Spraying before the 5-leaf stage will suppress the plant too much and lead to reduced yield. Spraying too late, after 12-13 leaves, will not reduce plant height and prevent lodging .

5. Corn growth regulators can be mixed with insecticides and fungicides, but it must be ensured that the insecticides and fungicides used are non-alkaline.

6. When spraying corn growth control agent, it needs to be prepared and used immediately, and it should not be stored for a long time. If it rains 6 hours after spraying, the amount needs to be half as much and then spray again.