How to control summer corn seedlings

Check seedlings

After planting summer corn, it is necessary to check the seedlings and make up the seedlings in time Replanted seeds should be first soaked and germinated to promote early emergence. If the replanted corn cannot catch up with the seedlings that were originally planted, the method of transplanting seedlings can be used. The transplanting time should be in the afternoon or cloudy days, it is best to transplant the soil with soil to facilitate the return of seedlings and improve the survival rate.

Miao Ding Miao

The seedling and seedling work are generally carried out in the 3~4 leaf stage. Because the corn is in the “weaning period” before and after the 3-leaf stage, there must be good light conditions. If the plants are overcrowded during the seedling stage, the roots of the plants will be staggered. The phenomenon of water competition. According to the relevant agricultural scientific research department, the summer maize is fixed in the 5~9 leaf stage than the 3~4 leaf stage, and the yield per acre is reduced by 14%~27%. Therefore, the work of seedlings and seedlings should be carried out as early as possible. The time between seedlings and seedlings should be in the sunny afternoon. The seedlings, insect bites and dysplastic seedlings are prone to wilting in the afternoon, which is easy to identify and eliminate. For those silky black-spotted seedlings with dense seedlings, thick, fine, curved, black-green leaves, they should be completely removed.

Seedlings

The seedlings should start from the seedling stage and before the jointing. The seedlings should master the principle of “black, not yellow, fat, not thin, dry and not wet”. Interplanting corn seeding growth conditions are poor, generally not suitable for seedlings. We should do a good job in water and fertilizer management, and promote weakening and strengthening.

Cultivating weeding

Corn seedling mid-cultivation can generally be carried out 2 to 3 times. Before the seedlings are young, the seedlings are short, and the first cultivating can be carried out. When the cultivating is carried out, the seedlings should be avoided. The depth of cultivating should be 3~5 cm, the side of the seedling should be shallow, and the row should be deep. Although the cultivator will cut off some fine roots, it can promote new roots and control the growth of the aboveground parts. The intercropped corn field is generally relatively knotted at the seedling stage, and should be cultivated in time after the wheat harvest, remove the wheat bran and break the knot.

top dressing

According to research, phosphate fertilizer has the best effect before 5 leaves. Therefore, phosphorus, potassium fertilizer and organic fertilizer should be applied as early as possible before and after seedling.

There are many types of pests in the control of pests, especially summer maize. At present, the main pests that harm corn in the seedling stage include earth tigers, aphids, thrips, cotton bollworms, lamp moths and wheat straw flies. It is necessary to do a good job in measuring and reporting the insects in time to find out timely control of pests.