The end of July to the end of August is the high temperature season. What should we pay attention to when planting corn?

From the end of July to the end of August every year, more than one month is the best time for corn growth. Therefore, this is also the most serious period of corn pests and diseases. I also planted corn in my hometown in the countryside for many years. Here I would like to share my management of corn for more than a month and my farming experience for the older generation.

Corn seedlings can be sprayed with tremella rooting agent and high chlorofluorocarbon polyester potassium dihydrogen phosphate once. Because moth larvae are particularly easy to be born in the corn field at seedling stage, the heart that eats corn specializes in the tender leaves of corn, so it is best to sprinkle pesticides once and wheat, wheat stubble, wheat straw and chaff once. Demonstration moth larvae have the habit of eating corn seedlings in the field during the day. If the illness is not serious, we ordinary people can get up early, turn on the headlights and catch pests manually.

When the corn grows to about 70 cm, it can be sprayed with strong chemicals and mixed with pesticides and trace elements. Especially zinc fertilizer has a great influence on the growth and development of maize. During this period, the corn borer began to break out, and a compound insecticide can be sprayed in advance. General agricultural stores suggest that you can choose a prevention time of about 30 days.

If there are still heartworms or snails after corn heading, the old people here will bury diluted pesticides one by one in the corn beard in the morning, just in case. Because corn plants grow too high, the protection of drones in our land has not been popularized, so we can only prevent insects like this. Generally, a person can wipe 0.5 mu of land at one o'clock in the morning. Snails also existed a few years ago, and they can only be prevented by spraying paraformaldehyde on bibimbap soil.

The infection time of brown spot disease and normal bacterial rot disease is the same, and it is easy to get sick in the middle and late July, with rainy weather and hot and humid weather. Some varieties are prone to brown spot disease, such as Zhundian 20, and triadimefon should be sprayed in time after rain. If you want to plant varieties related to Changchang 733542, such as Single Crystal 958, you should spray jingkangmycin (or agricultural streptomycin) in time to prevent bacterial stomach diseases.

The main pests in this period are corn borer, cotton bollworm, brown toenail, armyworm, beet armyworm, aphid, horse, gray mite and other visual pests. The coping method is to inject the medicine once before and after mid-July and once during honking. Small reagents are best injected into the heart with particles. This is not only to prevent corn from eating leaves, but also to prevent corn insects from eating ears after the ear of corn is born, and aphids multiply in large numbers before pollination. It has an effect on moisture. Spraying scheme: S- 1 Xi' an polyurethane emulsifiable concentrate does not contain1~1.75g. acephate oil radish can be regarded as 36 ~ 72G. It can also be used as wet powder of monosultap. Radish can reach 48 ~ 64g, mixed with fine sand core leaves. Snails are easy to be injured in rainy season, which can be prevented by 4- polyacetal spray or cold bait.