Key points of chemical weeding technology for summer corn

Summer maize (2363, -1.00, -0.04%) growth period from June to September, coincides with high temperature and rainy season, which is beneficial to the occurrence of weeds in the field. Once the control period is missed, it is easy to form a grassland and seriously affect the growth of corn. Chemical weed control is an important measure to control the damage of weeds in corn fields and increase corn yield. In order to ensure the high yield of summer corn in our county, it is required that the summer corn planting area should effectively perform the chemical weeding work for summer corn.

First, the object of prevention

According to the county plant protection station survey, weeds in summer corn fields in our county mainly include: Tian Xuanhua, Nongxugao, Xiangfuzi, Macdonium, Purslane, Setaria viridis, Poria oleifera, Maiqing.

Second, prevention and control technology program

1. Post-emergence

In the 2-5 leaf stage of maize, before the weeds were released to the 5th leaf stage, 100 ml of nicotine-thiophene was used to water more than 30 kg per mu, and uniform field spray control was applied.

2. Directional spray killing herbicides

In order to prevent phytotoxicity, we must stop using corn seedling post-emergence herbicides. We should use selective killing herbicides for inter-row direct spraying and weed control. Can be used 20% paraquat 200ml/mu or 20% grams without trace 100-120ml/mu spray control.

Third, pay attention to matters

1. Use safe and effective herbicides and strictly follow dosage instructions. 2, when spraying to avoid the hot weather, when the temperature exceeds 30 degrees to stop spraying, to prevent the occurrence of phytotoxicity, try to choose a sunny windless weather, before 9 am or after 4 pm spray.

3, spraying a sufficient amount of water, water per mu of not less than 30 kilograms, try to use manual sprayer, the liquid evenly sprayed on the weed leaf surface, pay attention to avoid corn leaves.

4. It is required that the cornfield be well-behaved when spraying, and the soil must be artificially irrigated (irrigated) before the soil becomes dry, and then the herbicide is sprayed to prevent the spraying of the pesticide when the soil is dry.

5. The sprayer should be thoroughly cleaned after spraying the herbicide so as not to cause phytotoxicity on other crops.

Recommended reading: Herbicides: http://

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