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Corn sowing should pay attention to four issues
After the solar energy of Mang, our province has entered the critical harvest season. With the planting of corn stubble and the expansion of fertilizer application areas, some production challenges are gradually emerging, which all farmers should pay close attention to.
1. The type and amount of fertilizer used must be strictly controlled. Currently, most corn planters apply fertilizers only about 5 cm away from the seeds. It's recommended to use high-quality compound fertilizers or diammonium phosphate combined with potash. Urea should be avoided as much as possible. The total fertilizer application should not exceed 20-25 kg per mu to prevent seed burn caused by irrigation or heavy rain. In recent years, there have been cases where improper fertilizer placement led to seed damage, so farmers must be cautious.
2. Watering timing should be strictly managed. As the saying goes, "The spring battle is for the day, the summer battle is for the time." Early watering after wheat harvest is beneficial for maize growth and yield. However, if no water is provided within 3–4 days after sowing, seeds may suffer from "budding" issues. Even in less-than-ideal conditions, seeds might germinate but fail to establish properly. Every year, reseeding due to poor germination is a common problem. Therefore, farmers should sow as early as possible, depending on their field conditions and local water availability.
3. Chemical seed treatment is essential. In recent years, the occurrence of pests and diseases in corn seedlings has increased. Some seeds from seed companies are not coated, and farmers sometimes purchase unprocessed seeds that haven’t been sun-dried or treated. This can lead to damage from underground pests and result in thin or broken rows. Due to the large amount of wheat straw left in fields after harvesting, the soil becomes compacted, making it harder for seedlings to emerge. Farmers should buy coated seeds from reputable suppliers. Quality seed coatings include both pesticides and fungicides, as well as growth regulators. If seeds are uncoated, a chemical seed dressing can be applied using 20g of imidacloprid, 100ml of 50% phoxim EC, mixed with 4–5 pounds of water and 100 pounds of corn. Let the mixture sit for 4–6 hours, then dry slightly and mix with 100g of 50% carbendazim before sowing.
4. Proper use of herbicides and insecticides is crucial. Corn is vulnerable to insect damage before and after sowing. Commonly used herbicides such as B, A, and Metolachlor are widely applied, along with Yu Nongle and Ji Yu. Post-emergence herbicides should not be mixed with organophosphorus insecticides, and if used together, at least 7 days should pass between applications to avoid phytotoxicity and reduced effectiveness. To achieve both weed control and pest management, herbicides can be combined with pyrethroid insecticides like fenvalerate or marjoram. When applying pre-emergence herbicides, ensure proper coverage and increase water volume. This year’s wheat fields have higher plant density and more straw, making it harder for herbicides to work effectively. Adequate water is needed to maintain the herbicide film and ensure good weed and pest control.