Question: Recently, I received phone calls from many friends and said that when they grow corn every year, they will encounter problems with baldness. Some bald-tips are a couple of centimeters in height and some have a particularly severe baldness, which seriously affects the yield of corn. Very annoying. Therefore, I would like to ask what kind of measures should be taken to prevent the appearance of baldness.
Experts: The corn stick bald tip has a great influence on the yield and quality of corn. To prevent corn tipping, we must grasp the following five points:
1. The density should be reasonable. Too much density of corn can cause field canopy closure, poor ventilation and light transmission, lack of light in corn leaves, and the nutrients produced by photosynthesis can not meet the needs of the growth and development of corn stalks. When the spikes are differentiated, the florets are aborted and become bald. When corn is kept seedlings, proper planting should be done according to the characteristics of corn varieties. Generally big stick type varieties, 3,000 to 3,500 sticks of seedlings in Mu, 3,500 to 4,400 sticks of Mulliao seedlings of medium stick type, and 4,000 to 4,500 sticks of Mulliao seedlings are suitable. Recently, some farmers were found not to plant seedlings after sowing. This would increase the rate of baldness and risk lodging.
2. Timely pest control. Corn borer and other pests bite corn silk, seriously affecting pollination and causing baldness. To remove insect pests in time, use 4.5% beta-cypermethrin 1000-fold solution, or 2.5% kung-fu 1500-fold solution. Insects sucking corn sap, seriously affect the corn filling, causing baldness, can be used 10% imidacloprid 2000 times, or 5% acetamiprid 3000 times control.
3. Make up for attacking seed fertilizer. To make timely application of attacking seed fertilizer before the big bell-mouth period to pumping males, topdressing 15 to 20 kg of urea per mu, or 20 to 30 kg of nitrogen, phosphorus and potassium tri-element compound fertilizer.
4. Drought prevention and flood prevention. The weather should be watered in time to prevent drought. Rainwater should be drained in case of rain to prevent disasters.
5. Artificially assisted pollination. In the rainy days and hot weather, corn pollination was poor and the ovules could not be fertilized due to the bald tip. Artificially assisted pollination should be taken to increase fertility and reduce baldness.
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