Corn anti-fall countermeasures and management measures

Corn lodging is mainly caused by heavy winds or heavy rain or pests. After lodging, it will affect ventilation, light transmission and poor pollination. Measures should be taken in time to try to reduce losses.

First, prevent countermeasures

1. Appropriate deepening of tillage and deep tillage can promote the development of maize roots and deepen the soil, which can significantly reduce the degree of lodging in the later period.

2. Timely cultivating and cultivating the corn after the jointing stage of the corn can produce a large number of supporting roots, so that the root system is developed and the lodging is reduced.

3, reasonable fertilizer and water management fertilization should be based on base fertilizer, topdressing should not be too much, too early. Fertilizer should pay attention to phosphorus and potassium fertilizer. Seedling stage seedlings can shorten the upper part of the internode and the roots are deep into the soil. After the jointing, the amount of irrigation should not be too large to prevent the length of the person.

4. Reasonable close planting According to the characteristics of the variety, it is reasonably densely planted or adopting wide and narrow row planting methods to improve the development of the individual and reduce the lodging.

5. Spraying plant growth regulators When the corn is squirting, the upper leaves can be sprayed with the corn sulphate 50 ml dilution 75 kg/mu, which can inhibit the stalk internode elongation, promote the stalk thickening, develop the root system, and enhance the lodging resistance. ability.

Second, the management measures after lodging

1. Manually straighten the corn immediately after the artificial straightening. The first and second sections of the base of the corn stalk are relatively fragile, and some of the roots are damaged. When it is straightened, it is necessary to prevent breakage and increase root injury. One person can straighten another person to carry out root cultivation. Should try to follow the support, delays will not only help but also increase losses. For corn that is not very badly lodging, the plant can stand upright due to its strong ability to regulate itself, and the spatial arrangement of stems and leaves can be basically reasonable.

2, to strengthen the water and fertilizer management lodging due to poor photosynthesis, physiological functions are disturbed, affecting the filling and fruiting. For a field that only catches a fat once, you can catch another fat. If the first top dressing is not applied with phosphorus and potassium fertilizer, the plant can be sprayed with 14% high-yield 5000 times solution, which is beneficial to the synthesis of protein and chlorophyll and increase the fullness of corn kernel.

3, pay attention to the prevention and control of pests and diseases after the lodging of corn, often disease. Leaf diseases such as corn size spot disease, rust, etc., water-stained blue-gray spots appear in the leaves at the beginning of the disease, and can be sprayed with 50% carbendazim 500 times solution or 75% chlorothalonil 300 times solution. Spray once every 7-10 days, even spray 2-3 times. Use 15-20 kg of lime powder per acre and mix 50 kg of fine soil to spread the field evenly, which can effectively prevent the occurrence and spread of diseases. Timely control of corn mash, when the corn is flared, use 3% phoxim granules 250 grams of fine sand 5-7 kg of heart.

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