Causes of Corn Lodging and Defense Measures

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one. Lodging causes the lodging of stems, lodging of stems, and broken stems. The main causes of lodging are high density, excessive use of nitrogen fertilizer, excessive irrigation or rainwater, damage to pests and diseases, and lodging or breaking caused by stalks encountering the wind.

two. Preventive measures

(a) Preventive measures

1. Choose the lodging-resistant pest-resistant varieties suitable for cultivation in this area.

2. Properly dense planting, enhance ventilation and light transmission, and promote root development.

3. The reasonable supply of water and fertilizers will enable sufficient water and fertilizer for the development of the ear to ensure the robust growth of the plant.

4. Strengthen pest control, especially the prevention and control of corn borer.

(B) Management methods after lodging

Immediately artificially straighten the corn straight down. The first and second internodes of the base of the corn stem are relatively fragile, and in addition, some of the root systems have been damaged, and breakage and increased root injury are avoided during erection. One person can straighten another person's roots to cultivate soil. We must try our best to follow suit. Procrastination is not only difficult to lift but also to lose growth. For corn, which is not very lofty, because the plant itself has a strong ability to regulate, it can usually stand upright and the arrangement of stems and leaves can be basically reasonable.

Strengthen water and fertilizer management Lodging corn Because of poor photosynthesis, physiological function is disturbed, affecting grouting consolidation. For a field that only weighs once, you can chase it once more. If the top dressing is not applied with potassium phosphate fertilizer, the plant can be sprayed with a 5000-fold solution of 1.4% fervidin, which is beneficial to the synthesis of protein and chlorophyll, and increases the corn grain fullness.

Strengthen disease and pest control After corn lodging, disease often occurs. Leaf diseases such as corn size lesions, rust, etc., water-informed grayish freckles appear in the early stages of the disease, and can be sprayed with 50% diureticin 500 times solution or 75% chlorothalonil 300 times solution. Every 7-10 days, spray twice or three times. Every hectare spreads the field with lime powder 225-300kg mixed fine soil 750kg, can effectively control the occurrence and spread of the disease. Timely control of corn borer, when corn horns, use 1.3% of carbofuran granules 7500-11250g per hectare, or use 3% of phoxim granules 3750g against fine sand 75-105kg to lose the heart.

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