1. Appropriate topdressing. The stage of fertilization is the period in which corn has the most fertilizer and the highest fertilizer requirement. The absorption of nitrogen, phosphorus and potassium accounts for 50%-55%, 52%-60% and 75% of the total absorption of corn. 85%. It is necessary to properly topdress according to the situation.
2. Reasonable irrigation. At the ear of corn, the water consumption is the largest, accounting for 30% to 35% of the total water consumption in the whole life. The water consumption intensity during the tasseling period is the largest, which is the critical period of corn water demand. Drought and water shortage will cause different degrees of production reduction, or even failure. Affect the output.
3. Early prevention and control of corn pests and diseases.
(1) Corn sheath blight: 2-3 leaves can be stripped at the early stage to control the spread of the pathogen, and the stem base is sprayed 2-3 times with 5% Jinggangmycin 1000 times solution.
(2) Large and small spot disease, brown spot disease: The disease is sprayed 2-3 times with 50% carbendazim or 70% methyl thiophanate 500-800 times solution.
(3) Prevention and control of corn borer, cotton bollworm, etc.: use phoxim granules or chlorpyrifos granules to be sprinkled into the heart at the big bell stage. In the ear stage, corn ear worms can be treated with 80% dichlorvos 100 times droplets. 2-3 drops per ear, the effect is better.
(4) Control of armyworm: The heart leaf can be sprayed with chlorpyrifos EC or cyhalothrin 1000 times solution.
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