Middle and late management points of corn
I. Production technique at the ear stage 1, scientific management of fertilizer: generally in the big bell mouth Mushi ammonium bicarbonate 70 kg or 25 kg of urea. After fertilization, timely watering according to the sensation. Second, flower grain technology points Third, timely harvest to the time of disappearance of the endosperm of the grain as a sign of proper harvest. This period is about 40-50 days after the pollination of corn. At this time, the harvest is about 6-8 days later than the traditional harvest time, and higher yield can be obtained.
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2. Comprehensive pest control: In the middle and later stages of corn, it is mainly used to control corn borer, cotton bollworm, red spider and aphid. When the rate of corn borer in the heart and leaves is up to 10%, 50% phoxim EC 1 kg plus 50 kg of fine soil is mixed with 1% phoxim granules in the heart to prevent and control. 500 strains; when the rate of spider mites has reached 5%, 15 ml of alum is used to control the water and 15 kilograms of water is sprayed; for cotton bollworms in the corn field, a 400-fold drop of a pyrethrin pesticide is used. Spike filaments for prevention and treatment. When 9-11 crops of corn are unfolded, the mu should be sprayed with 12.5% ​​Prunus edulis WP or 20g or 15% triadimefon WP and 75 g water to 50 kg foliar to prevent brown spot disease.
1. Application of attacking granules: After the tasselling of males, application of attacking granules before flowering and pollination can promote grain filling and increase grain weight. Combined with water, Mu recovers 5-10 kg of urea. It is particularly important for high-yielding fields with more than 800 kilograms.
2, pouring a good grouting water: corn grain period, the rapid increase in grain volume, is a critical period of corn water demand. The drought in this period must be watered in time.
3, to Xiong: Vigorously promote the emasculation of corn, when the tassel is just exposed when the tip removed, emasculation is prohibited with leaves.