At present, cotton has entered the bell-mouthing period and the beginning of the period. It requires a lot of fertilizer and water supply, and it is also a period of more pests. Through recent surveys of cotton fields in the cities of Susong County, Wangjiang County, and Anqing County, it has been found that the following major problems currently exist in cotton:
At present, there are many problems in cotton production, such as: lack of boron, potassium deficiency is common, some cotton fields too little cotton, cotton aphid horse damage is aggravating trend, fertilizer structure is unreasonable.
After autumn cotton fertilizer management: The goal is "Tender over August", autumn peach top is not premature aging. August is a period of heavy cotton bolls, with an average of 1 flower per day and a cotton boll for two days. It is the time when you need the most fertilizer and water in your life.
1, Pu Shi cover top fertilizer: General acres from 20-40 kg. The specific amount depends on the number of cotton bellies in early stages and the growth may be. In the early stages, there were many bells and knots, and there were many signs of premature death in cotton, and there were few bells in the early period and less greed for a long time. It is usually applied to the trench after rain or after drought.
2, after the top of the chemical control: After the top 7 days after the top mu with shrinkage 3-5 grams or 25% of the helper prime 12-20 ml. Promote the transmission of nutrients to buds, flowers, and bells of cotton, reduce nutrient consumption, reduce the shedding of the bells, and also effectively reduce the occurrence of axillary buds.
3, repeated application of foliar fertilizer. In the beginning of autumn to autumn, more than 40 days, every 5-7 days, spray a foliar fertilizer. At least 2 barrels of water per acre, each bucket of water can be equated with half a catty of urea plus potassium dihydrogen phosphate two or two, in the afternoon after 4:00 with a small hole nozzle spray, it is best gasoline engine spray. This technology can increase more than 100 pounds of seed cotton.
4, drought should be timely drought. Drought cannot wait for rain. Watering time for high-yielding cotton fields must be maintained until mid-to-late September.
5, timely removal of the old leaves, axillary buds. Improve ventilation and light transmission, reduce rotten peaches.
Post-Autumn Disease and Pest Control:
1. Current main insect pests: cotton thrips, cotton bollworms, Spodoptera litura, spider mites, and aphids are common pests. There are many leafy leafworms in places where there are many fruit trees, and whiteflies are found in places with more vegetables. For piercing and sucking pests, such as cotton thrips, aphids, whiteflies, etc., it is advisable to use 20% of the dimethicillin or imidacloprid produced by Dachang. For the pest larvae of cotton bollworms and night moths, it is recommended to use good quality bell-type agents containing fluoride.
2. Prevention of diseases during the period of bolling: First, prevent the second peak of blight in autumn and rain. The second is to prevent boll blight, anthrax, keratoderma, red rot, pinkish pink and black fruit disease that cause bad bells. When encountering this kind of autumn rain, it should be promptly sprayed with agents such as Guanyinqing, Thiophanate, Iodine, and Potassium permanganate. And promptly rule out water, arrange the old leaves, or push the plant and ridge.
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