Rainy season cotton management focuses on natural disaster prevention

Entering the flood season is the most vigorous period for cotton growth and development, and it is also a crucial period for determining cotton yield and quality. However, weather changes at this stage and frequent disasters, such as droughts, hailstorms, and hail, are more frequent, often causing some damage to cotton production. Production practice proves that to seize the high quality and high yield of cotton, it is the key to enter scientific management in the flood season.
After the appropriate period of chemical control enters the flood season, the cotton plants are prone to madness and cause the bud bells to fall off. In time, the growth of the cotton plants can be stabilized by the use of contractylamine or auxin, and the plant type can be improved and the number of knotted bells can be improved. The method is: when the cotton in the early stages of the rainy season begins to blossom, use 6 to 8 milliliters or 1 to 2 grams of methamphetamine per acre, and add 25 to 28 kilograms of water to mix 60 to 70 milligrams per kilogram of liquid spray. Into the middle of the rainy season (about the end of July to early August), about 3 grams per acre with DPC, spraying 30 to 40 kg of water. Note that spray-dried nodamine is not the same as hitting pesticides. It is required that the top of each plant or the top of the fruit branch is uniform in the amount of medicine, and the amount of water is less, which is based on no dripping water. It is generally required to spray after 3 pm or before 10 am to prevent evaporation at high temperatures. If there is heavy rain after spraying, it should be sprayed, but the amount is halved.
Control fertilizer and water into the rainy season, the cotton plant has both long branches and leaves, and the buds have become bell-shaped, and the requirements for fertilizer and water have reached a lifetime peak. Fertilizer should be topdressed in a timely manner to prevent premature aging of defertilizer. However, due to the abundant rainfall during the rainy season, it is extremely beneficial for all kinds of fertilizer effects to play, resulting in a long and mad growth of cotton plants. To do this, the top dressing should be done in such a way that there should be less or no application of adequate base fertilizer and a large amount of cotton seedlings, and attention should be paid to clearing the ditch to prevent waterlogging; the development of the cotton plants should be slow, the stems should be red to the top, and the leaves should be yellow The cotton field should be applied early and increase the amount of fertilizer, such as urea dosage is about 8 kg per mu. In addition, if a continuous drought occurs and the soil moisture content is less than 60% of the field water capacity, it should be ditched and watered in a timely manner.
For axillary buds and toppings Due to the accelerated growth of cotton plants in the rainy season, their axillary buds are also prone to occur. To this end, the buds should be wiped off in time for the rain to stop. When the cotton plant grows to a predetermined plant type and number of fruit branches, in order to break down and inhibit the growth of the top, reduce the consumption of nutrients in the upper non-effective branch, promote the development of bolls, etc., it should be timely (approximately mid-July) topping.
Timely prevention and control of pests and diseases occurred in various conditions, and rain conditions have a great relationship with rainfall. If the drought is not conducive to the hatching of H. armigera eggs and larval development, but a large amount of rain and precipitation will hinder the hatching of eggs, especially the heavy rain has a strong flushing effect on the eggs and newly hatched larvae. If the rainfall in the rainy season is small and even, it will help the outbreak of the bollworm. If there is little precipitation during the rainy season and the drought is severe, it will benefit the propagation of red spiders. On the contrary, if there is continuous rain during the rainy season, the cotton plant grows madly and severely, and the field is poorly drained. The cotton plants are susceptible to withering and verticillium wilt, and at the same time triggering the emergence of the rot disease. Therefore, the prevention and control of cotton pests and diseases, combined with the weather conditions in the rainy season, reasonable selection of pesticides, scientific prevention and control, can only do more with less.
Timely prevention and control of natural disasters After the rainy season, disasters such as droughts, waterlogging, hailstorms, and windy winds are extremely prone to happen. We must, on the basis of strengthening our defense, respond to irresistible disasters and take timely measures to save them. For example, the cotton fields damaged by hail shall be promptly filled with fertilizers to promote their recovery as soon as possible, followed by timely pruning, chemical control and pest control. For the cotton affected by the disaster, first, clean up in time, clear the drainage system, remove the water; followed by cultivator loose soil, timely fertilizer, increase the use of fertilizer, prevent detrimental aging; also do a good job in field investigations, timely control of pests and diseases.

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