First, clean gutter drainage. Corn is afraid of drought but it is not resistant to soiling. Long-term waterlogging of corn will not only rot the roots, rotten leaves, but also cause diseases, especially in the pollination period, it will affect pollination. Therefore, it is necessary to dredge Tiantougou, Weigou and Yaogou to eliminate waterlogging and promote the normal growth, development and maturation of corn. Second, weeding weeding. More rain will cause all kinds of weeds to prosper. When the ground is white after reclamation, we should step up tilling and weeding to remove the build-up. The big bell-mouth period looks at the growth of corn, with 15-20 kg of urea per acre. Maize ear stage timely supplement of appropriate amount of micro-fertilizer is generally sprayed with 0.2% zinc sulfate per acre for whole plants, sprayed once every 5 to 7 days, and sprayed twice. Third, artificially assisted pollination. The low temperature of cloudy rain and high density of plants, and some pollen grains with a small amount of pollen, tight clams, and poor silking may affect pollination, resulting in poor seed settling rates (people commonly known as thin rice dumplings) and long baldness. Therefore, in the pollination period, in case of cloudy and rainy temperatures, artificial raining should be carried out on a sunny day at 10 to 13 o'clock without artificial rain. Artificial breaks should be made for varieties with long pods, tight pods, and poorly spun silk. Fourth, prevention and control of pests and diseases. Due to the accumulation of water in the fields, the soil moisture is saturated, and the air humidity is high, and various diseases such as rust, stalk rot, spot leaf disease, and corn borer are easy to occur. For diseased corn fields, it is necessary to spray once every 10-15 days and apply 2-3 times. Rust prevention and treatment agents are 25% Kehui EC, 20% Triadimefol; the control of armyworm insecticides are trichlorfon, dichlorvos, bt emulsion and so on.
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