Pruning and Pest Control—In ​​the cotton buds' boll period, the tops of the heads, group tips, and ineffective flowers and buds that are removed during field management are taken out of the field to reduce field eggs and insects by 40 to 60%. Wiping eggs and disinfestation - In the early days of the bollworm eggs, the eggs are wiped off line by frame, wiped every three days, and even wiped 3 to 4 times, the eggs can be reduced by 60 to 80%. Irrigation and disinfestation - In the flood season of cotton bollworm, when combined with drought irrigation, the mortality rate of alfalfa can reach about 70%. Fertilization and extermination—In the spawning period of cotton bollworm, the leaching solution of calcium superphosphate is used as foliar spray fertilizer, which can reduce the amount of eggs laid in the cotton field by 33.3 to 74.4%, with an average of 55%. The cultivator eliminates insects and cultivars. When cultivating at the right time in the cotton growing season, it can destroy the dormitories, kill the insects and reduce the emergence rate. Put bee exterminators - When the rate of egg plants in the cotton field reaches 5% or so, 15,000 Trichogramma bees will be released per acre. After every 4 to 5 days, they will be released once every 3 to 4 times. The control effect can be controlled. Up to 69 to 100%. Light trapping - According to the phototaxis of the cotton bollworm, a black light lamp is installed to trap adult insects every 20 to 30 mu of cotton field, which can reduce the amount of eggs laid in the field by 20 to 30%. Artificial insect catching - When the density of the remnants is high after the control of the loss of time or after the control of the chemical, the people are mobilized to catch the older larvae in the cotton field. The effect is obvious.
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