Mango fruit fly is one of the main pests of fruit in Youjiang District. The insect is miscellaneous and eats mainly woody fruit. The host plants include citrus, pear, carambola, alfalfa, peach, plum, guava and melon. More than 40 families and more than 200 kinds of fruits and vegetables. The worm lays eggs in the skin and eats fruit with larvae to rot the fruit, causing the fruit to crack, rot, and drop fruit in the field, or rot after harvesting, cutting the victim fruit, which can be found in the damage. Three to five generations a year, overlapped for generations, no significant overwintering phenomenon. The peak period of fruit damage is from late May to early July.
At present, mangoes in Youjiang District have entered young fruit stage, and mango fruit fly control should be well established. details as follows:
(1) Using bagging techniques to carry bagging and fruit protection in the young fruit period when it has not been harmed by insects can effectively prevent the fruit fly from spawning on the fruit, reduce the damage, and improve the quality.
(b) Trapping male adults. Use sexual attractants to kill adults. Using a plastic drink bottle to make a trap or fruit fly inducer, the fly attractant is dropped on the base paper in the trap, 1 ml per drop, and a small group of cotton balls impregnated with dichlorvos are placed in the trap at the same time, etc. After the attractant was completely absorbed by the original paper, the lid was tightened. Hang the traps in the crown of the fruit tree, about 1.5 meters above the ground, and hunt five traps per mu. If the trap is trapped in 3/4 bottles, the bottle insects must be removed and buried with soil. Supplement with fly traps and insecticides every 20 days. It can kill a large number of male adults in the garden, reduce the probability of females accepting male mating, and reduce the rate of hatching of females, so as to reduce the density of insect populations.
(c) trapping and killing adult sex. Methods of trapping and killing male and female adults. The first method is to spray fly light Guang II (Hubei Ruite Biotechnology Co., Ltd.), which sprays once a week during the period of insect pests, generally 7-10 times in a row; the second method is homemade poison pot trapping. The bait can be made by adding 80% of dichlorvos to a poisonous fruit bowl at a ratio of 500:1 with a juicy fruit or rotten fruit, and put 10 acres per acre for 7-10 days.
(D), crown spraying method
When the number of adults began to increase significantly from the flowering stage, it reached the peak of fruit maturity. In conjunction with the prevention and control of other diseases and insect pests, in the fruit orchard, when the number of insects per week reaches 10 or more, use low-toxicity and high-efficiency pesticides, such as 90% trichlorfon or 1% avermectin to poison the water 800 times, according to 30: 1 The proportion of brown sugar diluted liquid can be added. Every two rows can be sprayed for spraying, killing a large number of adults, and the fruit can be stopped 20 days before harvest.
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