Drosophila is the main pest of red bayberry, and female oviposititis lays eggs on the mature red bayberry fruit milk column, and the hatched larvae feed on the food. Damaged fruits are uneven, fruit juice spills and fruit drops, yields decline, quality deteriorates, and affects sales, storage, processing, and commodity prices. 1. Drosophila Occurrence Regularity Bayberry fruit flies have a generational duration of 4 to 7 days at 21 to 25°C and humidity of 75% to 85%. Overlapping generations in the field, it is not easy to divide algebra, each coexist at the same time, in the temperature above 10 °C, visible Drosophila adult activity. Prior to the coloring of the hard seeds of the bayberry fruit, the fruit cannot become the food of the fruit fly, the food source conditions are poor, and the fruit flies occur less, and do not cause harm. After Yangmei entered mature stage, the fruit became soft and the fruit flies had proper foods. The damage occurred during the peak period. With the harvest, the bayberry gradually decreased and the number of fruit flies decreased. After the red bayberry was harvested, the fruit of the tree and the fallen fruit of the tree were rotted. There was a lot of food and there was a period of prosperous growth. With the gradual disappearance of the fruit and fruits, the population of worms decreased with the lack of food. . The fruit fly of Drosophila melanogaster occurs in the excellent period of two food conditions in late June and late July. The economic damage caused by the occurrence of damage in the middle and late June. 2. Control methods for fruit flies 1 Weeding on Yangmei Garden in the middle and late May, and spraying the surface with 50% phoxim EC at 1000 times, reducing the number of insect sources, and reducing the occurrence; 2 The physiological fruit drop before maturity of bayberry In the ripe harvesting period, the rot and fruit are picked, and the thick soil is sent out at a certain distance outside the garden or sprayed with 30% trichlorfon emulsifiable concentrate 500 times, which can avoid the hazards of returning to the park after its survival and reproduction; 3 in Yangmei The hard seed coloring of fruits enters the mature stage, with 1.82% royalfacyanide heavy smoke agent according to 1:1 water, spraying smoke on the ground with the puffing machine to smoke on the ground, and killing insects with good results; 4 using fruit flies The adult chemotaxis was formulated with 1:10:10:10:20 of trichlorfon, sugar, vinegar, wine, and fresh water, and was placed in Yangmei Garden with plastic ampoules, 6-8 钵 per mu, to seduce adult worms. . Regular removal of trapped insects and replacement of bait once a week can result in better trapping effect.
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