Why do cherry fruit flies occur

Generally, the spring continues with low temperature and rain, and the fruit ripening period of cherry is delayed by 5-7 days compared with normal years. The egg-laying period of drosophila adults and the damaging period of larvae hatching are basically consistent with the fruit ripening period of mid-late ripening varieties, causing the fruit decay rate to increase significantly.

In normal years or under normal weather conditions, when a large number of adult fruit fly adults appear, most of the early-mature ripe cherry fruits have been picked. The number of pests is small and the harm is light. Fruit farmers often neglect prevention and control, resulting in the accumulation of insect population in the orchard year by year. Coupled with the large-scale cultivation of mid-to-late varieties in recent years, the harm has become more serious

Cherry fruit encounters low temperature and rainy weather during the growing period, which will reduce the toughness of the fruit cortex, which is conducive to fruit fly adult egg laying and larval hatching. The orchard management is extensive, the ventilation and light transmission conditions are poor, and potassium and trace elements are generally lacking in the middle and late stages of fruit growth Fertilizers, etc., can also lead to poor fruit development, reduced toughness of the epidermis, and cracking of fruit, which is conducive to adult eggs and larvae.

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