Anthracnose of sweet orange is more serious. What are the control methods?

The biological characteristics of different citrus varieties are very different. This leads to great differences in resistance of citrus to anthracnose in the field. Therefore, when planting citrus trees, fruit farmers should not only consider their own market participants and prices, but also choose suitable varieties. According to the biological characteristics of the variety itself, choose the citrus variety that best reflects the ecological characteristics in the planting area. Only in this way can the production potential of varieties be fully exerted, diseases can be effectively prevented and controlled, and everything can return to zero.

Citrus anthracnose, also known as citrus peel disease, is a fungal disease of citrus. Waterlogged fruit trees with low terrain and weak water deposition are vulnerable to low temperature freezing injury, which mainly harms citrus leaves, tiny flowers and fruits, causing large-scale leaf shedding, a small amount of water accumulation and fruit rot, most of which are leaf damage. Citrus anthracnose mainly occurred from June 5 to April. Here are the characteristics of anthrax symptoms and related prevention and control methods.

Citrus anthracnose is mainly transmitted by air, insects and rain, and occurs in citrus fruit trees and ventilation holes through wounds under the conditions of high temperature and high humidity, sticky soil, poor soil, low terrain, poor drainage, local nitrogen content and weak tree potential. In addition, citrus anthracnose suffered from low temperature freezing injury in autumn and winter of the previous year, which flooded the orchard with high incidence and serious harm. In citrus fertilization, we should provide decomposed organic fertilizer or farmyard manure as much as possible, reasonably control it, increase phosphorus fertilizer under the application amount of nitrogen fertilizer, recommend soil testing and formula fertilization when conditions permit, cultivate the vigorous growth potential of trees, improve the stress resistance of trees, strengthen the drainage irrigation management of citrus orchards and prevent local flooding. In addition, chemical fertilizer can be applied 7- 10 days before citrus picking in winter, and flower bud fertilizer can be applied in time to promote the germination and maturity of citrus branches, which can enhance the tree vigor and improve the disease resistance of fruit trees themselves.

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