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陕西省岐山县苹果栽培面积4800hm2,年产商品果25.9万t,是陕西省苹果生产基地县之一。近年来,苹果炭疽病一直是本县苹果生产上的主要障碍因素,最重发生年份病果率高达29.2%,每年因其损失苹果4320t,直接经济损失1000多万元。受多种因素影响,自2003年以来,其发展呈平稳态势,为害逐年减轻。笔者分析了近几年的发生减轻原因,在总结大面积防治经验基础上,提出了防治策略。
Shaanxi Province Qishan apple cultivation area of 4800hm2, with an annual output of 259000 t of fruit products, is one of the apple production base in Shaanxi Province. In recent years, apple anthracnose has been the main obstacle in the production of apple in this county. The incidence of disease is the highest in the county as high as 29.2%. Because of the loss of 4320t apples per year, the direct economic loss of more than 10 million yuan. Affected by many factors, its development has been in a steady state since 2003, with the damage gradually decreasing. The author analyzes the causes of mitigation in recent years, and sums up the experience of large-scale prevention and control and puts forward the prevention and control strategies.