核桃是陕西省丹凤县的主要经济作物之一,近年来种植规模已达到36.7万亩,年产量650万kg,产值达1.3亿元。随着栽培面积的不断扩大,核桃黑发生逐年加重,每年损失核桃大约在65万~120万kg,造成的经济损失在600万元以上,直接影响了山区农民的经济收入。 Walnut is one of the major cash crops in Danfeng County of Shaanxi Province. In recent years, the planting scale has reached 367,000 mu with an annual output of 6.5 million kg and an output value of 130 million yuan. With the continuous expansion of cultivated area, the incidence of walnut black has been increasing year by year, with an annual loss of about 650,000 to 1,200,000 kg of walnuts and an economic loss of over 6,000,000 yuan, which directly affects the economic income of peasants in mountainous areas.