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江苏盱眙县马坝镇郑友明、安徽界首县陆集乡丁明盛读者说,我家栽培了大面积梨树,但结果后,很多果实上都长满了一个个小钉子,卖不出又不好吃,每年白白浪费了大量的农药、化肥和土地面积。这是什么病,应该怎样治?湖北松滋市林业局434200高级工程师李继均答:梨果长钉的病,名为赤星
Zheng Youming, Mabu Town, Xuyi County, Jiangsu Province, and Ding Mingsheng, Luji Township, Jieshou County, Anhui Province, said that a large area of pear trees have been cultivated in our home. However, after the results, many fruits are covered with small nails and are not sold well Eat, wasted a lot of pesticides, fertilizers and land area every year. What is the disease, what should be treated? Forestry Bureau of Songzi City, Hubei 434200 Li Jijun, senior engineer A: Pear long spike disease, known as the star