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杜鹃黄化,在江淮地区发生十分普遍,尤其是在春夏之交的高温多雨时节,新叶缺绿更是明显,它不仅可以引起枝梢的枯萎,而且发病严重时还会导致一定程度的死株现象。杜鹃的黄化与枯萎,就其病因而言,向来较为复杂,若仅以缺铁而一言以盖之,恐难令人信服,因为在防治上若真补铁,往往奏效甚微。这里,笔者想就自己多年实践所感,与有兴趣的同行们一起商榷之。
Cucumber cucumber is very common in the Jianghuai area, especially during the hot and rainy season at the turn of the spring and summer. The lack of new green leaves is more obvious. It not only causes the withered branches, but also causes a certain degree of serious Dead phenomenon. The yellowing and withering of rhododendrons have always been complicated in terms of their etiology. If ironclad deficiencies were to be covered in words, it would be hard to convince people that the iron supplement in the prevention and treatment often did not work very well. Here, I would like to feel for many years of their own practice, and interested colleagues to discuss it.