论文部分内容阅读
桃穿孔病是各种观赏桃花常见的主要病害之一,也同时为害果桃、李、樱桃、杏等核果类植物。桃穿孔病包括细菌性穿孔病和真菌性穿孔病,前者发病最为普遍,全国各地均有发生。症状桃细菌性穿孔病主要为害叶片,也为害枝条和果实。叶片发病初期出现水渍状小点,后逐步扩大成圆形或不规则形的紫色或黑褐色病斑,直径约2毫米,病斑周边呈水渍状,有黄绿色晕环。而后病斑逐渐干枯并
Peach perforation disease is one of the most common pests of ornamental peach, but also pests of fruit peach, plum, cherry, apricot and other stone fruit plants. Peach perforation disease, including bacterial perforation and fungal perforation, the most common incidence of the former, all over the country have occurred. Peach bacterial perforation symptoms mainly damage leaves, but also damage the branches and fruits. The early stage of the leaves appear water-like small dots, and then gradually expanded into a round or irregular purple or dark brown lesions, a diameter of about 2 mm, lesions around the water-like, yellowish green halo. Then the lesion gradually dry and