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我县苹果于1975年秋从山东莱阳引进,现有1200余亩,80000多株。由于苹果原产寒带地区,移到温暖湿润地区后,因自然条件差异,芽枯病发生比较严重,影响苹果生产发展的速度和效益。为解决这一问题,我们在全县进行了调查,并提出防治办法。芽枯病表现有粗皮、芽枯和小叶三种类型。粗皮多发生在一年生新梢上,一般于7月中旬开始,7月下旬至8月迅速增加,初期表皮呈现青褐色水溃状的突起物,以后深入皮层下部出现褐色坏
Apple County in Shandong in the autumn of 1975, introduced from Laiyang, the existing 1200 acres, more than 80,000 strains. Due to the original cold region of apple, moved to warm and humid areas, due to differences in natural conditions, bacterial blight occurred more serious, affecting the speed and efficiency of apple production and development. In order to solve this problem, we conducted a survey in the whole county and put forward prevention and control measures. Bud blight manifestations are rough, bud and leaflet three types. Rough skin often occurs in the annual shoot, usually in mid-July, the rapid increase in late July to August, the initial epidermis appears brown water ulcer protuberances, after the deeper cortical brown bad