论文部分内容阅读
苹果烂果原因及防治徐平，彭秀珍（卢龙县林业局０６６４００）１９９４年，在秦皇岛地区的苹果发生大面积烂果，烂果轻者在２０％左右，严重的果园几近绝收，在经济上造成很大损失。据调查，中熟品种的发病率比晚熟品种为重，造成烂果的病害主要是轮纹病、炭疽病和霉心病...
Causes and control of apple rotten fruit Xu Ping, Peng Xiuzhen (Forestry Bureau of Lulong County 066400) In 1994, a large area of rotten fruits were found in apples in Qinhuangdao. About 20% of rotten fruits were light, Economic caused great losses. According to the survey, the incidence of medium-maturing varieties than late-maturing varieties as the main cause of rotten rot diseases are ring rot, anthracnose and mold heart disease ...