大同县周士庄大队果园7,000株苹果树,常年腐烂病株率在1%以上。过去多用刮皮涂泥法防治,总不能根治。1983年,他们根据高温杀菌原理,并学习平顺县用汽车喷灯防治苹果树腐烂病的经验(见本刊1981年第9期——编者),改用重刮皮、电石灯消毒,再在伤口上涂蜡,对32株病树 Datong County Zhou Shizhuang brigade orchard 7,000 apple trees, year-round rate of diseased plants in more than 1%. In the past the use of skin scraping mud method of prevention and cure, the total can not cure. In 1983, according to the principle of high-temperature sterilization, they studied the experience of using apple-tree blowtorches to prevent and cure apple tree rot in Pingshun County (see Issue 9, 1981, editors) and switched to heavy scrape skin and calcium carbide lamps. Apply wax, on the 32 diseased trees