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近年来笔者在辽南果产区调查,发现果园附近建起了桧柏苗圃或用桧柏绿化环境,从而引起了苹果树锈病大发生,造成极大经济损失。光明山镇赵家村一个体苗圃大量培植桧柏苗出售。虽然获取一定经济效益,但却给附近果园带来了意想不到的祸患。1991年全村80多处果园连同各农户庭院的苹果树全部发生锈病,发病株率高达80％,病叶率为15—30％。与桧柏苗圃相邻的果园40年生的200株苹果树,满目一片黄色病斑,病株率100％,病叶率85％以上,烂果占总病果数的10％,严重
In recent years, the author conducted a survey in the fruit producing area of southern Liaoning and found that cypress cypress nurseries or juniper cypress trees were built nearby orchards, causing great occurrence of apple tree rust and causing great economic losses. Bright mountain town Zhao village a large nursery nursery stock sale. Although some economic benefits have been obtained, it has brought an unexpected disaster to nearby orchards. In 1991, more than 80 orchards in the village along with the peasant households in the garden of apple trees all rust, the incidence of strains up to 80%, diseased leaves rate of 15-30%. Orchard with cypress cypress nursery adjacent 40-year-old 200 apple trees, spotted a yellow lesion, diseased plants rate of 100%, sick leaves rate of 85% or more, rotten fruit accounted for 10% of the total number of fruit serious