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陇西县梨赤星病研究初报宋尔宽张双定宋瑞君（陇西县农技中心陇西７４８１００）中图资料分类号Ｓ４３６．４１５５０年代初，天兰铁路修通后，随着陇西铁路苗圃的建立和城镇、机关、工厂绿化工作的开展，我县各地大量栽植长绿树种桧柏和龙柏，导致梨赤星病普遍发生，为害...
Preliminary study on pear brown spot disease in Longxi County Song Erkuan Zhang Shuangding Song Ruijun (Longxi Agricultural Technology Center Longxi 748100) CLC S436.41550 In the early 1950s, after the Tianlan Railway was repaired, with the establishment of Longxi Railway nurseries and towns, Plant greening work carried out in large numbers throughout the county planted cypress and Cypress long cypress tree, resulting in pear brown spot disease is widespread, damage ...