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松针红斑病是多种松树毁坏叶部的病害.其病原Dothistroma pini引起针叶感病凋枯.美国东部大平原栽植的西黄松,由于该病危害早期落叶,致使大部分造林成果失败.在大平原的中部和南部,红斑病常毁坏了作为圣诞树、防护林带和风景林的南欧黑松和西黄松.在加利福尼亚、俄勒罔和华盛顿州,此病摧毁了人工林中的美国黑松和辐射松.在爱达荷、蒙大拿和华盛顿的天然林中,美国黑松和西黄松病害也零星发生.在美国此病在苗圃幼苗中很少发现.然而,在大平原中部单独新栽植的松林中却观察到病害流行,表明初期感病是从苗木上开始的.这种病害在苗圃作为风景区造林较大的移植苗上是普遍的.
Pine needles erythematosus is a disease of a variety of pine-damaged leaves whose pathogen Dothistroma pini causes coniferous susceptibility to withered wilt.Phinifolia is planted in the eastern Great Plains of the United States, because the disease endangered early deciduous, resulting in the failure of most of the afforestation results. In the central and southern parts of the Great Plains, erythema often ruin the southern European pine and Pinus ponderosa, the Christmas tree, shelterbelts and scenic forests, and in California, Oregon and Washington, the disease destroys American black pine in plantations And Pinus radiata in the United States In the natural forests of Idaho, Montana and Washington, disease of the American black pine and Pinus and pardnensis also sporadically occurs in the United States rarely found in nursery seedlings However, in the middle of the Great Plains alone The epidemic was observed in the newly planted pine forests, indicating that the initial disease started from seedlings, a disease that is prevalent in nurseries as seedlings for transplant in scenic areas.