摘要
桉樹類如赤桉、玫瑰桉、尾葉按及細葉桉等，由於生長快速，近數年來已逐漸成為本省東部低海拔地區之主要經濟林造彬樹種，提供工業用纖維用材。本報告描述本省桉樹類在苗圃及造林地所發生之病害及非病原注桉樹異常，包括其病微、病原菌種類及病害發生情形，並綜合討論其嚴重性。報告之桉樹病害包括癌腫病、青枯病及小葉病等細菌注病害；苗腐病、角斑病、葉斑病、玫瑰桉葉斑病、葉銹病、灰黴病、褐斑病、枝枯病、潰瘍病及冠腐病等真菌性病害；此外非病原性病害包括紅斑病、流膠病、除草劑藥害、風害及遺傳性白化症等，以及病因不明之尾葉桉皺葉病亦在文內敘述之。文內報導之桉樹青枯病、小葉病、苗腐病、玫瑰桉葉斑病、葉銹病、枝枯病、潰瘍病及冠腐病等均為本省之新記錄病害。
並列摘要
Eucalyptus sp. Such as E. camaldulensis, E. grandis, E. urophylla and E. tereticornis are fact-growing tree species and since 1985 has become the major economic plantation species for wood fiber production at lower elevation areas in Eastern Taiwan. This report describe the diseases and disorders found in the nursery and eucalypt plantations including disease symptoms, the pathogens and the disease serverity. Reported diseases include crown gall, bacterial wilt, little-leaf, seedling blight, angular leaf spot, leaf spot, brown spot, leaf rust, grey mold, shoot blight, stem canker, and butt rot. Several non-infectious diseases including the leaf red spot, gummosis, herbicide in jury, typhoon damage and genetic albinism and an unidentified leaf crinkle disease are also described. Among the eucalypt diseased, bacterial wilt, little-leaf, seedling, brown spot, leaf rust, shoot blight, stem canker and butt rot are new disease records in Taiwan.