|Title:||Effects of Host Variety, Plant Maturity, Soil Temperature, and Soil Moisture on the Severity of Macrophomina Stem Rot of Jute||Other Titles:||黃麻品種，植株成熟度，土壤溫度及土壤濕度對立桔病發生之影響||Authors:||Yung-Hsiung Cheng
|Issue Date:||8-Dec-1972||Publisher:||農業試驗所||Journal Volume:||21||Journal Issue:||4||Start page/Pages:||273-279||Source:||農業研究||Abstract:||
Stem rot, caused by Macrophomina phaseoli (Maubl.) Ashhy (Scierotium bataticola Maubl.), is one of the most important diseases of jute (Corchorus capsularis) and kenaf (Hibiscus cannabinus) in Taiwan. the organism is also known to cause root and stem diseases of many economic crops, notably charcoal rot of soybean (Glycine mix), corn (Zea mays), and sorghum (Sorghum Vulgare), and root rot of cotton (Gossypium hirsutum). The epidemics of Macrophomina diseases in relation to environmental factors has been discussed in some crops. Edmunds reported that no infection in soils, occurred when the available soil moisture was above 80%, but the infection, as evidenced by abundant sclerotial production, was so severe as up to 25%. Cotton plants subjected to water stress were more susceptible to the disease than plants watered normally. In sugar pine (Pinus lambertiana), infection occurs early and results in death of a large number of seedlings at 35°C.
本省目前推廣之黃麻4品種中並無完全抗立枯病品種。臺農3號具中等抗病性，其次爲臺農選1號，再次爲臺農1號，而以臺農2號最爲感病。黃麻自發芽後14日內可因(Macrophomina phaseoli (Maubl)Ashby之侵染產生嚴重幼苗根腐型立枯病，但自30日後黃麻根部對立枯病病原菌之侵染具有抵抗性，即使極感病性品種（臺農2號）亦未見有根腐型病徵。
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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