稻品種與株齡對葉鞘腐敗病之感染性
Other Title
Rice variety and age in relation to the susceptibility to sheath rot
Start Page
271
End Page
277
Date Issued
1984-12
Date
1984-12
Author(s)
簡錦忠
曾方明
C.C. Chien
F.M. Thseng
Abstract
自典型葉鞘腐敗病病斑分離得菌株AO-3，另自不稔稻褐變葉鞘上分離得菌株AO-1；單獨或混合接種於不同株齡之臺農67號稻株結果，以孕穗期發病最嚴重。在田間人工接種17個水稻品種之感染穗率、不稔率及穀殼褐化率，品種間差異甚大，秈稻較稉稻為高，而臺農61號則最低。水稻之感染穗率、不稔率及穀殼褐化率之相關甚高。田間及溫室中單獨或混合接種，顯示二菌株之病原性並無差異。
Isolate AO-3 of Sarocladium oryzae obtained from typical lesions of sheath rot and isolate AO-1 from browning sheath of rice plants showing sterility symptoms were inoculated on cultivar Tainung 67 at different ages. Booting stage was found the most susceptible to sheath rot inoculated separately or in mixture of the two isolates.
Among the 17 cultivars tested, the percentage of infected panicles, brown-spotted grains and sterility of grains were found more on Indica than Japonica cultivars and Tainung 61 had the least. High correlations were found between the percentage of infected panicles, brown-spotted grains and sterility of grains. No difference in pathogenicity among AO-1, AO-3 and the mixture of the two isolated were observed from the results of the experiments conducted in the greenhouse and in the field.
Publisher
臺灣省農業試驗所
Type
book part
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