氣溫及降雨日數對葉稻熱病的影響
Other Title
Effect of Air Temperature and Number of Rainy Days on Rice Leaf Blast
Journal
中華農業研究
Journal Volume
29
Journal Issue
1
Pages
21-25
Date Issued
1980-03-03
Date
1980-03-03
Author(s)
蔡武雄
Wu-Hsiung Tsai
Abstract
67、66 及65 年第一期作葉稻熱病在插秧後50、63 及60天開始發病，在插秧後62、72 及69 天發病開始增加，在插秧後90、81 及90 天發病達到最高峰。溫度及降雨日數為影響稻熱病發生最主要的因子，水稻生育前期的日平均溫度在20℃ 以上適宜發病，發病前七天的日平均溫度在19~25℃ 之問。67 年從發病開始30 天內的降雨日數為16 天，發病率達93.5 % , 66 年降雨日數為2 天，肢病率為40.1 % ，65 年降雨日數為3 天，發病率為58.2 %。
The rice leaf blast occurred at 50, 63 and 60 days after transplanting (DAT) in the first crop of 1978, 1977 and 1976 under the field condition. The level of disease started to rise at 62, 72 and 69 DAT, reaching a peak at 90, 81 and 90 DAT, respectively. The major factors which affected the disease were air temperature and number of rainy days. An average air temperature above 20°C at early rice growing stage was found favorable for the disease occurrence, and the daily average of air temperature during the seven-day period before the disease first appeared fell within 19-25°C. The numbers of rainy days during the 30 day period following the disease occurrence in 1978, 1977 and 1976 were 16, 2 and 3, and the highest disease incidences were 93.5, 40.1 and 58.2%, respectively.
Publisher
農業試驗所
Type
journal article
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