行政院農業委員會台南區農業改良場  研究彙報第19號

水稻稻熱病在嘉南平原之發生

黃杉茋 杜金池

摘  要

嘉南平原水稻稻熱病之發生為害以一期水稻為主,二期水稻雖亦發生,但不嚴重。其發生量:一期水稻之葉稻熱病發生面積8,600公頃,佔栽培面積之12.63%。穗稻熱病為3,500公頃,佔4.96%。二期水稻葉稻熱病為730公頃,佔栽培面積之0.71%。穗稻熱病為340公頃,佔0.33%。區域性之發生,一般而言以靠山地帶及一帶平地之發生較重,沿海地帶雖有發生但較輕。

一期葉稻熱病之發生,自2月中旬開始至3月上旬大幅開始進展,4月上、中旬為發生最高峰期。穗稻熱病之發生自4月中旬開始,而至5月下旬、6月上旬為發生最重時期。


The Outbreaking of Rice Blast (Pyricularia oryzae Cav.) in Chia-Nan Area

S. C. Hwang and C. C. Tu

Summary

       Rice blast (Pyricularia oryzae Cav.) mainly attacked on the first crop of rice in Chia-Nan area.  The second crop of rice could be attacked by rice blast but not serious. There were 8600 ha and 3500 ha of rice attacked by leaf blast and panicle blast, and occupied 12.63% and 4.96% of the total cultivated acreage, respectively.  There were 730 ha and 340 ha for leaf blast and panicle blast, and occupied 0.71% and 0.33% of the total cultivated acreage, respectively in second crop of rice.

       The outbreak of rice blast was much serious in mountain area or general cultivated area, but less in seashore area. The right outbreak seasons for leaf blast were from mid of February to mid of April but the panicle blast was from mid of April to June.



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