水稻「穗枯病症」有關菌類之檢討

Abstract

近年來在稻作栽培地區，常見稻穗被汙染，變色或枯死之現象，對產量及品質之影響至鉅。筆者乃自本省各地區採集稻穗，經培養後鑑別寄生於稻穀上之菌類，發現之菌類種類頗多，但以Curvularia sp., Fusarium spp. 及Nigrospora sp. 等三種之出現頻度最高，除此三種以外尚有16種真菌類及細菌類出現，主要侵害莖部的Helminthosporium sigmoideum Cav. var. irregulare spp. 及Sclerotium oryzicola亦自稻穀上獲得。 Recently, the contamination, discoloration and dying of rice panicles often occured in rice-growing districtin Taiwan. It had great influence on rice yields qualitively and quantitatively. Panicles from different areas were collected for study.