Assessment of Yield Losses Due to Rice Sheath Blight at Different Inoculation Stages

水稻在不同接種時期對紋枯病之產量損失估計

蔡武雄(W. H. Tsai)

《中華農業研究》 23卷3期 (1974/09) Pp. 188-194

https://doi.org/10.29951/JARC.197409.0004

摘要

本報告爲水稻品種IR 833-6-2-1-1（早熟品種）在六個不同接種時期對紋枯病的產量損失估計之研究。水稻在移植後15天，30天，45天，60天，孕穗期及乳熟期接種的減產各爲7.95，7.15，6.05，10.78，11.73及1.85%，其產量、產量損失與發病率的關係，除乳熟期接種者外，其餘在移植後15天，30天，45天，60天及孕穗期接種者均頗一致。水稻由紋枯病而引起的產量損失爲極顯著。

並列摘要

Yield losses in IR 833-6-2-1-1 (an early maturing variety) due to sheath blight were studied at six stages of inoculation. A reduction in yield was 7.95, 7.15, 6.05, 10.78, 11.73, and 1.85% at 15, 30, 45, 60 days after seeding, at booting stage, and milk stage, respectively. The yield and yield loss were compatible with disease index at 15, 30, 45, 60 days after seeding and at booting stage. The reduction in yield was highly significant.