イネ紋枯病の病斑高率と発病株率による減収量の算出法

概要

論文の詳細を見る
A method to estimate the yield loss by rice sheath blight disease caused by Rhizoctonia solani Kuhn was investigated with ratio of the height of the lesions to the plant height and percentage of the affected hills. Whole disease incidence (D) at the maturing stage could be represented as product of disease incidence of affected hill estimated by ratio of the height of the uppermost lesions to the plant height (X) and percentage of affected hills (A) because it was calculated as D=(1.62X-32.4) A/100. On the other hand, the loss of fully ripened kernels has been estimated to be 8.5g per 3.3m^2 for each additional 1% disease incidence, from which the following equation was derived (L represents yield loss in kg per 10 ares). L=(41.31X-826.2) A/1000. The yield loss observed in paddy fields in 1976 to 1980 was in accord with that estimated by the formula.
日本植物病理学会の論文
1983-04-25