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水稻纹枯病是一种极少为害穗部的病害。通过1984～1986年的试验研究表明:病斑高率与单株损失率的关系,水稻受纹枯病为害的反应型为耐害型。从探讨病斑高率与株发病率、株发病率与丛发病率的关系后,换算出早、晚稻的单位面积内的平均单株重,平均单株损失率、株发病率、有效穗数的积估计群体产量损失。从而制订出莲花县的防治指标是:早稻丛发病率为25%,株发病率为17%:晚稻丛发病率为15%,株发病率为8%。
Rice sheath blight is a disease that rarely damages spikes. Through the 1984 ~ 1986 experimental studies show that: the lesion height ratio and plant loss rate of the relationship between rice sheath blight-damaging response type for the resistant type. After investigating the relationship between the disease rate and plant disease incidence, the incidence of disease and the incidence of plexus, the average plant weight, average plant loss rate, disease incidence and effective panicle per unit area of early and late rice were calculated. The product of the estimated loss of population. Thus, the prevention and control index of Lianhua County was formulated as follows: the incidence rate of early rice was 25% and the incidence rate of plant was 17%. The incidence of late rice was 15% and the incidence of strain was 8%.