Wheat fungal pathogens (Erisiphe graminis, Septoria tritici) as well as several insect pests induce foliar necroses; as a consequence, the reduction of the active assimilative foliar area is causing the diminution of the yield quantity and quality. This reduction is directly correlated with the affected area of the leaves. The exact estimation of the lesions extension is important for the characterization of the genetic resistance of wheat races and the efficiency of the foliar fungicides treatments. The computer program is based on the utilization of color filters for the determination of the ratio between total foliar area and the area of the necroses. The utilization of the computer assisted image analysis enhances the precision of these estimations and excludes the subjectivism of the specialist’s visual assessment.

computer assisted image analysis; wheat; foliar necrosis

Presentation: oral