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A Database for Triticeae and Avena
Two Point Data
GrainGenes Pathology Report: Black Point
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Black point describes the discolored appearance of harvested grain infected by fungi during kernel development. Infection is favored by humid field conditions (>90% relative humidity) while kernel moisture content exceeds 20%. Severity can increase for infected grain stored under humid conditions. Severe infections often reduce seed germination levels. Kernels darkened by black point fungi are considered damaged by USDA-FGIS grain grading standards with only 2 and 4 percent damaged kernels permitted in US No. 1 and No. 2 grades, respectively. Black point is more prevalent under irrigated than dryland conditions.
Soft white wheat kernels discolored by...
Conidiophores of Alternaria species (50x).
Conidia of (wild) saprophytic Alternaria species (10x40).
Larger conidia of Alternaria triticina (10x40)...
(1993) Winter wheat disease management
Insect and plant disease management handbook
(1987) Compendium of wheat diseases.
(1982) Compendium of barley diseases.