Plant pests and diseases
Primula vulgaris (syn. P. acaulis, primrose): Blighted plants in aggregated pattern
Cause: Undetermined
Location: Turkey
When diseased plants appear in discrete clusters, it suggests a soilborne etiology, such a nutrient toxicity or deficiency, a soilborne plant pathogen, or wet soil.
Here, diseased plants are on the downslope or at the lower end of the planting area, which suggests wet or waterlogged soil. Hence, a likely cause of the disease is root rot, caused by a fungal plant pathogen or a Stramenolipa such as Pythium.
Alternatively, splash-dispersed plant pathogens may create such clusters of diseased plants versus aerially dispersed pathogens that can create more random patterns.
Photograph by VATAN AŞKIN
Primula vulgaris (syn. P. acaulis, primrose): Blighted plants in aggregated pattern
Cause: Undetermined
Location: Turkey
When diseased plants appear in discrete clusters, it suggests a soilborne etiology, such a nutrient toxicity or deficiency, a soilborne plant pathogen, or wet soil.
Here, diseased plants are on the downslope or at the lower end of the planting area, which suggests wet or waterlogged soil. Hence, a likely cause of the disease is root rot, caused by a fungal plant pathogen or a Stramenolipa such as Pythium.
Alternatively, splash-dispersed plant pathogens may create such clusters of diseased plants versus aerially dispersed pathogens that can create more random patterns.
Photograph by VATAN AŞKIN