Disease on crop
fungalWalnut Anthracnose on black walnut
Ophiognomonia leptostyla
Fungal leaf disease causing premature defoliation in wet seasons, weakening trees over consecutive years and reducing kernel fill.
- Disease
- Walnut Anthracnose
- Pathogen type
- Fungal
- Crop
- Black Walnut
- Scientific name
- Ophiognomonia leptostyla
Walnut Anthracnose on black walnut
Detailed guidance for this section is being prepared. Check back soon.
Symptoms on black walnut
- ▸ Dark angular spots on leaflets
- ▸ Yellowing and premature leaf drop in midsummer
- ▸ Sparse late-season canopy
IPM controls
- ✓ Sanitation of fallen leaves (removes overwintering inoculum)
- ✓ Pruning for airflow
- ✓ Resistant rootstocks where available
- ✓ Tolerate on established trees if defoliation occurs after shell hardening
Other crops affected by walnut anthracnose
Related