1. Calonectria pseudonaviculata infection
Likelihood: HighThe fungus directly infects leaves and young twigs. It produces characteristic lesions and fruiting bodies when conditions are wet, and it can kill foliage quickly under favorable weather.
Identification
- remove_circle_outlineCircular tan to brown leaf spots with darker margins; spots often develop a bleached center.
- remove_circle_outlineRapid defoliation starting on older leaves and progressing upward through the plant.
- remove_circle_outlineBlack pinpoint fruiting bodies visible on wet lesions with a hand lens or after rain.
- remove_circle_outlineTwig cankers and dieback where infected leaves fall but twigs remain symptomatic.
