![]() ![]() Within these lesions, on the surface of the cane, the fungus will produce small, black, embedded pimple-like structures which release fungal spores ( Figure 2C). ![]() These spreading lesions eventually grow together and girdle the cane, resulting in death of the portion of the cane above the lesion site ( Figure 2A, B). Once the pathogen enters through wounds, it can form lesions that spread through the vascular tissue of the plant. Furthermore, canes can also self-wound (especially thorned cultivars) by rubbing one another or by rubbing on the trellis wire in windy conditions, providing additional opportunities for the pathogen to gain entry. Wounds resulting from cane injury via pruning, machinery, insect damage, freeze damage, herbicide damage, or infection with other pathogens can all provide entry for the cane blight pathogen (Brannen and Krewer 2005). Unfortunately, in a typical caneberry planting, potential causes of wounding are abundant. This pathogen infects canes via wounds, and it has been suggested that without wounds for entry, resulting disease issues would be slight (Williamson 2017). Cane Blight Causal Agent, Infection Process, and Disease CycleĬane blight is caused the fungal pathogen Leptosphaeria coniothyrium (also known as Paraconiothyrium fuckelii). Damage may be associated with pruning cuts. Cane blight symptoms include dead/dying canes with a silvery or gray appearance.
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