Blossom wilt is not usually one of the most important diseases of dessert and culinary apples but can be a significant problem on some varieties.
- The disease is much more prevalent on cider apples where most commercially-grown varieties appear to be susceptible and control measures are more difficult to implement.
- The fungus attacks flowers, and at high incidence, can reduce yields. If not controlled, the disease can rapidly build up to significant incidence over one or two seasons.
- Under favourable conditions on very susceptible varieties as much as 50‑70% of flowering spurs can be killed.