False Blossom
Cranberry false blossom virus
13 host plants
Last updated
You notice abnormal flower development on cranberry cotoneaster. This stubby blossom disorder shows up occasionally but lacks clear management strategies in current research. When present, it causes cosmetic flower defects. If plants are otherwise healthy, the issue generally remains minor and doesn't require intervention beyond general plant care.
Good sanitation is your most effective tool against false blossom. Remove and dispose of infected plant material, clean up fallen debris, and sterilize your pruning tools between plants. Reduce leaf wetness by watering at soil level and spacing plants for adequate air movement. These practices reduce the pathogen load in your garden over successive seasons.
Quick Reference
Management
Infection occurs when virus is transmitted to healthy plants via unknown vector or infected propagation material. Symptoms become apparent at flowering time when affected flowers fail to develop properly (spring/early summer). Once infected, plants remain infected indefinitely with recurring annual flower/fruit failure. Young plantings infected at establishment show symptoms at first flowering. Source: WSU HortSense
Symptom expression affects flowering and fruit development. Infected flowers fail to develop properly. Environmental stress and plant age may influence symptom severity. Systemic infection in plant causes consistent flower/fruit failure. Source: WSU HortSense