Occasionally, it can cause defoliation and premature ripening. Depending on the timing and severity of the infection, this disease can reduce the yield and quality of seed and fibre.
Most losses are due to premature ripening and loss of seed during harvest.
Crops Flax Biology Pasmo infections increase with prolonged wet periods in late summer and autumn. The pasmo pathogen is seed-borne. It also overwinters in the soil on infected flax stubble. Spores, dispersed by wind and rain, cause the initial infections on leaves and stems. It attacks above-ground parts of the plant.