Particularly, the disease will be noticeable on infected plants as soon as the hop shoots start to emerge with the latent period being approximately 10 days at 12 and 15 °C compared to 5 days at 18-27 °C. These spore-covered shoots that emerge from infected buds are called “flag shoots” and will be stunted with distorted leaves. Periods of rapid plant growth are the most favorable for infection.
Particularly, the disease will be apparent on infected plants as soon as the hop shoots begin to emerge with a latent period of around 10 days at 12 and 15 °C compared to 5 days at 18-27 °C. These spore-covered shoots that arise from infected buds are referred to as “flag shoots” and will be stunted with distorted leaves. Periods of rapid plant growth are the most favorable for infection.