Finally got around to training a Chinook today and found a Downy Mildew infected shoot. Kinda odd because we haven't had any rain to speak of in a few weeks and the humidities have been relatively low. The number of shoots and the density of foliage on this particular crown most likely added to the disease manifesting itself. The first two pictures show the way the disease creates a mottled appearance on the leaves (lime green=infected portion).
The last picture shows how the disease compresses the shoot and the distance between internodes is drastically shortened compared to the unaffected shoot. Haven't had enough time to get anything preventative on up to this point but may have to make some time real soon. Hope the pictures help.
The last picture shows how the disease compresses the shoot and the distance between internodes is drastically shortened compared to the unaffected shoot. Haven't had enough time to get anything preventative on up to this point but may have to make some time real soon. Hope the pictures help.