Vine Diseases and Pests

Question 1

What diseases were brought from the New World to European vineyards?

Answer 1

Phylloxera

Downy Mildew

Powdery Mildew

Question 2

What are the similarities and differences between Phosphorous deficiency and Leaf-roll Virus?

Answer 2

Both produce red discoloration and a curling of the leave’s ends

Phosphorus deficiencies usually manifests before flowering while leafroll symptoms appear later in the season