Grape diseases

Grape diseases and physiological disorders.

Diseases:

  • Downy mildew: It is caused by Plasmophora viticola.
  • Powdery mildew: Caused by Erysiphe viti.

Physiological disorders:

  • Hen & Chicken disease is due to the deficiency of Boron.
  • Berry or Blossom drop – Its main cause is Improper pollination & fertilization.
  • Pink berry formation- Due to High temperature. It is common in Thompson seedless.
  • Calyx end rot: due to the deficiency of Calcium.