Grape diseases and physiological disorders.
- Downy mildew: It is caused by Plasmophora viticola.
- Powdery mildew: Caused by Erysiphe viti.
- 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.