Yellowing Leaves - Vegetables

Yellowing leaves is a very generic plant symptom. There can be many causes including diseases, environmental, insect, or nutrient deficiencies. The following are common causes of leaf yellowing on vegetable plants:

Environmental/Cultural

- Drought or Waterlogged Soil

- Fertilizer/Pesticide Burn

- Nutrient Deficiency

- Normal Aging of Older Leaves

- Tipburn

Disease

-Fungal and Bacterial Diseases

-Wilt Diseases

•      Fusarium Wilt 

•      Bacterial Wilt

Insects

- Harlequin Bug

- Spider Mite

- Squash Bug

- Whiteflies