Explanation:

- Early blight is a common disease caused by the fungus Alternaria solani.

- It primarily affects plants like tomatoes and potatoes.

- Option 1: Potato

- Potato plants often suffer from early blight, especially in warm and wet conditions.

- Symptoms include brown spots on leaves, which can lead to defoliation.

- Option 2: Ginger

- Ginger is generally not affected by early blight.

- Option 3: Cabbage

- Though cabbage can suffer from various diseases, early blight is not very common.

- Option 4: Cauliflower

- Cauliflower is more prone to diseases like clubroot.