10 common fungal diseases 

The Best Feeds Garden Center Guide to Summer Vegetable Garden Diseases.

There are several common diseases that can affect vegetable gardens during the summer months.

Powdery Mildew: This fungal disease appears as a white powdery coating on the leaves of plants, including cucumbers, zucchini, and squash. It thrives in warm and humid conditions.
Tomato Blight: Tomato plants are susceptible to various types of blight, such as early blight and late blight. These fungal diseases cause dark spots on leaves, stems, and fruits, leading to their decay.
.Bacterial Leaf Spot: This bacterial disease affects several vegetables, including tomatoes, peppers, and cucumbers. It causes dark, water-soaked spots on leaves, which may eventually turn brown and lead to leaf drop.
Downy Mildew: Primarily affecting cucumbers, zucchini, and other vine crops, downy mildew appears as yellow patches on the upper surface of leaves and a grayish mold-like growth on the underside.
Rust: Rust diseases affect many plants including roses, beans and ornamental plants.  It's easy to spot by the orange or red-ish brown patches on leaves.  
Leaf Spot: Leaf spot is common and just as the name suggests, it causes round spots on leaves. It's seen a lot on tomatoes and roses. 
Anthracnose: This is used to describe a wide range of dark, sunken spots on leaves, stems and roots.  It affects a wide range of plants including trees, vegetables and fruits. 
Gray Mold: Mostly gray mold affects strawberries, grapes and ornamentals, and just like the name says, it's a fuzzy gray mold. 
Wilt: Wilt affects many crops and causes wilting, stunting growth and yellowing or browning.
Root Rot: Causes  stunted growth and die back of plants. 


To prevent and manage these diseases, it's important to practice good garden hygiene, including proper watering techniques, crop rotation, and removing infected plants or plant debris. Additionally, using disease-resistant varieties, providing adequate spacing between plants for airflow, and applying organic or chemical controls when necessary can help keep your summer vegetable garden healthy.