Garden Wisdom Blog — category: Insects Pests and Diseases

Powdery Mildew is a fungal disease affects cucumber, squash, calendula, hollyhocks, zinnias, and many other garden plants. Small patches of grey appear on otherwise healthy looking leaves, and if it is not treated right away, the fungus will spread to cover the whole leaf, and then most of the leaves on the plant. Infected leaves cannot produce as much food for the plant as they should. Fewer flowers (and fewer fruits) are produced. Plants may become so weakened that they cannot survive winter. Powdery mildew is produced by a number of different fungi of the order Erysiphales. Their spores are...