Updated: Apr 12
Powdery Mildew can affect eggplant / Brinjal. This appears as white, powdery spots on the Brinjal leaves which may turn yellow and die. Planting resistant Brinjal varieties when available, planting in full sun, and provide good air circulation.
Hornworms are sometimes an issue for Brinjal plants as are potato beetles, lace bugs, and mites. If the flowers on your eggplants form but then fall off, or if fruit does not develop these are symptoms of pests in the plants