Begonia Flower Diseases. Among the most common. Sep 21 2017 Begonia Diseases Bacterial Leaf Spot.
Botrytis blight Botrytis. Aug 26 2019 Botrytis of begonia is also known as botrytis blight. Leaf spots are small and somewhat transparent.
Spray with a systemic fungicide.
A fungus Erysiphe cichoracearum causes powdery. Tiny thrips transmit tomato spotted wilt virus which causes poor flower. Another common begonia disease is powdery mildew. The common bedding plant Begonia semperflorens has low susceptibility while the hardy begonia B.