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Bacterial leaf spot of bougainvillea

Mar 17, 2011 7:34 AM

Bacterial causal agent: Pseudomonas andropogonis (tentative)

Symptoms: Symptoms start as small reddish brown leaf spots which can be seen on younger foliage. Some of the lesions have a chlorotic halo around it. These lesions later on enlarges and forms dark necrotic spots. Leaves get distorted due to early infection of the newly expanding leaves. Leaf discoloration and necrosis can also be seen.

Management: Use healthy stock plants. Avoid overhead irrigation and late afternoon watering, and keep the foliage dry. Remove all the dead leaves from the plants and avoid overcrowding. The disease is spread by water splashing, handling and propagation from diseased stocks and thus sanitation is very important.