Bacterial Leaf Blight

Description

Bacteria are spread to African Violets by insects and improper handling. Virtually all bacteria attacking Violets are classified as bacilli. Bacteria will often enter through wounds where leaves have been eaten or broken, but bacteria can also enter through leaf pores (stomata). Bacteria thrive in warm, moist conditions. If left untreated, Bacterial Leaf Blight can be fatal to African Violets.

Distinguishing Symptoms

• Leaves have soft, oozy, "water-soaked" spots on them. Infected tissue at these spots may drop out of the leaves.

If your African Violet exhibits this symptom, it probably has Bacterial Leaf Blight. To be sure, cut through an affected leaf with a sharp knife. If bacteria are at work, you will see gooey threads as you pull the leaf apart.

Other Symptoms

• Leaves have brown spots on them.
• Leaves pale. They appear yellow or grayish in color.
• Leaves have holes in them. When Bacterial Leaf Blight is at work, these holes will appear where the "water-soaked" spots have "eaten" through the leaves.
• Plant growth is slow.

Treatment

First, isolate all infected plants. Then, using a sterilized cutting tool, remove all affected foliage. Disinfect your cutting tool between cuts with a 10 percent bleach solution, i.e., one part bleach to nine parts water.

Prevention

Always wash hands before handling your Violets. Before repotting, disinfect pots with a 10 percent bleach solution, and pasteurize potting soil.

Do not overwater, and avoid watering from the top. A self-watering device, which waters from the bottom, is highly recommended.

Do not overfertilize.

Avoid extreme temperature changes.

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