You must use fungicides before the mildew appears or as soon as you notice it because they do not normally succeed in getting rid of established mildew. The leaves of my bee balm plant are covered with a white substance. Also called bergamot and Oswego tea, it was the plant the American colonists used when they stopped using black tea in protest of British taxation. Skip to Left navigation Skip to Main content Skip to Footer, Extension > Garden > Diagnose a problem > What's wrong with my plant? Use regular hydrogen peroxide that is available at drugstores. Examples of resistant species include 'Violet Queen,' 'Marshall’s Delight,' 'Gardenview Scarlet' and 'Stone’s Throw Pink,' according to studies conducted by the University of Vermont. Learn which plants thrive in your Hardiness Zone with our new interactive map! To avoid the problems powdery mildew can cause, select a cultivar that has been shown to resist this disease. All Rights Reserved. Fill a spray bottle with water, and then add two to three cloves of crushed garlic. Powdery mildew is the culprit. Grow your bee balm plant in soil that is moist, slightly acidic and rich with organic materials to keep it healthy and better able to resist plant diseases such as powdery mildew. It’s a small, attractive plant with red flowers, which attract butterflies, bees and hummingbirds. Although this plant prefers moist soil, mildew is more likely to occur when its leaves get wet. Bee balm is the common name for a fragrant flowering plant in the Monarda genus. Keep the growing area cleaned up of leaves and other plant parts that have fallen due to powdery mildew. Spray with hydrogen peroxide. Do not use more than 1 part milk to 9 parts water because if the milk content is higher than 30 percent, it will cause another fungus to grow on your plant. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. Spray your bee balm with a combination of milk and water once each week if you notice a fuzzy white or gray coating on the leaves, stems or flowers. Examples of effective commercial fungicidal products include myclobutanil (Eagle) and triadimefon (Bayleton or Strike). Bee balm is the common name for a fragrant flowering plant in the Monarda genus. Black fruiting pods may appear on these leaves, which then cause leaf fall. Spray your plant with a purchased fungicide, such as one with potassium bicarbonate. Stir 1/2 cup milk, either skim or whole, into 1 gallon of water and then drench your plant thoroughly. Although this plant prefers moist soil, mildew is more likely to occur when its leaves get wet. Plant your bee balm plants far enough from each other to allow good air circulation, which will help prevent powdery mildew. The leaves eventually brown and die. The University of Vermont reported that their studies showed that sulfur, neem oil and baking soda are ineffective mildew treatments for bee balm plants. Black spots on maple leaves, treatment This fungus impacts the leafage and forms black spots on the topside of maple tree leaves. Barbara Fahs lives on Hawaii island, where she has created Hi'iaka's Healing Herb Garden. Tiny black round spheres may be visible within white spots late in the season Spots typically start on lower leaves but can spread to cover the entire plant Severely infected leaves may be completely covered in white or grayish white fungi In some cases, leaves become curled or … Plant your bee balm plants far enough from each other to allow good air circulation, which will help prevent powdery mildew. Do not add diseased plant parts to your compost pile. She earned her Bachelor of Arts at University of California, Santa Barbara and her Master of Arts from San Jose State University. Ensure that the top and bottom of the leaves are covered with the solution.

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