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Gray Mold Control: Learn About The Treatment Of Botrytis Blight

Dummer. ゛☀
2017年08月08日
Botytris blight, also called gray mold, attacks almost any ornamental tree or shrub as well as many garden perennials. It usually occurs after an extended period of rain or drizzle in spring and summer. You may first notice it on dead and dying foliage and flowers. Continue reading to learn more about botrytis blight symptoms and gray mold control. What is Botrytis Blight? Botrytis blight on plants is caused by Botrytis cinerea, a fungus that attacks tender parts of the plant in the presence of high humidity.


Botrytis blight symptoms on flowers include spotting, discoloration and wilting. Buds often fail to open. It may look as though the flowers are old and fading. You can tell the difference between an old flower and one affected by botrytis blight by the pattern of discoloration and wilting. Browning from normal aging begins with the petals on the outer edge of the flower. If browning occurs on inner petals first, the cause is probably botrytis blight. Leaves and shoots with botrytis blight have brown lesions and masses of gray spores. Severely affected leaves and shoots die back, and the leaves drop from the plant. Fruit also rots and drops off.
Treatment of Botrytis Blight on Plants Treatment of botrytis blight begins with good sanitation. Pick up and destroy the debris that falls to the ground under the plant. This includes flowers, buds, leaves, twigs and fruit. Prune off and destroy infected parts of the plant. Disinfect pruners with a 10 percent solution of household bleach between cuts to avoid spreading the disease. Destroy infected plant material by burning, or bury the debris under at least a foot of soil if burning isn’t allowed in your area. Healthy plants have limited natural disease. Avoid growing conditions that cause stress as much as possible. Make sure the plant receives the proper amount of sunlight, water and fertilizer. Keep the foliage as dry as possible by applying water directly to the soil. Prune as necessary to allow good air circulation. You can achieve limited gray mold control with good sanitation and improved growing conditions, but the spores spread over long distances on the wind, making complete control difficult. Fungicides can help reduce the damage to valuable landscape plants.
Choose a product labeled for protection against botrytis blight and for use on the type of plant you are treating. Follow the label instructions carefully and store the product in its original container and out of the reach of children.
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