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- Hydrangea macrophylla is susceptible to several pests and diseases1234. These include:
- Bacterial wilt, which may blight the flower clusters and leaves, and can cause wilting and root rot14.
- Bud or flower blight, which infects dense flower clusters in wet weather or after frost1.
- Leaf spots, which can be caused by several genera of fungi134.
- Powdery mildew, which can cause white or grey powdery coatings on leaves and flowers24.
- Rust, which is a fungal problem that thrives in humid conditions and looks like round, orangish spots on the underside of hydrangea leaves34.
- Anthracnose, which can cause leaf spots and stem cankers34.
- Japanese beetles, which can cause skeletonization of leaves3.
- Spider mites, which can cause yellowing of leaves3.
Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Pests and Diseases Bacterial wilt may blight the flower clusters and leaves. The disease is worse after heavy rains and hot weather. If severe, wilting and root rot occur, followed by plant death. Bud or flower blight infects dense flower clusters in wet weather or after frost. Several genera of fungi cause leaf spots on Hydrangea.hort.ifas.ufl.edu/shrubs/HYDMACA.PDFFrench Hydrangea Pest or Disease Problems While generally free of pests and bugs, these plants are susceptible to deer damage. They can also develop leaf spots, bacterial wilt, bud blight, and powdery mildew (Erysiphe polygoni). Some of these problems can be from over fertilizing or underwatering.plantcaretoday.com/hydrangea-macrophylla.htmlGuide to Hydrangea Diseases and Pests
- Aphids Primarily a problem on new growth, aphids can be dislodged by spraying your plants with a strong blast of water from the hose. ...
www.hgtv.com/outdoors/flowers-and-plants/trees-a…'Prevention is key' – expert tips for dealing with 8 common hydrangea diseases
- 1. Powdery mildew Powdery mildew on hydrangeas is caused by fungal pathogens and shows as white or grey powdery coatings on leaves and flowers. ...
www.homesandgardens.com/gardens/hydrangea-d… 12 Hydrangea Diseases: How to Identify, Prevent, and …
Oct 5, 2023 · There are many different hydrangea diseases that may attack your plant, but knowing how to identify, prevent, and treat them is critically important. In this article, gardening expert and hydrangea enthusiast Jill Drago walks …
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This comprehensive guide covers common pests and diseases affecting hydrangeas, their symptoms, and effective treatment options. Pests such as aphids, spider mites, and scale insects can weaken hydrangeas by feeding on …
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Discover how to prevent diseases and pests on your Hydrangea plants. Learn about common issues like leaf spot diseases and controlling pests effectively.
Hydrangea Diseases - Penn State Extension
Nov 21, 2023 · Learn how to identify and manage common diseases of hydrangea plants, such as botrytis blight, cercospora leaf spot, powdery mildew, and more. Find out the symptoms, pathogens, and control methods for each disease.
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Hydrangea pest & diseases - Help and information on …
Jul 4, 2014 · Hydrangeas are generally pest and disease free but as with all plants sometimes they can be affected by diseases or pests. We have put together a list of the most common diseases and pests which you can refer to and try and …
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