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  2. It's peak hydrangea blooming season. Are your plants healthy?

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    "Orange spots that form on the bottom or the underside of the leaves are hydrangea rust," read Epic Gardening's hydrangea guide. "The top of the leaf will turn yellow and the leaf will eventually die.

  3. How To Care For Hydrangeas In The Winter So You'll Have ... - AOL

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    Oakleaf hydrangeas (Hydrangea quercifolia) are so named because their foliage is deeply lobed, resembling the appearance of an oak leaf. Smooth hydrangeas (Hydrangea arborescens) tend to have ...

  4. List of hydrangea diseases - Wikipedia

    en.wikipedia.org/wiki/List_of_hydrangea_diseases

    Bacterial leaf spot Pseudomonas cichorii: Fungal diseases. Fungal diseases; ... Hydrangea ringspot virus: Tobacco ringspot virus Tomato spotted wilt virus: References

  5. Here's When You Should Cut Back Your Hydrangeas For Winter - AOL

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    When To Prune Old Wood Hydrangeas. Old wood hydrangeas include fan favorites like climbing hydrangeas, oak leaf hydrangeas, and big leaf hydrangeas.These are shrubs that begin growing next year's ...

  6. Verticillium wilt - Wikipedia

    en.wikipedia.org/wiki/Verticillium_wilt

    In tomato plants, the presence of ethylene during the initial stages of infection inhibits disease development, while in later stages of disease development the same hormone will cause greater wilt. Tomato plants are available that have been engineered with resistant genes that will tolerate the fungus while showing significantly lower signs of ...

  7. Peronospora hyoscyami f.sp. tabacina - Wikipedia

    en.wikipedia.org/wiki/Peronospora_hyoscyami_f.sp...

    The observation of downy mold in the lower surface of the leaf is the most reliable symptom of blue mold. Downy mold carries thousands of small reproductive units called conidia [2] If conidia forms at different spots in the seedbed an outbreak is more than likely to occur. The symptoms usually take place before it's obvious.

  8. Sclerotinia sclerotiorum - Wikipedia

    en.wikipedia.org/wiki/Sclerotinia_sclerotiorum

    White mold affects a wide range of hosts and causes sclerotinia stem rot. It is known to infect 408 plant species. As a nonspecific plant pathogen, [3] diverse host range and ability to infect plants at any stage of growth makes white mold a very serious disease. The fungus can survive on infected tissues, in the soil, and on living plants.

  9. 'Hydrangea hysteria': Last week's chill may have ... - AOL

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    The horrendous chill wreaked havoc on hydrangeas, roses, lavender, and heaths and heathers. We only saw a few hydrangea blooms in my corner of the world last year, a sorry state of affairs that ...

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