Q:

What causes the black spots on hydrangea leaves?

A:

Black spots on the leaves of hydrangeas are usually caused by a fungal infection named Cercospora hydrangeae. While these blackened spots are mainly an aesthetic issue, the fungus can reduce vigor in the affected hydrangeas and cause premature leaf drop.

Black spots caused by fungus typically start toward the bottom of a plant and slowly work upward until the entire plant is affected. Spots are characterized as circular and small and, in most cases, are scattered throughout each leaf. Minimizing leaf wetness by watering only at the ground can help control the spread of this fungal disease, as can removing dead and dying foliage from the plant and around its base.

Sources:

  1. ugaurbanag.com

Is this answer helpful?

Similar Questions

  • Q:

    What causes hydrangea leaves to turn yellow?

    A:

    There are three reasons the leaves of a hydrangea plant would turn yellow: water issues, nitrogen deficiency and iron chlorosis. Water issues are the easiest to fix, but it is still possible to restore the leaves from the other two conditions as well.

    Full Answer >
  • Q:

    Why do I have black spots on my gums?

    A:

    Black spots on the gums can occur as a result of bruising, hyper-pigmentation, amalgam tattoos or hardened plaque, according to HealthGuidance. Although black spots on the gums are typically only a cosmetic concern, in very rare cases they can be a symptom of oral malignant melanoma, the worst type of skin cancer.

    Full Answer >
    Filed Under:
  • Q:

    What causes white spots on toenails?

    A:

    New Health Guide explains that white spots on toenails can be caused by injury, allergic reaction, zinc deficiency, calcium deficiency, fungal infection or illness. In most cases, white spots, also called leukonychia, are not a cause for concern. However, if the spots appear frequently or in patterns, MDhealth.com warns that medical attention is necessary to track down the exact cause.

    Full Answer >
    Filed Under:
  • Q:

    How do you get rid of black toenails?

    A:

    Black toenails are often caused by a fungal infection called onychomycosis. Fungal nail infections are treated with oral antifungal drugs and medicated nail polishes or creams, according to Mayo Clinic. In some cases, the nail is surgically removed or treated with laser and light-based therapies.

    Full Answer >
    Filed Under:

Explore