Botrytis Blight

  • Symptoms

    • Petals turn brown and fall. Leaf spots form, especially where faded petals have fallen. Flower buds are killed before opening.
  • Management

    • Space plants to insure good air circulation. Maintain low humidity. Avoid watering late in the day. Remove crop debris. Apply chlorothalonil, iprodione, mancozeb, or vinclozolin.

Cercospora Leaf Spot

  • Symptoms

    • Tan spots with reddish-brown halos develop on leaves.
  • Management

    • Water in a manner that keeps moisture off the leaves. Worried about using chemical on your plants? Try our All New Organic PureSpray Green. A great way to control leaf spot on your Hydrangeas.

 

Cercospora Leaf Spot on Hydrangea


Powdery Mildew

  • Symptoms

    • Yellow areas form on leaves. These may become purplish. White, cottony fungal growth forms on the lower surface of the leaf.
  • Management

    • Apply our All New Organic PureSpray Green. It effectively controls Powerdery Mildew.

Powdery Mildew


Virescence

  • Symptoms

    • Flowers are green and may be stunted. Leafy shoots grow from the flower parts. Plants decline and die.
  • Management

    • Remove ANY infected plants. Maintain good insect control.

Virescence affecting Hydrangea


Viruses

  • Symptoms

    • Leaves may be mottled, have yellow spotting, dead flecks, line or ringspot patterns. Plants may be distorted or have flower color breaking, or few flowers.
  • Management

    • Plant virus-indexed cuttings. Maintain good insect and mite control. Remove infected plants.

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