Spraying Blueberry Plants

Spraying is important to the survival of your plants. To handle potential diseases and pests, reference the guidelines below to know what you should spray, and when you should use it.

NOTE: This is part 9 in a series of 11 articles. For a complete background on how to grow blueberry plants, we recommend starting from the beginning.

Before you begin, read and follow all instructions on labels.

Natural Control

  • Serenade® Garden Disease Control for botrytis blight, powdery mildew, anthracnose and more.

When To Spray

Dormancy (late winter/early spring before leaves emerge)

  • Monterey Horticultural Oil for thrips, mites, sawfly (eggs) and scales.

On Foliage

  • Monterey Horticultural Oil for thrips, mites, sawfly (eggs) and scales.

At the First Sign of:

  • Hi-Yield® Vegetable & Ornamental Insect Control for fruitfly (drosophila), leafrollers, thrips and more.
  • Monterey Fruit Tree Spray Plus for aphids, mites, leafhoppers, spittlebugs, scale, thrips, fruit flies, powdery mildew, blight and more.
  • Natural Guard® Caterpillar Killer Spray w/BT for omnivorus leafrollers.
  • GardenTech® Sevin® Concentrate Bug Killer for aphids, mites, lygus bugs, spittlebugs, blueberry maggot, scales, sawfly, leafrollers, leafhoppers, Japanese beetles, mites, weevil and more.

Bud Swell (or when buds have loose scales)

  • Hi-Yield® Captan 50W Fungicide for botrytis gray mold or berry rot and mummy berry.

Bud break (green tip--DO NOT apply after early bloom)

  • Ferti-lome® Broad Spectrum Landscape & Garden Fungicide for mummy berry and anthracnose.

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Tools & Supplies for Blueberry Plants