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Fruit Spray Schedules for the Homeowner

Blueberries

Blueberries

Blueberries
Dormant sprays

Apply when buds begin to swell.

Phomopsis

  • Material
    Lime sulfur

Blueberries
Green tip sprays

Apply when leaf buds are showing 1/4-inch green tip.

Stem blight, mummy berry

  • Material
    captan

Blueberries
Pink bud stage and 25 percent bloom sprays

Stem blight, anthracnose, mummy berry

  • Material
    captan
  • Comments
    Unless mummy berry or anthracnose is a problem, an intensive disease spray program is usually not necessary.

Blueberries
Full bloom sprays

Stem blight, anthracnose, mummy berry

  • Material
    captan
  • Comments
    See comments in "pink bud" stage.

Blueberries
Petal-fall and cover sprays

Apply first cover about seven to 10 days after petal fall, about every 10 days thereafter if needed

Plum curculio

  • Material
    carbaryl
     
  • Comments
    Plum curculio larvae feed inside berries; infested fruit ripen prematurely and drops to the ground. Infestations of plum curculio are often more abundant when blueberries are near pome and stone fruits. Apply insecticides at petal fall and 10 days later.

Cherry and cranberry fruitworms, scale

  • Material
    carbaryl
    or permethrin
    or pyrethrins and rotenone
    or spinosad
    or Bacillus thuringiensis
  • Comments
    Insect pests of blueberry are rare in much of the region; scout before applying insecticides. Unneeded applications of insecticides can create problems where none existed.
    Spinosad and Bacillus thuringiensis for worms only.
  • Days between last application and harvest
    Table 2

Japanese beetle

  • Material
    carbaryl
    or malathion
    or permethrin
    or pyrethrins and rotenone
  • Days between last application and harvest
    Table 2

Stem blight, anthracnose, mummy berry

  • Material
    captan
  • Comments
    See comments in "pink bud" stage.

G6010, reviewed March 2011

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