Blueberries

• Dormant sprays
• Green tip sprays
• Pink bud stage and 25 percent bloom sprays
• Full bloom sprays
• Petal-fall and cover sprays

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

Spotted wing drosophila

• Material
  spinosad
• Comments
  Late-maturing blueberry varieties are very susceptible. Insecticide treatment should begin when fruit first begins to color and continue through harvest. For more on SWD, see Lincoln University Cooperative Extension publication FS18A2013, Monitoring for Spotted Wing Drosophila (PDF).
• Days between last application and harvest
  Table 2

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.