WSU Extension

Hortsense

Blueberry
 
Disease
Botrytis blight 
Mummyberry 
Viruses 
Insect
Aphids 
Brown marmorated stink bug 
Leafrollers 
Lecanium scale 
Spotted wing Drosophila (SWD) 



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Caption: Aphid adults
Photo by: E.P. Breakey
  
Blueberry : Aphids
(revision date: 3/10/2017)


Biology
Aphids are small, soft-bodied, pear-shaped insects. They may vary in color from yellow to green to pinkish. Aphids typically feed in colonies on leaves and shoots, often preferring the newer growth. Severe infestations may cause leaves to turn yellow and wilt or show other signs of water stress. Repeated severe aphid infestations can weaken plants. Feeding aphids often produce large amounts of honeydew, a sweet, sticky material which may attract ants or become covered with a dark growth of sooty mold. Honeydew and sooty mold can reduce the quality of fruit.
Management Options


Non-Chemical Management
  • Encourage natural enemies including ladybird beetles, lacewings, syrphid (hover) fly larvae, and parasitic wasps. Avoid use of broad-spectrum insecticides which kill beneficial insects.
  • Hand-wipe to help control small, localized infestations.
  • Wash aphids from plants with a strong stream of water.
  • Control honeydew-feeding ants, which may protect aphid colonies from predators.
  • Provide proper nutrition. High levels of nitrogen in the foliage encourage aphid reproduction. Switch to a slow-release or low-nitrogen fertilizer when practical.
Select non-chemical management options as your first choice!

Chemical Management

Apply when aphids appear, repeat if necessary. Direct applications to undersides of leaves. Soaps may require several applications.

Listed below are examples of pesticides that are legal in Washington. Always read and follow all label directions.
  • Azamax Botanical Insecticide, Miticide, & Nematicide [Organic]
    Active ingredient: azadirachtin  |  EPA reg no: 71908-1-81268
  • Bonide Eight Insect Control Garden & Home R-T-U
    Active ingredient: permethrin  |  EPA reg no: 4-406
  • Safer Brand Insect Killing Soap Conc II [Organic]
    Active ingredient: potassium laurate  |  EPA reg no: 42697-60
  • This list may not include all products registered for this use.
Images

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Caption: Aphid adults
Photo by: E.P. Breakey
Caption: Aphid colony
Photo by: Unknown
Caption: Aphid cast skins
Photo by: R.S. Byther