WSU Extension

Hortsense

Broccoli, Cole crops
 
Disease
Black rot 
Clubroot 
Downy mildew 
Oedema 
Insect
Aphids 
Cabbage maggot 
Flea beetles 
Imported cabbageworm 
Loopers 
Thrips 



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Caption: Flea beetle damage on kale
Photo by: C.A. Miles
  
Broccoli, Cole crops : Flea beetles
(revision date: 3/10/2017)


Biology
Flea beetles are small, brown to metallic black beetles with a habit of jumping like fleas when disturbed. They feed on many plants including beets, kale, collards, radish, and many weeds, particularly those in the mustard family. Small round holes are eaten in the leaves, usually early in the season. The larvae typically feed on underground portions of the host plants. Damage can be very severe on seedling plants.
Management Options


Non-Chemical Management
  • Keep garden and adjacent areas clear of weeds which may attract flea beetles.
  • Floating row covers may provide effective protection.
Select non-chemical management options as your first choice!

Chemical Management

Use product according to label instructions. Apply when beetles are first noticed.

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 Captain Jack's Deadbug Brew R-T-U [Organic]
    Active ingredient: spinosad (spinosyn A+D)  |  EPA reg no: 4-472
  • Bug Buster-O [Organic]
    Active ingredient: pyrethrins  |  EPA reg no: 1021-1771-54705
  • Bull's-Eye Bioinsecticide
    Active ingredient: spinosad (spinosyn A+D)  |  EPA reg no: 62719-314-56872
  • 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: Flea beetle damage on kale
Photo by: C.A. Miles
Caption: Cabbage flea beetle
Photo by: Unknown
Caption: Adult flea beetle damage on potato leaf
Photo by: Unknown
Caption: Adult flea beetle damage on potatoes
Photo by: S.J. Collman