Cucumber Beetles

Also known as: Striped and spotted cucumber beetles

Identification

Striped: yellow with 3 black stripes, 6mm. Spotted: yellow-green with 12 black spots, 6mm. Found on cucurbit flowers and leaves.

Damage

Chewing — feed on leaves, flowers, and fruit; vector for bacterial wilt (lethal to cucurbits)

Best Organic Solutions (Ranked)

Solutions ranked by reliability tier — start with Tier A options.

Spinosad Tier A

Most effective organic option — apply in evening

Pyrethrin Tier A

Fast knockdown

Kaolin Clay (Surround) Tier B

Preventive barrier before beetle arrival

Neem Oil Tier A

Antifeedant reduces damage

Biological Controls

Beneficial nematodes for soil-dwelling larvae. Tachinid flies.

Prevention

Row covers from transplanting until flowering begins. Trap crops (Blue Hubbard squash). Delayed planting to avoid peak emergence.

Common Mistake

Removing row covers too early. Keep covers on until plants flower and need pollination — bacterial wilt transmission occurs during early feeding.