Pestipedia

Pests Beginning with O

This index features various insects, arachnids, and animals commonly considered pests, whose common names begin with the letter O. Click on a pest name to view detailed identification and control information.

A detailed list and link to more information on them is at bottom of the page

Household & Structural Pests (O)

  • Oriental Cockroach: Large, shiny black cockroaches that prefer cool, damp, dark areas like basements, sewers, and drains.
  • Odorous House Ants: Small, common house ants known for emitting a rotten coconut smell when crushed.

Garden & Agricultural Pests (O)

  • Oak Leaf Miner: Small moth larvae that create characteristic tunnels and blotches within the leaves of oak trees.
  • Onion Maggots: Fly larvae that feed on the roots and bulbs of onions, garlic, and related crops, causing plants to wilt and rot.

Arachnids & Others (O)

  • Orb Weaver Spiders (Nuisance): Spiders that build large, elaborate, circular webs in gardens, near eaves, and on porches.

Quick Tip: Oriental Cockroaches thrive in moisture. Reducing humidity and fixing leaky pipes in basements and crawlspaces is essential for control.