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.
- Oriental Cockroaches
- Oak Moths
- Orb-weaver Spiders
- Onion Maggots
- Ox Beetles
- Opossums
- Oakworms
- Olive Fruit Flies
- Oat Aphids
- Orange Dog Caterpillars
- Oyster Shell Scale
- Oakworm Sawflies
- Obscure Mealybugs
- Ornate Mites
- Oriental Rats
- Old House Borers
- Owlet Moths
- Orange Wheat Aphids
- Olive Moths
- Oregano Beetles
- Oleander Aphids