Managing Pests in Compost: Controlling Insects and Animal Visitors

Composting transforms waste into garden gold, but pests—insects and animals—can become problematic without proper management.

Insects in Compost: Normal vs. Problematic

Some bugs are inevitable. Poor construction or infrequent turning creates breeding grounds. Common compost insects:

• Stable flies: Resemble houseflies with protruding needle-like beak. Love wet straw, grass clippings, manure-straw mixes.
• Green June beetles: Metallic green, ~1 inch. Lay eggs in decaying organics.
• Houseflies: Prefer manure/rotting garbage but colonize composted lawn clippings too.

Some bugs aren't terrible, but populations can explode. Increase browns, add bone meal to dry the pile. Orange spray around the area deters flies.

Animal Pests: Raccoons, Rodents, Pets

Compost attracts animals as food and habitat. Prevention strategies:

• Turn frequently, maintain good brown:green ratio.
• Never add: Meat, meat byproducts, oily/cheesy/seasoned leftovers (rodent magnets), non-vegetarian pet waste, cat litter.
• Locate bins away from natural food sources (berry trees, bird feeders, pet bowls).
• Line bins with wire mesh.

Closed Bin Systems for Pest Prevention

Open systems work for some but are harder to manage. Enclosed, ventilated bins deter animals—digging under is too much effort for most. Closed systems also contain odors better.