Field Cricket vs. House Cricket
Field Cricket (Gryllus spp.)
Missouri's most common fall invader. Black or dark brown, 3/4–1 inch. Outdoor species that enters structures accidentally in large numbers in August–October. Dies quickly indoors. The loud chirping is adult males. Heavy pressure outdoors near the structure typically precedes indoor invasion.
House Cricket (Acheta domesticus)
Tan or yellowish-brown, slightly smaller. Can establish populations indoors given warmth and food — behind appliances, in basements, in utility areas. Unlike field crickets, house cricket populations indoors require active management rather than seasonal tolerance.
What Draws Crickets to Your Structure
Two factors drive cricket aggregation at structures: warmth and white-spectrum lighting. Field crickets are strongly attracted to incandescent and standard fluorescent lights — large populations develop at any foundation-level or entry lighting that is white or cool-spectrum. Switching exterior foundation lighting to yellow or amber LED bulbs (which crickets are far less attracted to) produces a measurable reduction in the number of crickets that accumulate at entry points. Landscape lighting directed toward the structure rather than away from it aggregates crickets against the foundation. Reorienting or shielding fixtures reduces the draw.
Perimeter Management
Granular perimeter insecticide applied to the foundation zone and the first several feet of lawn adjacent to the structure reduces cricket populations at the perimeter before they push inside. Apply in late August in Missouri — before peak cricket pressure in September. Crickets that die in the treatment zone attract brown recluse spiders, which are active predators of crickets; keeping cricket populations low in the garage and at the foundation perimeter secondarily reduces recluse pressure. D&D Pest Control provides fall perimeter programs for Franklin County and rural Missouri — visit ddpestcontrolmo.com.