The Indian meal moth (Plodia interpunctella) is the most common pantry pest in Arizona homes and the most frequently reported stored-product insect in the United States. Adults have a distinctive two-tone wing pattern — the outer two-thirds are reddish-brown with a copper sheen, the inner third is pale gray — making them easy to identify. Larvae are the damaging stage: they spin silken webbing through infested food, contaminating cereals, flour, dried fruit, nuts, spices, chocolate, and pet food. A single infested package brought home from the grocery store can establish a colony that spreads to every pantry item within weeks.

Eliminating an Indian meal moth infestation in an Arizona home requires a systematic approach. First, inspect every item in the pantry — including sealed cardboard boxes, which larvae can chew through. Discard all infested products in sealed bags outside the home. Vacuum pantry shelves thoroughly, paying attention to corners and cracks where pupae hide. Wipe shelves with a diluted white vinegar solution. Pheromone traps (sticky traps baited with Indian meal moth sex pheromone) are highly effective for monitoring and reducing adult populations — place them near the pantry and replace every 3 months. Store all dry goods in airtight glass or hard plastic containers to prevent re-infestation.

Indian meal moths thrive in Arizona's warm climate year-round, but infestations peak in summer when temperatures accelerate the life cycle from egg to adult in as little as 25 days. The moths are often first noticed flying near light sources at dusk. If pheromone traps and pantry cleanout do not resolve the infestation within 4–6 weeks, a professional pest control inspection is warranted — larvae can migrate into wall voids and adjacent rooms, making the source difficult to locate without experience. Pest Control Bros LLC serves Maricopa, Chandler, Mesa, Tempe, Gilbert, and Casa Grande. Call (520) 424-5244 for a free inspection.