Stored Product Pests
Stored product pests: There are many different types of stored product pests. The most common on campus include moths and weevils. These pests are brought home from the grocery stores in contaminated food, often in dried beans and corn, grains, or rice. One species of weevil, the sweet potato weevil, infests sweet potatoes.
Moths: Moth caterpillars range in length from the 7 mm grain moth up to the larger 12 mm Indianmeal moth. These cream-colored caterpillars can be mistaken for maggots. Maggots will not be found in dry foods. The caterpillars become yellowish-brown flying adults, which are 2.5 cm in length.
Weevils: Stored product weevils are small beetles with long snouts. These insects are smaller than the moths, being 2-4 mm in length. They are brown or black in color. This insect drills holes in beans and corn to insert its eggs.
Check any beans, grains, and rice for insects at the store before you purchase them. Infested sweet potatoes will have many holes in it. Do not purchase food if you notice any insects in the packages or on produce.