Rice Weevil

The rice weevil is one of the most serious stored grain pests worldwide. Originally from India, this beetle has been spread globally through the commercial shipment of goods. Both the adults and larvae will attack wheat, corn, oats, nuts, beans, cereal and pasta. They prefer tropical and subtropical climates, but can thrive in nearly any region when they infest foods that are stored indoors. Rice weevils are small, measurin g only about 1/16th of an inch in length, and have a long slender snout that measures nearly 1/3rd of their body. Adults can vary in color, but are typically reddish-brown to black with four light yellow or reddish spots on their back. They are decent fliers, and are attracted to lights.

Adult rice weevils live an average of 4 to 5 months. Despite their short lifespan, rice weevil infestations can grow quickly, with females producing about 4 eggs per day that can mature to adulthood in as little as one month. When fully developed adults emerge from seeds or kernels, they leave behind a single round hole that can indicate when an infestation is present. The most important step in controlling this pest is to locate and address the source of the infestation. This can be challenging due to the broad range of items that may be infested such as grains, pasta, bird seed, dry plant arrangements, decorative items containing dried foods, and even toys or beanbags stuffed with grain. The best preventative measure against rice weevils is to store goods in glass or plastic containers that have a tight-fitting lid.