Weevils are species of food-infesting beetles.
The adult rice weevil are brown in colour with red spots. They are 2 mm long, with oval shaped bodies. The rice weevil are able to fly.
The larvae have a folded body with a distinct head, and are legless.
The female rice weevils produce around 400 eggs during life time. They chew holes into grains to deposit their eggs. It takes 4 weeks for the hatched eggs to grow into adults. The adult rice weevils live close to 5 months.
Both adults and larvae can cause damage. They prefer whole corn, wheat, and rice. The grain mass and temperature rise are signs of infestation.
Adult bean weevils are brown in colour with linear spots. They are 3mm long and have oval shaped bodies. The bean weevil are able to fly.
The larvae have folded bodies and are legless.
The female bean weevils lay 70 single eggs near beans, which hatch in 10 days. The life cycle of the bean weevils is around 2 months.
Both adults and larvae can cause damage. They prefer whole dried foods. They do not feed on grain. Several larvae can bore into a single bean. Several round holes in beans are the main sign of infestation.
The adult granary weevils are dark brown in colour. They are 5mm long and have oval shaped bodies. The granary weevil are not able to fly.
The larvae are white in colour with distinct heads. They have folded bodies and are legless.
The female granary weevil produce 150 eggs during an eight-month-long lifespan. They chews holes into grain to deposit their eggs. It takes 4 weeks for the hatched eggs to turn into adults. Adults live around five months.
Both adults and larvae can cause damage. The granary weevil can attack wheat, corn, rye, oats, barley, and sorghum. The rise in grain mass and temperature and increased moisture levels are the main signs of infestation.