Bean Weevils

Facts, Identification, & Control

Latin Name

Acanthoscelides obtectus

Appearance

What Do They Look Like?

Bean Weevil Illustration
Bean Weevil

  • Color: Bean weevils are faint olive in color, although darker shades may be visible on their wings. Their antennae appear reddish in coloration.
  • Legs: They have ruddy legs and their hind legs bear spiny protrusions.
  • Characteristics: These pests are hairy and shaped like teardrops. They do not possess telltale jutting snouts that are present on true weevil species. In comparison to rice and wheat weevils, bean weevils are rounder in form.

How Did I Get Bean Weevils?

Bean weevils may enter homes in search for food. Because they are attracted to light, these weevils can be found near windows of infested structures. Infested beans can look almost identical to healthy ones, so residents often bring these pests into homes inside purchased goods. Farmers may mistake infested beans for healthy ones, as the presence of these pests are not commonly recognized until empty husks are found within harvested crops.

How Serious Are Bean Weevils?

Food waste is one of the biggest issues with bean weevil infestations. Mold grows as a result of their feeding, contaminating beans and peas. Larvae consume almost all of a bean’s contents, leaving behind nothing but an empty shell.

Signs of Infestation

Signs of a bean weevil infestation include finding adult weevils themselves and damaged beans.

How Do I Get Rid of Bean Weevils?

What You Can Do
If a bean weevil infestation is found within your home, it may be useful to:

  • Clean Infested Areas: Sweep or vacuum pantries and cabinets. Discard all infested products.
  • Seal Food in Storage Containers: Store foods in leak-proof glass, metal, or hard plastic containers.

What Orkin Does
Your local Orkin technician is trained to help manage bean weevils and similar pests. Since every building or home is different, your Orkin technician will design a unique program for your situation.

Orkin can provide the right solution to keep bean weevils in their place and out of your home or business.


Behavior, Diet, & Habits

Although commonly referred to as bean weevils, the Acanthoscelides obtectus technically belongs to a cadre of seed beetles.

What Do They Eat?
These insects will feed on dried bean products, including:

  • Cowpeas
  • Lentils
  • Peas

Where Do They Live?
Bean weevils commonly live and infest inside dried beans in:

  • Bean crop fields
  • Home pantries
  • Packaging facilities

Life Cycle
Female bean weevils penetrate developing bean pods in order to lay their eggs. Entry portals are then sealed, and hairy, white larvae are left inside to develop. In favorable, warm conditions, larvae feed on beans within which they were laid only until the husk remains.

Following pupation, newly developed adults pierce through these beans in order to emerge. Through this process, beans are destroyed.

Boll Weevils

Flour Weevils

Rice Weevils

Wheat Weevils

Black Vine Weevils

Rose Weevils

White Pine Weevils