Black Vine Weevils

Facts, Identification, & Control

Scientific Name

Otiorhynchus sulcatus

Appearance

What Do They Look Like?

  • Size: Approximately 12 mm in length and ovoid in shape.
  • Characteristics: The antennae of these weevils feature elbows, their wings bear small pits, and they possess short snouts.
  • Color: They range from brown to gray in color and are covered with tiny hairs.

How Did I Get Black Vine Weevils?

Dropping temperatures may prompt a black vine weevil to crawl into the house through an open door or window. Homeowners can also bring these outdoor pests inside with their potted plants, or perhaps when the weevils hitchhike inside on clothing. Heavily landscaped areas, especially those with plenty of evergreens and rhododendrons, are most at risk for an infestation.

How Serious Are Black Vine Weevils?

When indoors, black vine weevils don’t cause any damage. They can’t bite humans and won’t transfer disease. However, the pests may ruin the visual appeal of houseplants. Most of the time, though, black vine weevils are just a nuisance for residents.

Signs of Infestation

Black vine weevils can be challenging to control. There are very few natural predators of this weevil species. Adults cause damage to the foliage of the plant, which may show notches from their activity. Larval activity is more difficult to detect since they are nocturnal in nature and tend to dwell in subterranean environments.

How Do I Get Rid of Black Vine Weevils?

What You Can Do
Pesticides may be sprayed upon the leaves of infected plants in order to address adult specimens. Contact a local agricultural specialist for guidance.

What Orkin Does
Your local Orkin technician is trained to help manage black vine 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 black vine weevils in their place…out of your home, or business.


Behavior, Diet, & Habits

What Do They Eat?
Adults feed on leaves and stems of plants, while larvae feed on fine and main roots. The feeding behavior of black vine weevil larvae causes more damage to affected plants than that of adults. Black vine weevils are known to attack various:

  • Herbs
  • Plants
  • Shrubs
  • Trees

Geographic Range
The black vine weevil is present in much of the northern United States, and is found throughout the state of Ohio.

Reproduction
Females emerge in early summer and will feed for about a month before laying eggs. She may lay almost 200 eggs in her life. The eggs hatch and the larvae feed on the roots of the plant. Larvae spend the winter in a dormant state and will pupate the following spring.

More Information
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