The Black Vine Weevil, Brachyrhinus sulcatus, as a Pest of Grapes in South Central Washington1

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Abstract
The black vine weevil (Brachyrhinus sulcatus (F.)) caused injury during 1961 to Concord grapes in south central Washington by feeding on berry pedicels and cluster stems. Injury resulted in reduced berry weight and loss of berries or portions of the cluster. Weekly counts on 20 tagged clusters per cover crop provided estimates of loss (tons per acre) for grapes grown in 5 different cover crops, as follows: no cover, 3.36; oats and vetch, 3.45; alfalfa, 2.42; creeping red fescue, 3.08; and creeping red fescue in combination with oats and vetch, 3.29. Weevils caught in specially designed funnel traps indicated B. sulcatus was closely associated with creeping red fescue as a cover crop. Injury in other cover crops was apparently the result or adult movement away from creeping red fescue.

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