|Subject||Darkling Ground Beetle|
Darkling ground beetles reportedly damage young vines by feeding on wounds on the trunk occasionally made by cultivating tools. They may start to feed on fresh, succulent tissue exposed by a recent cut, or if a wound has started to heal, they will feed on callous tissue. In either case, they extend a wound slowly around the trunk and to a lesser extent up and down the trunk, eventually girdling the vine. Such girdles are often 5 to 7.5 cm (2 to 3 inches) wide.
In the southern San Joaquin Valley (west side and south of Arvin) these beetles have been known to defoliate and kill vines grown for propagation. Another ground beetle, possibly Eleodes spp., has been a problem in areas bordered by native rangeland.
Bentley W., and Phillips P. 1992. Darkling Ground Beetle. Page 242 in: Grape Pest Management, 2nd edition. University of |