1) Black vine weevil adult              2) Adult leaf damage             3) Girdled stem

BLACK VINE WEEVIL - Black vine weevils (genus Otiorhynchus) can be serious pests on many plants such as rhododendron, azalea, rose, and yew. The larvae feed on roots stunting plant growth. Large roots and stems can be stripped of bark and girdled. The adult weevils chew the edges of leaves or tip of needles and prefer older, interior foliage to younger growth. Because they have no wings these weevils spread by crawling or being carried to new plants. A variety of insecticides are used to control this insect. Foliage is sprayed in May and June to control the adult weevils. Soil drenches can be applied from July to mid-October.

 

This web site was created for the Morris Arboretum of the University of Pennsylvania's Plant Clinic.
Created by C. Hetzel and revised by S. Eisenman on 3/7/02.
URL = http://www.upenn.edu/PaFLORA/Plantclinic/blackvineweevil.html