Gardening Articles: Care :: Pests & Problems Peach Tree Borer by
National Gardening Association Editors Adult moths are 3/4"
long. This photo shows an adult peach tree borer, a blue-black
moth. The moths' inch-long caterpillars damage trees by boring
into the bark at or near soil level. The first indications of
its presence are small piles of sawdust around the base of the
tree. Sometimes a gummy sap oozes from holes. This pest also
attacks almond, apricot, flowering cherry, nectarine, and plum
trees. Mature trees can tolerate some damage; young trees are
most vulnerable. Peach tree borer is mostly a problem in
California, but can occur wherever peaches grow. Prevention and
Control In spring, make frequent checks of tree trunks near the
soil line for evidence of borers. If you find a hole, probe
inside with a stiff wire to kill the caterpillar. After leaves
fall in autumn, spray horticultural oil as directed on the
product label. Encourage parasitic wasps by providing habitat.
Photography by Eugene E. Nelson,