Moth balls are an old-time remedy for the control of borers infesting the base of tree trunks and were often utilized to control peach tree borers in the fall 😉 Soil was loosened at the base of the tree, and moth balls or crystals were placed in a ring around the trunk, about an inch away from the base 🙌 A mound of soil was firmed around the base and fumes from the moth balls permeated the soil and penetrated the’s having holes made in the trunk by the borers, killing them in their tunnels 😊 The moth balls should be removed from young trees after two weeks in order to protect the bark. For older trees, with thicker bark the moth balls were kept in place until next spring.
Image on right: Adult dogwood borers (image at right) are tiny, clear-winged moths. These small insects appear from late May to September. The moths are most abundant in July and June. They mate, and their females lay eggs on bark. Image on left: The eggs hatch, and then the larvae. White to light Pink with a brown head capsule. They wander around until they locate an opening in bark. Uninjured bark is not something they can chew. Once they’re have finding an opening in the bark, they will tunnel through it to the cambium. Sapwood is unknown to be a food source for them. Different Borers stages of development All year, they can be found near bark wounds. Over winter in the tree They usually pupate in these areas before emerging the next spring. A larval gallery will have cocoons of silken strings that are covered with reddish frass. Rendy Delmarco updated this information on January 31, 2020
Dogwood borer larvae feed off the bark of healthy and living dogwood trees. Bark will eventually fall off if the damaged branch or trunk becomes too large. A single branch with leaves that turn red in mid-summer is an indication of trouble. Early sign Dogwood Borers. Infested branches will eventually die. Dogwood borers will often not infest your trees and limbs. Kill the tree The first year is the worst, though reinfestation can occur every subsequent year. Dogwood, elm and hickory are all targets. Lenna Gore updated this information on December 8, 20,21.
Terrence Zier at hgic.clemson.eduThis article explains how cultural controls can be used as the first line defence. Get started by raking up and destroying all fallen leaves. Prune dead or infected branches. Reduce overhanging branches, and other obstructions to sunlight and improve air circulation around trees. There are many resistant species and cultivars that can be used to plant new trees. Cultivars of the oriental dogwood Cornus kousa (such as ‘Milky Way’, ‘Milky Way Select’, and ‘National’) and many of the Cornus florida x Cornus kousa hybrids (such as ‘Aurora’, ‘Constellation’, ‘Celestial’, and ‘Stellar Pink’) are generally resistant to powdery mildew. The flowering dogwood (Cornus florida) cultivars ‘Appalachian Joy’, ‘Appalachian Blush ‘, ‘Appalachian Snow’, and ‘Appalachian Mist’ are very resistant to powdery mildew. ‘Cherokee Brave’, ‘Springtime’, and ‘Pygmy’ have partial resistance. The same applies to all other flowering canewoods in C. Florida. Powdery mildew can be fatal to red-twig dogswood (C. Sericea). This article was last updated 8 weeks ago, by Jahmila Corero of Jeonju in South Korea.