What is eating my red-twig dogwood?
Dogwood Sawfly Damage Dogwood sawflies feed on the leaves of several shrubby dogwood species including gray dogwood (Cornus racemosa), blood-twig dogwood (Cornus sanguinea) and red osier dogwood (Cornus sericea). The larvae have chewing mouthparts that create sizable holes in leaves.
What is wrong with my red-twig dogwood?
Red-twig dogwood (C. sericea) is very susceptible to powdery mildew. If the disease is severe enough to warrant the use of fungicides, be sure that the dogwood is a valuable specimen and the spray equipment can provide good coverage. For fungicides to be effective, they must be applied as soon as symptoms are noticed.
What animals eat red-twig dogwood?
Use by Wildlife: Red-twig Dogwood is an important browse for deer, elk, moose, Mountain Goats, and rabbits. Although not as desirable as other fruits, the berries often persist through winter, providing food when other fruits are gone. Mice, voles and other rodents eat the bark and the berries.
What kind of bugs do dogwood trees attract?
Other common pests of dogwood include leaf spot fungi, Armillaria root rot, dogwood twig borer, ambrosia beetle, aphids, whitefly, scale insects, and leaf-feeding caterpillars.
How do you treat a diseased dogwood tree?
Remove the infected tree and do not replace it with another woody ornamental until the soil has been fumigated and aerated. Apply a fungicide to protect plants. White fungal growth develops on the surface of leaves late in the summer and during the autumn. Apply a fungicide as soon as symptoms are seen.
What caterpillar eats red twig dogwood?
dogwood sawfly larvae
All the “caterpillars” defoliating your dogwoods are dogwood sawfly larvae, not true caterpillars but the immature stage of a wasp. They go through several molts, and at the final one they lose the original white covering and are greenish yellow with black spots. Handpicking is the safest way to go.
Do deer and rabbits eat dogwood?
Authorities claim some dogwood species such as Cornus sericea are “seldom damaged” by deer, but others are frequently targeted. Lists of deer and rabbit resistant plants are useful, but they are not fool proof. If rabbits are feeding on the lower branches, don’t be surprised if deer begin to prune the tops.
How do you get rid of dogwood borers?
Pyrethrin is labeled for use by the homeowner against dogwood borer. Since dogwood borer adults may be present from late April through July, several applications may be needed for good control. Begin treatment in early May and repeat four times at three-week intervals.
How do you get rid of a dogwood sawfly?
When the sawfly is detected early, insecticidal soap or horticultural oil is an effective control. In large plantings, chemical controls may be required. When the sawflies are larger, one of the contact or systemic insecticides registered for control may be needed.
What is killing dogwood trees?
Dogwood anthracnose was first reported as a disease of flowering dogwood in the United States in 1978. In 15 years, it has caused serious losses to flowering dogwood found in the forest and in ornamental plantings over large portions of the Eastern and Southern United States.
Are red twig dogwood shrubs deer resistant?
Additionally, the Red Twig Dogwood is deer resistant. This in itself makes for a great contender to our “plants we love” list, due to the fact that we know so many gardeners and landscapes that are frequented by many deer.
How do I protect my dogwood from deer?
Barriers include: tree shelters, wire mesh, Vexar®, drain tile, spiral wraps, paper tree wraps, snow fence, or other material. Deer may still browse plants that grow out the top of shorter barriers, but if the barrier is 5-6 feet tall the plant can often grow past the reach of deer.
What does a dogwood borer look like?
Adult: Dogwood borer, a clearwinged moth, has a wasp-like body, approximately 1 to 2 cm (1/2 inch) long. Adults are bluish-black with a yellow band on the second and fourth abdominal segments.
What insecticide kills dogwood borers?
Dimethoate spray prevented borer entrance in wounds. Used as a soil treatment it killed all dogwood and most viburnum borers.
What are the common problems with red twig dogwood plants?
Some of the more common issues that people experience with their red twig dogwood plants are diseases and pest infestations. A common disease is powdery mildew. This is a fungus that is characterized by its appearance of a powdery looking mildew that is fine in texture and white in color.
Are there any bugs that eat dogwood trees?
Unfortunately, a few insects can cause problems for this attractive garden addition as well as other dogwood varieties. Some can be lethal, but most are more unsightly than severely problematic. The dogwood borer is a small, clear-winged moth that resembles a wasp and is the most problematic of the dogwood pests.
What is a red twig dogwood tree?
The red twig, or red osier, dogwood (Cornus stolonifera) is an ornamental plant grown in U.S. Department of Agriculture plant hardiness zones 3 through 8. This deciduous shrub produces bright red foliage in the fall, and features red twigs and branches in the winter. White flowers adorn the plant throughout the summer and into the fall.
How do you treat red twig dogwood disease?
Fungicides work on the majority of red twig dogwood diseases. They go on to warn against pest infestations as well, including the dogwood borer, scales and dogwood club gall midges. Infected branches should be removed and burned to kill larvae before they hatch and spread to other dogwoods in the vicinity.