NYSSA DISEASE PROBLEMS
Several fungi cause cankers on Black Gum. As the cankers Leaf spot caused by Mycosphaerella nyssaecola symptoms are enlarge the infected stems die back. Trunk cankers cause tree die back. There is no chemical control. Prune out infected branches ... [... more]
Michigan State University Extension |
RHAMNUS INSECT PROBLEMS
Scale infestations are controlled with dormant oil in Aphids suck plant juices and coat the leaves with sticky honeydew. The insects can be dislodged with high pressure water sprays from the garden hose. the spring before plant growth begins. The ... [... more]
Michigan State University Extension |
Rhamnus frangula--Glossy Buckthorn
References for Cultivars: Bailey Nurseries 1999, Lake County Height: 12 ft Spread: 10 ft Form: oval Comments: Glossy Buckthorn grows in sun or partial shade Nursery 1999, Weston Nurseries 1999, J. Frank Schmidt and Son 1999, Spring Meadow Nursery ... [... more]
Michigan State University Extension |
Halesia tetraptera (carolina)--Carolina Silverbell
Height: 30 ft Spread: 20 ft Form: rounded Comments: Carolina Silverbell is a small tree that grows The flowers, produced with or before the leaves, are Gardens 1999, Gee Farms 1999. best in sun or semi-shade and a rich, acid, well-drained soil. ... [... more]
Michigan State University Extension |
CARPINUS DISEASE PROBLEMS
Several fungi cause leaf spots on Carpinus. Leaf spots Canker caused by several fungi causes infected branches to are not serious so control measures are usually not dieback and entire trees die if the trunk is infected and girdled. Severely ... [... more]
Michigan State University Extension |
CARPINUS INSECT PROBLEMS
Relatively few insects attack Carpinus. Maple phenacoccus forms white cottony masses on the undersides of the leaves. Cottony Maple Scale [... more]
Michigan State University Extension |
CARYA DISEASE PROBLEMS
Hickory anthracnose or leaf spot is caused by the fungus Gnomonia caryae. In wet years the disease causes A large number of fungi cause leaf spots on hickory. Severe infections can cause defoliation. Many of the Witches broom can follow a leaf ... [... more]
Michigan State University Extension |
CARYA INSECT PROBLEMS
Aphids of various types feed on hickory causing distorted Hickory bark beetles mine the bark and sapwood. The No chemical control is registered for this pest. The twig girdler larva girdles twigs causing weakened No chemical control is registered ... [... more]
Michigan State University Extension |
CATALPA DISEASE PROBLEMS
Anthracnose caused by Gloeosporium catalpae will cause Leaf spots caused by several fungi can attack catalpa. A Powdery mildew causes a white powdery coating on the Catalpa is susceptible to verticillium wilt. Branches die During hot, dry seasons ... [... more]
Michigan State University Extension |
CATALPA INSECT PROBLEMS
The larva of the catalpa sphinx moth can eat large quantities of leaves. The caterpillar is yellow with black markings. Waiting until the insects are full grown before spraying will not be beneficial. [... more]
Michigan State University Extension |
Chionanthus retusus--Chinese Fringe Tree
Comments: Chinese Fringe Tree grows best in a sunny location. The white flowers (Vis. 1) appear in late spring or early summer. Chinese Fringe Tree blooms (Vis. 3) later than C. virginicus but may not be as hardy. The blue fruit is produced on ... [... more]
Michigan State University Extension |
Aronia arbutifolia--Red Chokeberry
Height: 7 ft Spread: 4 ft Form: upright Comments: Red Chokeberry is grown for its excellent red Nurseries 1999, J. Frank Schmidt and Son 1999, Spring Meadow Nursery 1999, Ray Wiegand's Nursery 1999, White Flower Farm 1999, Sheridan Nurseries ... [... more]
Michigan State University Extension |
