Apple And Crabapple Diseases
Fire blight is a devastating disease caused by the bacterium Erwinia amylovora and is very difficult to control. The disease develops rapidly in early spring during rainy weather when temperatures are above 60 °F and ... [... more]
Clemson University Extension |
Apple And Crabapple Insects
Plum Curculio: The plum curculio (Conotrachelus nenuphar) is a native weevil that may attack apple fruit. The adult weevils spend the winter in protected areas near the apple trees. They return to the trees in the ... [... more]
Clemson University Extension |
Crape Myrtle Problems
Control: Multiple approaches are necessary for controlling Japanese beetles. Adults can be removed by handpicking and destroyed. Japanese beetle traps are available commercially or can be homemade. They may be ... [... more]
Clemson University Extension |
Dogwood Problems
Dogwood Borer: The dogwood borer is the larva (immature form) of a clearwing moth that resembles a wasp. The borer is off-white in color with a reddish-brown head. It is about 5/8-inch long at maturity. The female ... [... more]
Clemson University Extension |
Pine Bark Beetles
Five major species of pine bark beetles are found in South Carolina. They are the Small Southern Pine Engraver (Ips avulsus), the Southern Pine Engraver (Ips grandicollis), the Coarse Writing Engraver (Ips ... [... more]
Clemson University Extension |
Azalea & Rhododendron Diseases
Dieback is an important disease of hybrid rhododendrons in the landscape and is caused by the fungus Botryosphaeria dothidea. Azaleas with similar symptoms are more likely to be infected by the fungus Phomopsis species. Typically, dying branches ... [... more]
Clemson University Extension |
Boxwood Problems
Decline (Twig Blight, Dieback): Boxwood decline is a poorly understood complex involving the fungi Volutella, Paecilomyces, Macrophoma and Phytophthora, as well as cold injury and nematodes (microscopic round worms). ... [... more]
Clemson University Extension |
Camellia Problems
Prevention and Treatment: Bud drop can be caused by several different factors. One of the most common causes is large fluctuations in temperature or moisture. Camellias perform best planted in areas with uniform ... [... more]
Clemson University Extension |
Euonymus Problems
Prevention and Control: The following Euonymus species are resistant to euonymus scale: E. alatus ‘Compactus’ and E. fortunei ‘Acutus.’ Consider using these in new plantings. Euonymus scale is difficult to control. ... [... more]
Clemson University Extension |
Juniper Problems
Juniper Scale: Symptoms of juniper scale (Carulaspis juniperi) infestation are very similar to symptoms of spruce spider mite infestation. Initially, the juniper appears off-color and infested branches show little ... [... more]
Clemson University Extension |
Gray Mold (Botrytis Blight)
Annual and perennial bedding plants, flowering and foliage plants, and seedlings in beds, flats or pots may be sprayed with fungicides containing thiophanate-methyl, copper sulfate pentahydrate or neem oil (clarified ... [... more]
Clemson University Extension |
Pansy Problems
Control: The first step in discouraging slugs and snails is to remove mulch and leaf litter near plants to reduce the moist conditions necessary for their survival. Slugs and snails can be removed by handpicking. The ... [... more]
Clemson University Extension |
