Elm
Ulmus
Elms are deciduous and semi-deciduous trees comprising the genus Ulmus in the family Ulmaceae. They are distributed over most of the Northern Hemisphere, inhabiting the temperate and tropical-montane regions of North America and Eurasia, presently ranging southward in the Middle East to Lebanon and Israel, and across the Equator in the Far East into Indonesia.
Elms are components of many kinds of natural forests. Moreover, during the 19th and early 20th centuries, many species and cultivars were also planted as ornamental street, garden, and park trees in Europe, North America, and parts of the Southern Hemisphere, notably Australasia. Some individual elms reached great size and age. However, in recent decades, most mature elms of European or North American origin have died from Dutch elm disease, caused by a microfungus dispersed by bark beetles. In response, disease-resistant cultivars have been developed, capable of restoring the elm to forestry and landscaping.
Spotted Lantern Fly
Lycorma delicatula, commonly known as the Spotted Lanternfly (SLF), is a new invasive insect that has spread throughout southeastern Pennsylvania since its discovery in Berks County in 2014. SLF presents a significant threat to Pennsylvania agriculture, including the grape, tree-fruit, hardwood and nursery industries, which collectively are worth nearly $18 billion to the state’s economy.
Japanese Beetle
Japanese beetle adults have metallic green bodies with coppery brown wing covers surrounded with 12 white tufts of hair.
Affected Species:
Lecanium Scale
The European fruit lecanium is a key soft scale insect pest of shade trees and other woody ornamental plants in…
Affected Species:
Aphids
Many species of aphids or plant lice occur on ornamental trees and shrubs in Pennsylvania.
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Diseases Affecting Elm
Botryodiplodia Canker
Pathogen—Botryodiplodia canker is caused by fungal species in the genus Botryodiplodia, including B. hypodermia and B. theobromae. Botryodiplodia is the asexual form of the fungus. The sexual states for some of the Botryodiplodia species are Botryosphaeria spp.
Affected Species:
Black Leaf Spot
Leaf spot is a common descriptive term applied to a number of diseases affecting the foliage of ornamentals and shade trees. The majority of leaf spots are caused by fungi, but some are caused by bacteria. Some insects also cause damage that appears like a leaf spot disease. Leaf spots on trees are very common…
Affected Species:
Insects Affecting Elm
Please give us a call if you have any questions about your trees and shrubs or would like to schedule an appointment for us to walk your property.
610.525.1562
