Saperda imitans

Felt & Joutel, 1904

Oblique-banded Longhorn Beetle

Saperda imitans is a in the , described by Felt and Joutel in 1904. It is a on black cherry (Prunus serotina), particularly infesting wind-damaged trees in Allegheny hardwood stands. The overwinters in sapwood and outer heartwood, causing damage that impacts commercial timber value. It is not attracted to ethanol and shows specific preferences for condition, targeting dying trees with moist phloem rather than completely dead or healthy specimens.

Saperda imitans by (c) Nick Block, some rights reserved (CC BY), uploaded by Nick Block. Used under a CC-BY license.Saperda imitans (51905802076) by Ben Sale from Stevenage, UK. Used under a CC BY 2.0 license.Saperda imitans by Whitney Mattila. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Saperda imitans: //sæˈpɜːrdə ˈɪmɪˌtænz//

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Habitat

Allegheny hardwood stands; specifically wind-thrown black cherry stands in northwestern Pennsylvania. Prefers dying black cherry trees with moist phloem and epicormic branches with less than 25% live foliage. Does not infest completely uprooted dead trees or live trees with intact root systems.

Distribution

Canada (New Brunswick, Ontario, Québec) and the United States. Documented from the Kane Experimental Forest in northwestern Pennsylvania.

Seasonality

Peak occurs late May to early June (based on 2007 observation in Pennsylvania).

Host Associations

  • Prunus serotina - primary wind-damaged black cherry; on dying trees with moist phloem

Life Cycle

(one per year). Overwinters as in sapwood and outer heartwood of trees.

Behavior

Not attracted to ethanol . Shows strong preference for specific tree conditions: targets dying trees with moist phloem and epicormic branches with less than 25% live foliage, avoiding both completely uprooted dead trees and live trees with intact root systems. Gallery construction is more dense in the upper half of the first 5 meters of tree boles compared to the lower half. Low rates in branches less than 10 cm diameter.

Ecological Role

Impacts commercial timber value of wind-damaged black cherry through sapwood and outer heartwood damage. Acts as a exploiting stressed or damaged trees in forest .

Human Relevance

Economic pest of black cherry timber, reducing commercial value of wind-damaged trees through internal wood damage.

Similar Taxa

  • Saperda lateraliscongeneric with similar associations on hardwood trees; distinguished by specific host preferences and geographic distribution
  • Saperda candidacongeneric known as roundheaded apple tree borer, attacks trees in Rosaceae rather than Prunus serotina

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Sources and further reading