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Effects of long-term feeding by spotted lanternfly (Hemiptera: Fulgoridae) on ecophysiology of common hardwood host trees. | LitMetric

AI Article Synopsis

  • The spotted lanternfly (Lycorma delicatula) poses a potential economic threat to U.S. forest ecosystems and production nurseries due to its feeding habits on common hardwood trees.
  • Long-term feeding by L. delicatula over four seasons significantly reduced the growth and nutrient storage in young trees like silver maples and weeping willows.
  • Despite observed declines in health and nutrient levels in tree leaves, the study anticipates that natural variations in lanternfly populations in the wild would likely result in less severe impacts on forest and ornamental trees compared to the controlled conditions of the study.

Article Abstract

While the invasive spotted lanternfly, Lycorma delicatula (White) [Hemiptera: Fulgoridae], continues to expand its range in the United States, there remains a knowledge gap regarding the economic threat that this pest presents to forest ecosystems and production nurseries. L. delicatula uses several common hardwood trees as hosts and a previous study found that short-term feeding can reduce growth of young maple saplings. Herein, long-term feeding over 4 consecutive seasons significantly reduced diameter growth and below-ground starch storage in roots of young silver maples (Acer saccharinum L.), weeping willows (Salix babylonica L.), river birches (Betula nigra L.), and trees of heaven (Ailanthus altissima [Mill.] Swingle) in response to L. delicatula feeding pressure in a density-dependent manner. In Year 3 when feeding pressure was the lowest, silver maple and willow recovered with greater diameter growth than in Year 2. Nutrients essential for photosynthesis and growth (iron, sulfur, and phosphorus) were reduced in leaves of all tree species compared to controls in the second year. This 4-yr study represents a worst-case scenario in which L. delicatula fed on the same trees for 4 consecutive growing seasons. In the wild, population numbers can vary greatly from year to year on individual trees and they move frequently among hosts (until autumn when they settle on A. altissima or other late-season hosts that have not yet senesced). Thus, we would not expect negative impacts of unconfined L. delicatula in natural settings on forest or ornamental trees to be as marked as reported here.

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Source
http://dx.doi.org/10.1093/ee/nvad084DOI Listing

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