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NA-PR-07-05

Laurel wilt is a disease of woody plants in the laurel family (Lauraceae). Hundreds of millions of redbay (Persea borbonia) trees have been killed by laurel wilt in the southeastern Atlantic Coastal Plain region of the United States (US). The disease has also killed large numbers of sassafras (Sassafras albidum) trees in forests and landscapes, and avocado (Persea americana) trees in commercial production. As of October 2019, laurel wilt was known to occur from Texas to North Carolina, south through Florida and north to Kentucky. Laurel wilt is expected to continue spreading through sassafras in the eastern US, and is a potential threat to California bay laurel (Umbellularia californica) in the western US and to lauraceous species elsewhere in the world.
See also: Region 8 - Forest & Grassland Health for more information.

Pest Alerts are a signature program of the North Central IPM Center to help support initiatives to track, report and manage invasive pests.

PNW 758 - A Pacific Northwest Extension Publication

Plant Invaders of Mid-Atlantic Natural Areas, Field Guide is a portable resource for both novice and expert. This practical book is intended for people interested in maintaining or restoring natural areas - from parks and preserves to residential landscapes. Use this book as an introduction to invasive plants to help you recognize, report, prevent, control and teach others about them. Managing invasive plants is crucial if we want our native plants and animals to thrive. Plant Invaders provides information on 92 aquatic and terrestrial invasive species threatening our region, guidance on control methods, discussion of the effects of climate change on invasive plants, explanations and maps of ecoregions and physiographic provinces, and suggestions for native plant alternatives.

Citation: Swearingen, J.M. and J.P. Fulton. 2022. Plant Invaders of Mid-Atlantic Natural Areas, Field Guide. Passiflora Press. 200 pp.

This resolution addresses invasive species management and adds substantial new policy, including: a call to address the destructive relationship between invasive grasses and wildfires; mechanisms to enhance regional invasive species research, planning, and coordination; and recommendations to Congress and federal agencies on improving invasive species management on federal lands and supporting state-led management efforts.

WGA resolutions are in effect for three years and then expire or are renewed. See all current WGA Policy Resolutions.

This policy resolution addresses the management of forest and rangelands in coordination with federal agencies and addresses issues including wildland fire, invasive spaces, and collaborative efforts.

WGA resolutions are in effect for three years and then expire or are renewed. See all current WGA Policy Resolutions.

Since 2002, forests in the southeastern U.S. have struggled against a disease called laurel wilt. In 18 years, laurel wilt has spread to 11 southeastern states and killed hundreds of millions of trees. A review article by USDA Forest Service scientist Rabiu Olatinwo reflects on the origins and spread of laurel wilt throughout the last several years. Olatinwo, a research plant pathologist at the SRS, published this research with recently retired plant pathologist Stephen Fraedrich and research entomologist Bud Mayfield in the journal Forests.

Contains invited papers, short contributions, abstracts, and working group summaries from the Beech Bark Disease Symposium in Saranac Lake, NY, June 16-18, 2004.

Climate change is likely to bring dozens of new invasive plants to the Northeast. Despite their invasive tendencies, many of these species are sold as ornamental plants in slightly warmer climates, but are not yet a large part of nursery sales in the Northeast. By avoiding these species, we protect our native ecosystems from future invasive species impacts. We also present alternative native plants that provide similar aesthetics while also supporting biodiversity.
See also: Environmental Conversation Education Materials for additional educational materials (2011 to present)

Provides planting recommendations for present and future conditions using native species adapted to both current and future hardiness zones. An estimated 80% of ornamental plants for sale are non-native. This means that the average yard does a poor job of supporting native flora and fauna. By shifting our plantings towards natives, we can dramatically increase the diversity of bees, butterflies, birds and other animals. In contrast, non-native plants do not support local food webs and can become invasive. Native plants increase biodiversity and reduce risks associated with invasive species, which supports resilient ecosystems in the face of climate change.
See also: Environmental Conversation Education Materials for additional educational materials (2011 to present)

Biocontrol is an important management tool that utilizes one species (a biocontrol agent) to control another (a target host) and can be an effective approach for controlling populations of invasive species across broad spatial scales. There are growing concerns that mismatches between how biocontrol agents and their hosts respond to climate change could alter the efficacy of current and future biocontrol programs.
See also: Environmental Conversation Education Materials for additional educational materials (2011 to present)

Native plants dramatically increase the diversity of bees, butterflies, birds and other native animals. Native plants increase biodiversity and reduce risks associated with invasive species, which supports resilient ecosystems in the face of climate change.
See also: Environmental Conversation Education Materials for additional educational materials (2011 to present)

See also: Pest Alerts for more resources

The widely cited “tens rule” in invasion ecology suggests that approximately 10% of established, non-native species will become invasive–or display negative impacts—when introduced to new environments. This study demonstrates that the tens rule is a poor estimate of invasion rates on a global scale. Instead, a ‘twenties rule’ is a better rule of thumb, meaning that roughly 20% of all established, non-native species eventually become invasive

Special Note: RiversEdge West formerly known as the Tamarisk Coalition, change effective Mar 1, 2018.