Thousand Cankers Disease Reappears in Maryland

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Contributor: Dr. Ramesh R. Pokharel, Plant Disease Specialist, Maryland Department of Agriculture, Ramesh.pokharel@maryland.gov ANNAPOLIS, MD (August, 2019) – Thousand cankers disease (TCD) is a complex problem in walnuts, Juglans spp., caused by the fungus Geosmithia morbida and transmitted by walnut twig beetle (WTB), Pityophthorus juglandis. The beetles tunnel under tree bark and introduce the fungus, […]

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Teaming up to Tackle Two-horned Trapa: A Highly Invasive New Species of Water Chestnut

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ANNAPOLIS, MD (July 1, 2019) – Eurasian water chestnut (Trapa natans) has been present in the United States since the 1880s and is a well-known invasive species.  In 2014, a new introduction of a relative of T. natans was discovered in northern Virginia. It was recognized as new by fruits that have 2 horns in […]

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Pray for the prey of the praying mantis

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Contributor: Bud Reaves, Anne Arundel Forestry Board Mantises are one of the most ferocious predators in the animal kingdom. Able to capture and kill prey much larger than themselves, they have adapted into efficient, ruthless hunters and are valuable in the control of insect pests. However, Maryland has three species of exotic mantises, which may […]

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Toil and Trouble: Weed Risk Assessment

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Contributors: Kerrie Kyde and Sylvan KaufmanFor more information, contact: MD Department of Agriculture- Plant Protection and Weed Management, ppwm.mda@maryland.gov Over the course of two days in early March, 30 volunteers toiled, argued, and persevered through the process of assessing three different plant species for invasiveness. They dug up peer-reviewed papers, unearthed state government reports, scrolled […]

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Tiny beetle, giant impact.

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Contributor: Aaron Shurtleff, Maryland Department of Agriculture, Aaron.Shurtleff@maryland.gov The khapra beetle (Trogoderma granarium) is a small beetle in the family Dermestidae.  It feeds on a wide variety of dried plant and animal products, but its main target is stored grains, such as rice, wheat, and barley.  Khapra beetle is one of the most destructive pests […]

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Invasive Vinca, Rhymes with “Stinka”

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Contributor: Jil Swearingen, Invasive Species Consultant, jilswearingen@gmail.com While there are a number of native evergreen groundcovers in Maryland, you’re likely to see large patches of non-native evergreen plants covering the ground this time of year in our parks and natural areas. Most common among these are English ivy (Hedera helix), winter creeper (Euonymus fortunei), ground ivy […]

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‘Tis the Season to Fear Holly

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Contributor: Michael Ellis, M-MCPPC Park Ranger Office, Michael.Ellis@pgparks.com With winter weather and the holiday season here, Maryland’s deciduous forests have lost their leaves, leaving evergreens strikingly bright and colorful in otherwise dormant landscapes. However, some evergreen plants now found in Maryland may be non-native invasive species. Since hollies are a celebrated symbol of December and the […]

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Safeguarding American Agriculture – One State at a Time

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Contributor: Matthew A. Travis, State Plant Health Director MD/DC, USDA APHIS Every day, goods enter our country from all over the world. With these goods come non-native species that could be the next big invader. Few of us see the behind-the-scenes actions taken by agencies such as the US Department of Agriculture (USDA) to stop these […]

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Spotted Lanternfly and Tree of Heaven

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Contributors: Shelley Brunelle | MDOT State Highway Administration, Office of Environmental Design, Consultant for Landscape Operations DivisionKimberly Rice | Maryland Department of Agriculture, Plant Protection & Weed Management Program Manager | DontBug.MD@maryland.gov ANNAPOLIS, MD (September 1, 2018) – Spotted lanternfly, Lycorma delicatula is an invasive plant-hopping insect that feeds on a wide variety of tree […]

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Nitrogen Fixer Fixin’ For Trouble

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Contact: Francis Smith, Maryland Department of Natural Resources- Forest Service | francis.smith@maryland.gov ANNAPOLIS MD (August 1, 2018) – Prolific seed production. Rapid re-sprouting. Highly adaptable. Three traits of a very successful plant, and also what makes autumn olive an ecological nightmare. As summer winds down and fall creeps in, the red berries of this invasive shrub will […]

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