Contributor: Annise Dobson Many of us have grown up thinking that earthworms are a sign of healthy, fertile soil. However, many earthworms found throughout Maryland are not native. Earthworms can be beneficial in their native ecosystems and agricultural settings, but their ability to re-engineer soil can completely restructure ecosystems and the microbial, plant, arthropod and […]
Contributor: Bud Reaves Invasive vines are colorful and decorative plants that are often used for ornamental purposes for their showy flowers and colorful, sometimes uniquely shaped fruit. They have a downside however, as many invade forested habitats where they can severely limit the growth of, or even kill, trees and shrubs. Fall is a great […]
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, […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]