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Invasive Species Resources

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University of California - Riverside. Center for Invasive Species Research.

University of California. Statewide Integrated Pest Management Program.
University of California. Agriculture and Natural Resources.
University of Missouri Extension.
Emerald ash borer (Agrilus planipennis) is an exotic, invasive, wood-boring insect that infests and kills native North American ash trees, both in forests and landscape plantings. With EAB now in several areas of the Show-Me State - and its ability to hitchhike on firewood - the probability of it spreading to noninfected areas in the state is high.

University of Missouri. Extension.

Although not yet detected here, thousand cankers disease (TCD) is a potentially fatal disease of black walnut, caused by the walnut twig beetle (Pityophthorus juglandis) and an associated fungus (Geosmithia morbida). TCD could easily spread to Missouri from the several eastern and western states where TCD is already present. You can help minimize the chances of spreading TCD by following these steps:
University of Maryland.
Beekeepers across the United States lost 40.7% of their honey bee colonies from April 2018 to April 2019, according to preliminary results of the latest annual nationwide survey conducted by the University of Maryland-led nonprofit Bee Informed Partnership. Honey bees pollinate $15 billion worth of food crops in the United States each year. The Bee Informed Partnership team said multiple factors are likely responsible for persistently high annual loss rates and this year’s jump in winter losses. They say a multi-pronged approach--research, extension services & education, and best management practices--is needed to combat the problem. The number one concern among beekeepers and a leading contributor to winter colony losses is varroa mites, lethal parasites that can readily spread from colony to colony. These mites have been decimating colonies for years, with institutions like the University of Maryland actively researching ways to combat them.
University of California. Statewide Integrated Pest Management Program.
The UC IPM Weed Photo Gallery includes many, but not all, weed species commonly found in California farms and landscapes.
University of California. Statewide Integrated Pest Management Program.
University of California. Statewide Integrated Pest Management Program.
University of California. Statewide Integrated Pest Management Program.

University of California. Statewide Integrated Pest Management Program.

University of California - Los Angeles. UCLA Newsroom.

University of Maryland Extension.

See also: Pest Threats for more fact sheets

University of Maryland Extension.
See also: Pest Threats for more fact sheets
University of California. Cooperative Extension.

University of California. Weed Research and Information Center.

See also: Weeds in Natural Areas for more information sheets

University of California. Statewide Integrated Pest Management Program.
University of California. Cooperative Extension and Agricultural Experiment Station.
University of Missouri. Division of Plant Sciences.