USDA. APHIS. Wildlife Services.

Iowa State University. Extension and Outreach.

Owners of ash trees are faced with some potentially big decisions about how to protect their trees against the destruction of emerald ash borer. Although there is no perfect solution, insecticides are available to protect high-value trees. To help Iowans better understand their options, a group of specialists with Iowa State University Extension and Outreach recently published a guide called "Emerald Ash Borer Management Options." In this four-page resource, the specialists explain how to determine the value of ash trees, the cost of treatment and how to compare the different treatment options available.

Washington State University. Tree Fruit Research and Extension.

Oregon Department of Agriculture.

See also: Pest Alerts for more pests

Oregon State University.

Oregon Invasive Species Council.

Portland State University (Oregon).

Oregon Department of Agriculture.

A dead spotted lanternfly (SLF), Lycorma delicatula, has been found in a shipment of planters and ceramic pots sent to Oregon from Pennsylvania. Recently, a nursery in the Corvallis area found the dead female specimen and called the Oregon Department of Agriculture (ODA) Insect Pest Prevention and Management Program (1-800-525-0137) to report. The SLF poses a threat to tree fruit and grape production. Grapes used for wine are a high value crop in Oregon, valued at more than $238 million in 2019. This invasive pest also prefers a broad range of more than 70 plant species including apples, cherry, chestnut, hops, maple, peaches, pear, pine, plum, poplar, oak, rose and walnut.

SLF was first found in North America in 2014, in Pennsylvania. It is believed to have arrived on shipments of stone from China. Since then, SLF has been detected in 11 eastern states (Connecticut, Delaware, Massachusetts, Maryland, North Carolina, New Jersey, New York, Pennsylvania, Virginia and West Virginia). If you believe you have found SLF, please notify the Oregon Department of Agriculture immediately by calling 1-800-525-0137 or email plant-entomologist@oda.state.or.us.

Oregon Department of Agriculture.

See also: Pest Alerts for more pests

National Center for Appropriate Technology. National Sustainable Agriculture Information Service.

Wisconsin Department of Natural Resources.

California Department of Food and Agriculture.

California Department of Food and Agriculture.

A portion of Los Angeles County has been placed under quarantine for the Oriental Fruit Fly following the detection of 14 flies in the San Fernando Valley in the North Hills area. To prevent the spread of fruit flies through homegrown fruits and vegetables, residents living in the quarantine area are urged not to move those items from their property. However, they may be consumed or processed (i.e., juiced, frozen, cooked, or ground in the garbage disposal) on the property where they were picked or disposed of by double bagging and placing in the regular trash, not green waste. Residents with questions about the project may call CDFA’s Pest Hotline at 1-800-491-1899. Additional information may be found here: www.cdfa.ca.gov/plant/off.

Oregon State University. Extension Service.

Oregon State University.

After 12 years of research, a parasitic wasp that controls a highly destructive fruit fly will be released by Oregon State University agricultural scientists in June. Vaughn Walton, Extension entomologist and professor in the College of Agricultural Sciences, said the U.S. Department of Agriculture has permitted release of the wasp (Ganaspis brasiliensis), a slow process that took more than 10 years from application to decision. Now that it has a permit, Walton’s lab, which is part of the OSU Agricultural Experiment Station, is raising enough wasps to make a dent in the spotted wing drosophila (SWD) population in Oregon.

Ohio State University.

New Jersey Department of Environmental Protection. Division of Fish and Wildlife.

Environment Canterbury Regional Council (New Zealand).

Great Lakes Commission.

California Academy of Sciences.