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European chafer (2012) Rhizotrogus majalis This new pest is destructive to lawns in the larval stage and feeds on leaves and flowers in the adult stage. This beetle was first found in British Columbia in 2001. It naturally disperses at a rate of about 10 ...
Red lily leaf beetle (2012) Lilioceris lilii The red lily leaf beetle (RLLB) is a European and Mediterranean beetle that feeds primarily on plants in the lily family. Known hosts are true lilies (excluding daylilies) and particularly the Asiatic lilies an ...
Mountain ash sawfly (2009) Pristiphora geniculata Mountain ash sawfly is a recent addition to pests of American and European mountain ash, (Sorbus americana and S. aucuparia respectively), which are commonly planted ornamental landscape trees and naturali ...
Elm seed bug (2009) Arocatus melanocephalus The elm seed bug has limited distribution in Oregon, Washington and Idaho. It is has also been found in Utah. The elm seed bug is native to south central Europe. While we do not know how it arrived, there have b ...
Seed bugs (2001- 2005) Mediterranean seed bug (Xanthochilus saturnius) Rhyparochromus vulgaris Tuxedo bug (Raglius alboacuminatus) There are several native seed bugs in the Pacific Northwest (PNW). Examples include the boxelder bug (Heteroptera: Rhopolida ...
Viburnum leaf beetle (2001) Pyrrhalta viburni The first record of the viburnum leaf beetle (VLB) in North America was from Ontario in 1947, although it may have arrived in the early 1900s on nursery stock from Europe. In the U.S., this beetle was found in ...
Emerging Pests- New in 2019 and later Michael R. Bush, Christopher Adams, and Sven Spichiger Latest revision:  March 2021 ...
Spotted lanternfly (2020) Lycorma delicatula The spotted lanternfly is an invasive planthopper first documented in Pennsylvania in 2014 and has since spread to adjacent states and along the Atlantic seaboard states. This insect feeds on important crops su ...
Spotted Lanternfly immatures
Asian giant hornet (2019) Vespa mandarinia Several invasive hornets, including the Asian giant hornet (AGH), have been intercepted in ports throughout the Pacific Northwest. In 2019, AGH was confirmed in and eradicated from British Columbia, Canada. In De ...
Mint Pests Navneet Kaur and Leanna Van Slambrook Latest revision:  March 2022 In all cases, follow the instructions on the pesticide label. The PNW Insect Management Handbook has no legal status, whereas the pesticide label is a legal document. Read the p ...