USDA Set to Unleash Japanese Bugs on Invasive Knotweed
Published Date: 6/22/2026
Notice
Summary
The USDA is giving the green light to release a tiny bug called Aphalara itadori from Japan to help fight invasive knotweed plants spreading across the U.S. This natural pest control method won’t harm the environment and offers a smart, cost-effective way to protect our lands. Gardeners, farmers, and nature lovers can expect this eco-friendly solution to start making a difference soon!
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
Permits approved to release knotweed psyllid
On June 16, 2026 APHIS authorized permits to release the insect Aphalara itadori sourced from Murakami, Japan into the contiguous United States to help control Japanese, giant, and Bohemian knotweeds. APHIS issued a final supplemental environmental assessment and a Finding of No Significant Impact and determined an environmental impact statement is not required.
Murakami line chosen for better hybrid control
APHIS considered and authorized release of the Murakami-sourced Aphalara itadori after finding it is native to a climate and photoperiod better matched to primary U.S. knotweed regions, is recently collected (field-adapted), and 'performs particularly well on hybrid knotweed (F. x bohemica),' which the notice says is the most abundant knotweed type in the United States. APHIS received the permit request in June 2021 and published a supplemental EA for public comment on February 10, 2023.
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