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State agriculture officials describe expanded quagga mussel surveillance and large-scale 2024 treatment on the Mid‑Snake River
Summary
Idaho Department of Agriculture officials reported expanded monitoring and a large chemical treatment on the Mid‑Snake after detecting small numbers of quagga mussel veligers. The department said it doubled sampling statewide, increased inspections about 50%, and carried out a 200‑hour chelated‑copper treatment in October 2024.
Department of Agriculture officials told the Senate Agriculture Committee the state has expanded invasive‑species surveillance and undertook an extensive 2024 response after limited detections of quagga mussel veligers on the Mid‑Snake River.
Chanel Tewall, director of the Idaho State Department of Agriculture (ISDA), told the committee that the 2008 Invasive Species Act directs the agency to maintain boat check stations and a response program. ISDA Director Tewall and bureau chief Nick (last name provided in transcript) described program changes since the committee last reviewed the issue: ISDA doubled statewide sampling, increased watercraft inspections by about 50%, added more sampling stations and lab partners, and expanded public communication to target out‑of‑state visitors.
ISDA said it found only very small numbers of…
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