Invasive Species

Giant Hogweed and Cow Parsnip: Which is Which and Why You Should Care

This summer we fielded calls from several frantic landowners who were certain they had giant hogweed growing on their property. Heracleum mantegazzianum is a weed worthy of panic, as its sap causes severe phytophotodermatitis in humans.

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Aquatic Invasive Species Update

Invasive species come in all shapes and sizes and can be transported in countless ways disrupting the native ecosystems and in many cases overrunning the ability for native species to thrive.

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Spring Is Here! When Can You Start Treating Weeds?

Summer is here and with the arrival of warm temps and sunshine come the season of noxious weed growth. Noxious weeds are invasive plants that has been introduced into an environment and causes or is likely to cause environmental or economic harm.

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Invasive mussels wander closer to Wyoming's borders

Quagga mussel veligers (microscopic juvenile quagga mussels) are on the move and have been detected in Deer Creek Reservoir in north-central Utah. Soon after, a single zebra mussel was found in South Dakota at a boat dock in Lewis & Clark Lake and a quagga mussel was found in Angostura Reservoir in southwestern South Dakota.

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Feed Weed Free

So what is the big deal about certified weed free forage? Prevention is the most economical and proactive method of controlling invasive species by never letting them into this area in the first place.

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TCWP Volunteer Opportunity: EDDMapS West

Learning how to use EDDMapS West can be a rewarding volunteer opportunity for Teton County’s outdoor enthusiasts to help the Weed & Pest District locate high priority invasive plants.

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Emergency Declaration of New Invader to Teton County

The Teton County Weed and Pest District board voted for an emergency declaration of Austrian fieldcress during their board meeting on Tuesday, June 30. The emergency declaration will allow treatment of the invader during this growing season.

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