How a tiny mite could slow the spread of whitetop throughout the state

What some people may think is a beautiful white flower is actually an aggressively invasive weed. Hoary cress, also known as whitetop, is a noxious weed that causes many problems throughout Wyoming. To mitigate the spread of this noxious weed, the Wyoming Weed and Pest Council (WWPC) has begun biological control with a tiny mite.

Whitetop is a highly invasive and state-designated noxious weed. Originally native to the Mediterranean and areas of Asia, whitetop stops the growth of nearby plant species, which reduces native biodiversity, crop yields and more. It also is indigestible and toxic to...


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