May 2015

Welcome to the Teton County Weed and Pest District newsletter! We plan on updating subscribers monthly on useful information pertaining to Mosquitoes and Invasive Species.


In this edition you will find information regarding:

  • JHWMA Invasive Species Management Workshop
  • Arboviruses in the news
  • Reducing herbicide injury
  • Upcoming Events - Map Invasives JH training and JHWMA I.S. Management Workshop
JHWMA Invasive Species Management Workshop
By Amy Collett, Marketing and Education Program Coordinator

            The Jackson Hole Weed Management Association (JHWMA) is sponsoring a free invasive species management training including lunch on Wednesday, May 27th from 8 a.m.-5 p.m. at the Teton County Fair Grounds, Exhibit Hall. We encourage you to join us for the entire day but will be happy to have you for portions that interest you.

The morning session 8 a.m. -12 p.m. will be geared towards herbicide safety, reading herbicide labels, laws and regulations with speakers from the University of Wyoming and Wyoming Department of Agriculture. Lunch will be served at noon and staff will discuss our new educational campaign Play, Clean, Go and what the JHWMA partners have planned for the 2015 summer season. At 1:00 pm, educational topics will include non-native and invasive species ID, prioritizing treatments, utilizing multiple management strategies, and a field invasives ID tour. The afternoon sessions will be led by University of Wyoming Extension and Teton County Weed & Pest District staff.  CEUs for Wyoming and Idaho will be available for these sessions. Read More


Arboviruses in the news

By Marta Iwaseczko, TCWP Assistant Supervisor - Mosquitoes


For the last year the media has been abuzz about 2 emerging diseases rapidly spreading in the Americas: dengue and chikungunya.

            The first of these two mosquito-borne viral diseases, dengue, is not actually new to the western hemisphere, but has seen significant historical outbreaks since its introduction to the Americas in the 1600s. Concerted mosquito control efforts undertaken in the New World had brought about successful eradication of its main vector,
Aedes aegypti, in 18 countries by 1962. Unfortunately, in the decades to follow, this peridomestic container-breeding mosquito made a comeback and within the last three decades caused a 4.6 fold increase1 in the number of dengue disease cases, mostly centered in South America,but also reaching into southern Florida and the US territories. In 2014 in fact, for the first time in a long time, in the US and its territories, locally acquired dengue cases (including 11 in FL) exceeded the number of travel-acquired cases.2
            Chikungunya, on the other hand, is a novel disease in the New World. Discovered for the first time in St. Martin in December 2013, and with a human case count of over 1.2 million3 since that time, it is a very rapidly spreading disease. It owes its rapid spread to the presence of two highly competent vectors, the aforementioned Aedes aegypti and the recently introduced, Aedes albopictus.  Read more


Reducing herbicide injury

By Travis Ziehl, Assistant Supervisor - Weeds

Treated Musk thistle

        When I daydream sometimes my mind drifts to work... Wouldn't it be nice if weed control

 was easy? I mean a product that would take care of only the weeds you want to get rid of, while leaving intact your desirable species. Un
fortunately, this dreamy weed killing product remains undeveloped - so until that time; there are 

a few things we can do to reduce unintended herbicide injury.

        Choosing the appropriate herbicide is the first and most important step in reducing injury. Herbicides can be classified as being either selective or non-selective. Simply put selective herbicides control specific types of weeds and non-selective herbicides work on most plants. For example you might choose a product that selectively controls broadleaf weeds to maintain a dandelion free lawn or a healthy stand of pasture grasses. A non-selective herbicide can be great for keeping your driveway and roadside shoulders plant free. Continue reading


Upcoming Events

* May 16th: TCWP at Elk Fest - 9 a.m. - 1 p.m. Saturday. Stop by the Jackson Town Square TCWP booth to learn about our new education campaign: PlayCleanGo! Many games and activities for kids! More info

* May 21st & June 2nd: Map Invasives JH class May 21st - 5:30 - 7:30 p.m. at the Teton County Library meeting room A. Light dinner will be served! For more info visit MapInvasivesJH. June 2nd class  - 12-2 p.m. at Teton County Jackson Rec Center. Please RSVP 24 hours in advance to Amy Collett at 733-8419 or Email Amy Limited to 20 students.

* May 27th: JHWMA Invasive Species Management Workshop - 8 a.m. - 5 p.m. at the Teton County Fair Building - Exhibit Hall. Free! Click here for more details

* June 6th: TCWP at 25th Annual Kids Fishing Day - 10:30 a.m. - 3:00 p.m. at the Sleeping Indian Pond, Jackson National Fish Hatchery. Contact Tracy at (307) 733-2321 for more information.
Thank you for subscribing to the Teton County Weed and Pest District Newsletter. We hope that you find the information useful! If there are any topics that would be of interest to you, please email me your suggestions.




Amy Collett

Teton County Weed and Pest District