Home Horticulture

Adult Boxelder Bug and Nymphs
Adult Boxelder Bug and Nymphs
Bronze Birch Borer Damage
Bronze Birch Borer Damage
Brown Marmorated Stink Bug, Adult Female
Brown Marmorated Stink Bug, Adult Female
Tegenaria agrestis
Male Hobo Spider
Sequoia Pitch Moth damage on a Austrian Pine Tree
Sequoia Pitch Moth damage on a Austrian Pine Tree
Spotted Wing Drosophila Fly, Adult
Spotted Wing Drosophila Fly, Adult

The Central Oregon Horticulture Program is responsible for providing education to the residents and commercial green industry of Crook, Deschutes, and Jefferson Counties. We provide this education through seminars, workshops, publications and several other ways.

We also serve as an outlet for all of your gardening questions. You can either call or visit our plant clinic.  We will assist you in identifying your weed, disease, and insect problems and recommend safe and research- based management for these issues.

The Horticulture staff and local OSU Master Gardeners give presentations on regional garden topics throughout the year. We also have several garden publications available to you at little or no cost. We provide annual OSU Master Gardener training in the tri-county area for those interested in a great volunteer opportunity.

The High Desert Gardening Newsletter is published 5 times a year. A sample copy is available for you to view.  The cost is $10 per year for a color, mailed copy and a one-time set-up fee of $5 to receive it by email.

For more information, please contact:

Amy Jo Detweiler, Associate Professor
OSU Horticulture Faculty for Central Oregon
Telephone: 541-548-6088 X 7951

Email: Amy Jo Detweiler  or click here ◊

OSU Crook County Extension Service
498 Se Lynn Blvd.
Prineville, OR 97754
(541) 447-6228

-  General Information/Resources  -

  • Publications (Link)
    View 100+ publications...
  • "NEW" 2015 Pest Management Guide
    For tree fruits in the Mid-Columbia area: Hood River, The Dalles, and White Salmon.
    https://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/45153/em8203 (pdf)
  • Central Oregon Food Policy Council (Link)
    Their mission is to support a community based food system in Central Oregon and to increase access to fresh healthy food, support sustainable farm land use, and foster relationships among farmers and consumers.
  • Fire-Resistant Plants for Home Landscapes (pdf)
  • Winegrowers Association of Central Oregon (Link)
    Their mission is to elevate Central Oregon's unique High Desert Vineyards and Wineries into International prominence through the development and promotion of world class sparkling and still wines.



  • Bee's, Yellowjackets and Wasps (Link)
  • Boxelder Bug (Link)
    Boxelder bugs do not cause significant damage to landscape plants, and management need only be directed at keeping them out of homes, where they may become a nuisance.
  • Bronze Birch Borer (Link)
    The Bronze Birch Borer, Agrilus anxius, is common east of the Cascades. Damage to trees can be severe, often deadly.
  • Brown Marmorated Stink Bug (pdf)
    The brown marmorated stink bug is a voracious eater that damages fruit, vegetable, and ornamental crops.
  • Cicadas (pdf)
    Life history, habits, natural enemies and control of Cicadas.
  • Dead Branches, Dead Tops & Dead Trees:  The Interaction of Water Stress, Insects & Disease (pdf)
  • Living with Wildlife-SNAKES (pdf)
    Oregon's 15 Native Snakes
  • Sequoia Pitch Moth (pdf)
    The adult moth is clearwing with yellow and black markings resembling yellowjacket wasps. The larvae are about 1 inch long, yellowish, with a reddish brown head. Larvae feed by boring into branches or trunks. At the point where the larva enters the wood, small to large masses of creamy yellow to pinkish pitch accumulate. The larva feeds locally underneath the pitch mass. This pest causes mainly aesthetic damage because of the pitch masses.
  • Spotted Wing Drosophila Fly (Link)
    Spotted wing drosophila (SWD), Drosophila suzukii, is an insect pest of economically valuable small fruit and tree fruit crops. Known in Oregon and the Pacific Northwest since about 2009, this species now appears to be established in many fruit growing regions around the country. Growers and researchers are working together to implement effective pest control strategies.
  • Two Ways To Uproot Your Lawn (Link)

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