Integrated Pest Management

Methods of Mechanical Control:

1. Pull the weed out of the ground, trying to get as much of the root as possible
    1. always use gloves to ensure that the plant does not cause harm if it is poisonous (Poison hemlock will cause a bad rash on your hands)
2. Dig up the weed with a shovel.
        1. Push the shovel into ground on 4 sides of the weed, then slide shovel under plant to cut off root
        2. Pull the weed out of the ground by hand, thus minimizing DISTURBANCE
3. Plowing or Disking
    1. Make sure you have a revegetation plan prior to disturbing a large tract of land

Biological Control of Noxious Weeds

Biological control is a portion of the integrated pest management program where either an animal (goats, sheep, livestock) or a specific insect is utilized to reduce the impact the weed is having on the environment.

Classical Biological Control is where non-native pests (generally insects) are brought into the country from the ‘Weeds” native country and is used to feed on the weed, thus reducing the overall impact of the weed.

When non-native insects are utilized, they have gone through extensive studies, some up to 10 years, to ensure (under APHIS) that this new non-native (exotic) does not become a new invasive species itself. University of Idaho has one of the leading biological control researchers in the United States, Professor Mark Schwartzlander. Under his leadership Idaho is looking for numerous new insects as well as rearing many necessary insects so that they can be collected and shipped throughout Idaho.

One particular location that has been established in Idaho, thus the Pacific Northwest, is the Nez Perce BioControl Center located at Nez Perce Tribal lands in Lapwai, Idaho. With their help collecting and distributing the needed insects, weed impacts have been reduced greatly.

The Bureau of Land Management is heavily invested in promoting the use of insects to combat invasive weeds. Joey Milan, and entomologist with the BLM is a key source of information and training to weed manager across the great state of Idaho.

In Oregon, the Oregon Department of Agriculture has Joel Price, an Entomologist that is helping us establish insects and other biocontrol tools to combat the invasive weeds.

BioControl should never be attempted without bringing in the County Weed Superintendent. This is why!

    1. There is a science to ensuring the right insect is released to the right weed, in the right location, at the right time. Furthermore, all non-native insects must be registered by APHIS and it is illegal to ship in non-approved biocontrol.
    2. The county will generally visit your desired site to ensure it is capable of hosting the insects. Most weed patches need to be over 1/2 an acre in size with a 50% canopy cover to allow the insects to adapt to their new location.
    3. The inspection of the site, the collection or obtaining the insects, and the dispersal of the insect onto the newly determined site is generally done by the county at no cost to the landowner.

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Jeffrey Pettingill
Baker County Weed District
1995 3rd Street
Baker City, OR 97814
Phone: (541) 523-0618
Fax: (541) 524-7666