Livestock & Forage

Cows in pasture

Livestock, Forage and Pasture Management Extension Education for Yamhill, Polk, Marion, Multnomah, Washington and Clackamas Counties


Blue Green Algae Notice - June 26, 2017

Check large water tanks and especially ponds as the weather warms and dries.  A Lake County producer with livestock that water from a moderate size reservoir on his property has faced a significant Blue Green algae bloom in this water body. Water samples and rumen content samples have been sent for analysis to confirm but all signs are pointing to the algae toxin as the culprit.  The suspected toxin produced in this bloom has killed 28 head of cattle that had access to this water. The cattle were moved when the issue was discovered but exposure to the toxin can result in death up to 48 hours following exposure.

Blue-Green Algae Poisoning


2017 Mid-Willamette Livestock Newsletter


Livestock Grazing, Nutrition & Management - Recorded webinar part 1

Managing Pastures for Longevity (with Grazing?) - Recorded webinar part 2

Porcine Reproductive & Respiratory Syndrome - video



-see Animal Science link below

ALERT: Grasshopper Infestation

-see Pastures link below

ALERT: True Armyworm Infestation

-see Pastures link below

ALERT: Rust in Orchardgrass Hay Fields

-see the HAY link below

ALERT: Tansy Ragwort  Info

ALERT: PEDv in Oregon  - Informational Session

Information on the following subjects is available to livestock and forage producers:

NEW PUBLICATION:  Selenium Supplementation Strategies for Livestock in Oregon (EM9094) (pdf)

The Oregon State University Extension Livestock and Forage Information Newsletter,  "Mid-Willamette Livestock Letter", is posted on this page when a new edition is published.  If you would like to receive new editions of the newsletter by email, please contact Pam Scharf by calling 503-623-8395 or EMAIL your request to be added to the newsletter mailing list.

Contact Information:

Gene Pirelli - Regional Extension Livestock and Forage Specialist
Office: 503-623-8395 (Polk County Extension Office)
Cell: 503-931-5163 (Monday through Friday)

Polk County Extension Office Hours:
Monday through Friday, 8am-Noon and 1-5pm (closed noon-1pm)

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