Author Archive | Lisa Kilders

Dispose of Pesticides at No Cost

Bring in your old, unusable pesticides for safe disposal!

Bring in your old, unusable pesticides for safe disposal!

Take advantage of this opportunity to safely and anonymously dispose of old and unusable pesticides.

Clackamas Soil and Water Conservation District is partnering with Clackamas River Water Providers to offer a 2016 Pesticide Round-up! This collection event is for waste agricultural pesticides, from producers in Clackamas County. We focus on the Clackamas River watershed, but all producers in the county are eligible and encouraged to participate.


You must pre-register with the disposal service so they are prepared to receive your chemicals. Due to limited funding this event is first reserved, first served. Complete and send application by mail, fax, or e-mail to Clean Harbors Environmental by October 28, 2016. After that date, call Clean Harbors for any open reservations.

Download Application/Registration Forms:

Pesticide Round-up Application
Pesticide Round-up Application
Version: November 2016
97.6 KB

or call Clean Harbors Environmental Services 360-607-5434

Submit Registration Forms to:
Clean Harbors Environmental Services
16540 SE 130th Ave. Clackamas OR 97015
E-mail  or FAX: (503) 655-3952

Taylor Simpson at Clean Harbors Environmental Services will answer questions about pre-registration and disposal.
Call: Taylor at (360) 607-5434

Pesticide Status

If you need to check the status of a pesticide, call: Oregon Department of Agriculture at 503-986-4635

If you are having trouble identifying the active ingredient of a pesticide, or are concerned about leaking or degraded containers, please contact Lisa Kilders at 503-210-6002 so she will direct you to a resource for technical assistance.

Plastic Container Recycle

We will also collect clean, “dirt and residue free”, triple rinsed plastic containers.

Check this website for information on preparing containers to recycle.

All size containers up to 55-gallon capacity plastic drums can be accepted. Containers need to be made from high density polyethylene (HDPE) and embossed with recycling symbol #2.

No pre-registration is needed for dropping off empty, triple-rinsed pesticide containers. This is a free service.

Questions on plastic container recycling contact Agri-Plas Inc. at 503-390-2381 or send them a message.

Use Sunny Fall Days to Prepare for Winter

As those rainy days of winter loom on the horizon, take advantage of the sunny, warm fall days to prepare your farm for winter! Tackling maintenance and good management practices now may help you avoid hours of cold, wet emergency repairs this winter.


Take actions now for a healthy pasture next spring!

Take actions now for a healthy pasture next spring!

During the busy days of summer, routine maintenance of fence lines and scouting for trouble spots may have landed on the back burner. Look for broken or sagging wire, unstable posts, and gate problems. If you have electric fences, make sure to mow surrounding weeds and grasses that may short out the system. Clean solar panels to collect as much sunlight as possible. Repost any missing or damaged “no trespassing” or “no hunting” signs. Avoid hunters tragically mistaking livestock for deer or elk.


Fall management of pastures has a great deal to do with the health of your pastures next year. This is the time of year for new root growth and storage of carbohydrates in the lower 3-4 inches of the stem. Any management of a pasture that hinders these two processes will mean problems for your pasture in the spring.

The following advice is from Gene Pirelli, Extension Animal Scientist, Oregon State University, and Steve Fransen, Extension Forage Agronomist, Washington State University taken from their article, PASTURE MANAGEMENT: UNDERSTANDING PLANT AND ROOT GROWTH IN THE FALL.

Grass plants can be grazed down to a minimum height as shown in Table 1, but not grazed below that height. These recommended minimum stubble heights allow the plants the ability to store carbohydrates for vigorous re-growth in the fall. Grazing below this height will decrease your fall feed and subsequent spring growth.

Table 1. Recommended residual heights for some grasses during dormant periods

Grass MinimumStubble Height
Tall Fescue3-4 inches
Smooth Brome3-4 inches
Perennial Rye Grass2 inches
Orchard Grass3-4 inches
Meadow Brome3-4 inches
Bluegrass3-4 inches
Timothy4-6 inches

Fall is a great time to take soil samples to test the fertility of the pasture soil. Soil tests should be taken during the same month each year for consistency. Early fall is also a good time to apply nutrients based on your soil test. Oregon State University Extension Fertilizer Guides can help you decide the type and proper amount of nutrients. Manure or other sources of nitrogen can be applied based on plant nutrient needs, but just make sure that you do not apply too much nitrogen. Vigorously growing plants, resulting from high nitrogen applications late in the fall, are more susceptible to winter damage because the growth retards winter dormancy. An excessive nitrogen application will inhibit the plant from starting into its over-wintering response. High nitrogen tends to reduce sugar concentrations so the plant tries to refill its depleted stubble sugar bank account. If plants are not allowed to rest and prepare for winter, they are very susceptible to winter injury or death from the first major cold winter event. As temperatures change in the fall, plants protect themselves by producing a type of “antifreeze” called “Proline”. This “antifreeze” will accumulate in every living plant cell during the winter period only if excessive nitrogen is not available.
Eastern and western Oregon grass hay growers should follow the same recommendations as folks with pastures. Many grass hay growers with cattle like to move the animals onto the hay field after the last cutting has been removed. This long held practice may do more damage than you realize. The remaining hay stubble is high in storage sugars, just like in the pasture. Livestock tend to readily eat this plant portion because it tastes good. Without adequate storage of basal sugars prior to winter, those plants will have a distinct disadvantage in the spring. If you must graze hay fields in the fall, make sure you’ve given the field adequate time for regrowth to occur and to follow the same guidelines of stubble height minimums as for pastures.
For long-term survival of pastures and hayfields, remember to keep an eye on stubble heights and don’t graze below them. Allow roots to rebuild and shoots to develop by not grazing hard in the fall. Make plans to get on a soil testing schedule, which is usually a test every three to five years. Use that information to make the most economical fertilizer applications. By following some of these management tips, your pasture should be productive for many years.

To read the full text of this autumn pasture management article, click on the link below.

Late Summer-Fall Pastures
Late Summer-Fall Pastures
704.1 KB

Want to Grow Food Later in the Season?

Our friends at Clackamas Community College (CCC) are offering a workshop to those who are interested in extending the growing season for cool weather crops. In addition, they offer a workshop in aquaponics for those who want to grow food indoors all year long!

Make Your Own Mini Hoop House

Extend your season!

Extend your season!

Saturday Oct 8
9:00 AM-10:50 AM
Room Clairmont 117
Fee: $20
Course Code # XHOR-0010
Grow food year round in your own backyard. In this class you will be guided in the construction of your own mini hoop house. Bring up to a dozen, 10ft, 1/2 inch, galvanized electrical conduit.


Saturday Oct 22
8:00 AM-11:50 AM
Room Clairmont 117
Fee: $40
Course Code # XHOR-0018
Aquaponics is a food production system that combines aquaculture with hydroponics. This introductory workshop
will cover water quality, biosecurity, and plant and fish health, as well as the basic science that underlies using fish waste as fertilizer. Participants will get some hands-on experience working with CCC’s home-scale system, and get help evaluating the most appropriate aquaponics system for their needs.

How to Register:

Workshops (XHOR prefix):
Online :
1. Go to CCC website
2. Click on Search for Classes/Workshops
3. At Topic Code (scroll down in the screen) select HORT from drop down menu
4. Select the class and complete registration (requires credit or debit card payment)
[If you have any issues with this process please contact Loretta at 503-594-3292.]

Oakscaping Workshop Opportunities

Landscaping With Oregon White Oakoregon-white-oak

Do you have, or would you like, Oregon white oak in your yard?

We are looking for urban landowners interested in landscaping with oak to support the imperiled Oregon white oak population.

Three opportunities to participate in a workshop/hands-on field day.

October 8, 9, or 15 9:00 a.m. to 1:00 p.m.

Workshops are free, but you must register! Click here to save your space.

Learn about and help install an oak ‘naturescaping’ project at one of three sites in north Clackamas County. Participants receive instruction on native plants for oak and prairie habitats, planting and seeding techniques, plant succession, as well as long-term monitoring and maintenance.

We hope to see you there!




Clackamas River Invasive Species Partnership Project Moves Forward

The Clackamas River Invasive Species Partnership (CRISP) was recently awarded funds totaling $431,250 from Portland General Electric (PGE) through the Clackamas River Hydroelectric Project Mitigation and Enhancement Fund. This award adds to the other contributions from CRISP partners totaling $1,168,750 to implement a comprehensive plan for coordinating the management of invasive weeds in the Clackamas River Basin.

Invasive Weeds Affect Us All

WeedWiselogoInvasive weeds cost Oregon residents millions of dollars each year by reducing the productivity of farmland and decreasing property values, as well as impairing water quality and degrading natural areas important for fish and wildlife. The partnership goals are to mitigate these impacts by helping agencies, organizations, and private landowners work more effectively together to improve these conditions.

“Initial efforts in implementing the goals of the CRISP project will focus on targeted areas of the watershed where partners can begin working together across property lines to improve invasive species management ,” states Sam Leininger, manager of the Clackamas Soil and Water Conservation District’s WeedWise program. “The CRISP partners have identified areas in four priority subbasins where we can hit the ground running and immediately improve conditions in the watershed.”

What Landowners Should Expect

The first step in this project will include landowner outreach to request access along the Clackamas River and its tributaries to conduct site surveys for priority invasive weeds. The survey work will then allow the CRISP partners to coordinate invasive species treatment and restoration efforts where necessary. The treatment and restoration on a property may take several years.

“There are a long list of partners that are contributing their time and effort to this project,” says Leininger. “The CRISP participating partners include the Clackamas Soil and Water Conservation District, the Clackamas River Basin Council, Metro, the 4-County Cooperative Weed Management Area, Bureau of Land Management, Clackamas County Parks, Clackamas County Water Environment Services, Natural Resource Conservation Service, North Clackamas Parks and Recreation District, Oregon Department of Agriculture Noxious Weed Control Program, Oregon Parks and Recreation Department, Portland General Electric, and the United States Forest Service. The CRISP project will help to build upon existing efforts within the Clackamas watershed and ensure that we can all do our work in a better way.”

To find out more about the CRISP project, please visit our Weedwise page.

A New Tool for Christmas Tree Growers – CANCELLED

Local Christmas tree field

Local Christmas tree field

Unfortunately this workshop has been cancelled.

Christmas tree growers, you will not want to miss this opportunity to learn about a new decision making guide for Integrated Pest Management. Join OSU Extension Service and OSU Integrated Plant Protection Center staff to get a first-hand lesson on the use of this new tool for deciding on how to address current pest invasion and long-term solutions.

Also, hear the latest on the evaluation of “softer” insecticides for grand fir aphid. Chal Landgren (OSU Extension Christmas Tree Specialist) will share his recent field trials on this pest of concern.

This is a free event but registration is required. Contact Clackamas County OSU Extension at 503-655-8631 by September 16 to reserve your seat.

September 20, 2016
9:00 a.m. to noon
North Willamette Research and Extension Center

ODA pesticide recertification credits have been requested for this workshop.

Sponsored by: OSU Integrated Plant Protection Center, OSU Extension Service, Oregon Watershed Enhancement Board, ODA Pesticide Stewardship Partnership Program, Clackamas SWCD, Clackamas River Water Providers, and Oregon SARE.