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Showing 1 - 10 of 32 results.

How long do weed seeds survive in the soil?

Weed seeds can survive in the soil for years before they germinate and grow.

Feb 19, 2003 | News Story

Methods to control blackberry thickets

It could take years to eradicate a large patch of blackberries, because so many seeds remain in the soil. But with good timing and dedication, property owners can reduce a sprawling blackberry thicket to a few manageable stragglers

Mar 26, 2010 | News Story

Management Strategies for Dealing with Select Poisonous Plants in Oregon

Rangeland, pastures and hay fields throughout Oregon often contain poisonous plants that are potentially dangerous to cattle and other livestock.

Andy Hulting, Karin Neff | Sep 2019 | Publication

Plants Causing Nitrate & Oxalate Poisoning in Pastures

Some plants absorb excess nitrates or oxalates from the soil and store them in plant tissues. Toxicity problems can occur in animals which feed on these plants.

Mylen Bohle, David Hannaway, Andy Hulting, Karin Neff | Apr 2018 | Educational Document

Scotch Thistle

Scotch thistle was introduced to the United States in the 1800s as an ornamental plant from the Mediterranean region. It is a noxious weed in Idaho, Oregon, and Washington. Scotch thistle can form dense, virtually impenetrable stands in low- to high-fertility soils. This publication provides information for identification, management, and control.

Sep 2003 | OSU Extension Catalog

What should I be doing now for weed control?

Q: The straw mulch I used at the end of summer to suppress the weeds doesn't seem to be working. Should I till it and cover with plastic? black or clear? Is there something better. Or should I add more straw. I could probably bring some cardboard home from work. Is this a healthy option?

A: View answer | View all featured questions

Russian Thistle: Management in a Wheat-Fallow Crop Rotation

Reviews Russian thistle biology as it relates to management, including seed dormancy and longevity in soil, seed distribution, seed germination and emergence, plant growth after establishment, crop competition, and resistance to herbicides. Outlines key considerations for managing for 3 crop years and 1 fallow year. Describes results from a residue management experiment designed to determine how to reduce tillage while maintaining winter wheat production.

Aug 2019 | OSU Extension Catalog

Integrated Management of Mayweed Chamomile in Wheat and Pulse Crop Production Systems

In small grain and pulse crops throughout the high rainfall zones of the Inland Pacific Northwest, mayweed chamomile is a troublesome weed. Individual plants can produce as many as 17,000 seeds, and seed remain viable in the soil for many years. This publication outlines integrated management strategies for mayweed chamomile, highlighting the importance of preventing seed production.

Andy Hulting | May 2017 | OSU Extension Catalog

Perennial Weed Biology and Management

Explains how simple and creeping perennial weeds reproduce and spread. Covers weed seedbanks, seed dormancy in soil, and factors that influence seed germination. Describes the typical root structure of perennial weeds and the various ways perennial weeds compete with crop plants for water, nutrients, and light. Discusses the advantages and disadvantages of various methods to control ...

Mar 2001 | OSU Extension Catalog

Reduce Weeds by Friending Grasses

Are weeds a never-ending challenge for you? If so, consider looking at them from a new angle. Instead of spraying or digging weeds out year after year, concentrate on making your grass happy. The factors that promote optimal grass health and production work against weed growth. What is good for grass is not good for weeds.

Susan Kerr, Tim Miller | Oct 2017 | Article