Locoweed Research

RR 730 Tracy M. Sterling and David C. Thompson

College of Agriculture, Consumer and Environmental Sciences New Mexico State University

Preface  Overview

Astragalus and Oxytropis poison livestock with different toxins
Defining the chemistry and biochemistry of swainsonine
How locoweed poisoning develops and progresses
Locoweeds reduce reproductive performance in livestock
Grazing locoweed can increase incidence of congestive right-heart failure
Locoweed alters ewe and lamb behavior
Low-level locoweed consumption alters blood chemistry in sheep
Looking for ruminant bacteria that can detoxify swainsonine

Ecology and physiology
Describing the common locoweeds and milkvetches of New Mexico
When rain falls may affect locoweed density
Drought-stressed locoweed contains more swainsonine
Walshia miscecolorella caterpillars may alter swainsonine levels in white locoweed
Locoism may trace back to fungi infecting locoweed


Common locoweed-feeding insects
Understanding the locoweed weevil's life history and damage potential
Locoweed weevils prefer certain varieties of locoweed
Are rangeland insect spray programs enhancing weed problems? Chemical
Controlling locoweed with herbicides
Do differences in locoweed leaf surfaces affect herbicide uptake?
Understanding why white locoweed is more sensitive to herbicides than woolly locoweed
Improving herbicide application for locoweed
How long does locoweed control last? Grazing
Reducing locoism with management decisions
Managing cattle to prevent locoweed poisoning
Developing locoweed-free pastures
Degree of locoweed poisoning predicts yearling stocker performance Economics
Locoweed poisoning causes economic losses for yearling stocker enterprises
Healing locoweed-poisoned cattle before sale decreases economic losses
The economic value of having a locoweed-free area
Averting cattle from consuming locoweed can save money Recent locoweed publications

ew Mexico State University is an equal opportunity/affirmative action employer and educator. NMSU and the U.S. Department of Agriculture cooperating.

Printed January 1999
Electronic Distribution March 2002