Working together to strengthen and support noxious weed management efforts in Montana.

St. Johnswort

MSU Research updates

Thursday, April 12th, 2012


MSU has published a weed research update.   It includes information on the following:

  • Mechanisms driving nonnative plant-mediated changes in small mammal populations and communities
  • Wild Oat Herbicide Resistance
  • Russian olive removal and revegetation
  • Impacts of saltcedar on ecosystems in Montana
  • Sulfur cinquefoil life history in northwest Montana
  • Vegetation surveys to quantify weed threats
  • Toadflax research
  • Common tansy control in natural areas

Download the MSU April 2012 Monthly Weed Post for complete details.

MSU Montguide: St. Johnswort: Identification, Biology and Integrated Management

Friday, August 12th, 2011


An excerpt from the publication:

ST. JOHNSWORT (HYPERICUM PERFORATUM L.), also known as goatweed and Klamath weed, is an economically important pest in temperate regions worldwide. Although used as a possible natural antidepressant, St. Johnswort causes considerable ecological and economic losses. In addition to displacing desirable plants that are important for wildlife habitat and domestic livestock forage, St. Johnswort also poses risk of poisoning grazing animals. Correctly identifying St. Johnswort and understanding the plant’s life cycle and growth requirements are important for selecting management strategies that will effectively suppress St. Johnswort populations and promote healthy, desired vegetation.

Download the complete 4-page publication for more information  including identification and management.

2010 Statewide Biological Control Monitoring Report

Thursday, October 21st, 2010


APHIS-PPQ completes a second season of the statewide biological control monitoring program in cooperation with Montana Dept. of Ag. and the BLM. Over the past two years, this project has been helping counties, state and federal agencies, and Indian Reservations with monitoring past biological control releases and assessing the potential for collectibility when they find established populations.  Download your copy of  the report for the work completed in 2010.