Montana State University

Eva Grimme, Ph.D.

Plant Disease Diagnostician
Department of Plant Sciences and Plant Pathology
121 Plant BioScience Facility
Montana State University
Bozeman, MT 59717-3150

Tel: (406) 994-5150
Fax: (406) 994-7600
eva.grimme@montana.edu

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Recent Alerts

Clethodim Application during the Bloom Period in Field Peas can cause severe Crop Injury (General)
Description: This information is to further clarify the previous MT Ag Alerts on “Field peas not filling pods may be associated with clethodim application”.
Alert Period: 07/27/2015 - 08/28/2015
Submitted By: Prashant Jha
Alert Documents:
Field pea damage may be associated with Clethodim (Cropland Weeds)
Description: We received several complains about field peas that did not fill pods satisfactorily after a Clethodim application. We would ask growers and crop consultants to let us know more information about these cases to help us determine the causes of these problems
Alert Period: 07/23/2015 - 08/27/2015
Submitted By: Fabian Menalled
Alert Documents:
Field peas not filling pods may be associated with clethodim application (General)
Description: We have received samples in the Schutter Diagnostic lab and fielded several phone calls about field peas that did not fill pods satisfactorily this year. All of these cases have been associated with a clethodim herbicide application, and have occurred in northeastern Montana and in the Yellowstone valley.
Alert Period: 07/22/2015 - 08/30/2015
Submitted By: Noelle Orloff
Alert Documents:
English Grain Aphid on Wheat Heads (Cropland Insects)
Description: As wheat crops mature English grain aphids move to the wheat heads to feed. This alert provides information to identify and manage this pest.
Alert Period: 07/15/2015 - 08/31/2015
Submitted By: Kevin Wanner
Alert Documents:
Pest Management Tour offers Credit Opportunities for Pesticide Applicators across North-Central MT. (General)
Description: The Montana State University Pesticide Education and Integrated Pest Management Programs are offering the Pest Management Tour (PMT) for private and commercial applicators across north-central Montana from October 6th – 10th.
Alert Period: 07/14/2015 - 10/14/2015
Submitted By: Cecil Tharp
Alert Documents:
Milestone® Receives a Supplemental Label for Off-Farm Distribution of Hay in Montana (General)
Description: Milestone® (aminopyralid) is an effective chemistry that provides effective management of a wide array of broad-leaf weeds. A supplemental label is now available for use in Montana allowing off-farm distribution of grass harvested for hay.
Alert Period: 07/01/2015 - 10/08/2015
Submitted By: Cecil Tharp
Alert Documents:
Grasshopper Update (Cropland Insects)
Description: Statewide the grasshopper outlook for Montana this year does not look severe, but high populations have been reported from some hot spots. The attached Alert provides an update on current grasshopper populations.Statewide the grasshopper outlook for Montana this year does not look severe, but high populations have been reported from some hot spots. The attached Alert provides an update on current grasshopper populations along with USDA rangeland grasshopper hazard maps for 2014 and 2015.
Alert Period: 06/18/2015 - 07/31/2015
Submitted By: Kevin Wanner
Alert Documents:
Goldsky herbicide SLN (General)
Description: An special local need (SLN) for extended application of Goldsky herbicide has been approved and registered, the label is attached
Alert Period: 06/18/2015 - 08/31/2015
Submitted By: Fabian Menalled
Alert Documents:
Barley Thrips Update (Cropland Insects)
Description: Barley thrips have been reported throughout the golden triangle region. This Alert updates information released earlier in the season.
Alert Period: 06/19/2015 - 07/31/2015
Submitted By: Kevin Wanner
Alert Documents:
The window for THIMET 20-G application (General)
Description: This alert is an update on the window for applying THIMET 20-G for control of wheat stem sawfly.
Alert Period: 06/15/2015 - 09/01/2015
Submitted By: Kevin Wanner & Cecil Tharp
Alert Documents:
Wheat Stem Sawfly and Thimet (Pesticides)
Description: The wheat stem sawfly (WSS) is one of the most damaging insect pests of wheat in the northern Great Plains region. A new application method for the insecticide Thimet 20-G® has received a 24 (C) special local need registration label for control of WSS in spring and winter wheat crops, and research has demonstrated that it is effective.
Alert Period: 06/10/2015 - 08/29/2015
Submitted By: Cecil Tharp
Alert Documents:
Canola Flea Beetle Damaging Canola (Cropland Insects)
Description: Dr. Gadi Reddy at the Western Triangle Ag Research Center has reported outbreak levels of canola flea beetle. This alert provides management recommendations including thresholds for treatment and supporting publications from WTARC.
Alert Period: 06/10/2015 - 07/31/2015
Submitted By: Kevin Wanner
Alert Documents:
Respiratory Protection of Increasing Concern for MT Applicators (General)
Description: The use of highly toxic pesticides that require respiratory protection were on the decline for over two decades. Recently, the use of one highly toxic active ingredient is on the rise due to glyphosate resistant kochia in Montana. This active ingredient is known as paraquat. Paraquat is in such formulations as Devour®, Firestorm®, Helmquat 3SL®, Gramoxone SL®, Cyclone SL 2.0®, Bonedry®, Willowood Paraquat 3SL®, Paraquat Concentrate® and Parazone 3SL Herbicide®. Paraquat is a photosynthesis inhibitor and acts as a non-selective contact herbicide.
Alert Period: 04/27/2015 - 09/23/2015
Submitted By: Cecil Tharp
Alert Documents:
New Special Registration for Repelling Sand Hill Cranes Approved in Montana (Pesticides)
Description: A section 24(c)special use registration was granted for the use of Avipel liquid seed treatment and Avipel dry seed treatment. These seed treatments can be used for the protection of field and sweet corn against Sand Hill Cranes until July 1st, 2019 in Montana. See attached 24(c) labels.
Alert Period: 01/24/2014 - 09/16/2015
Submitted By: Cecil Tharp
Alert Documents: