Wisconsin Crop Manager newsletter

Author:	WCM Staff	Created:	4/27/2006 3:56 PM
That's sick! Articles concerning plant pathology in Wisconsin field crops.

Flag Leaf Emergence and Foliar Fungicides in Winter Wheat

By WCM Staff on 5/27/2008 11:46 AM

Winter wheat is at or near to the flag leaf (Feekes 8) growth stage throughout the state. This is an important time to actively scout wheat fields to most effectively determine if the use of a foliar fungicide will be needed.

Risk for Soybean Rust in Wisconsin Currently Low – May 2008

By WCM Staff on 5/15/2008 11:58 AM

Recently, we received an email asking about the risk for soybean rust in Wisconsin in 2008, especially since growers are considering altering planting plans with the wet conditions found in parts of the state. In examining the situation in the southern U.S., the current risk of soybean rust in Wisconsin is low.

UW-Extension/Madison Plant Disease Diagnostic Clinic (PDDC) Update

By WCM Staff on 5/15/2008 11:57 AM

The PDDC receives samples of many plant samples from around the state. The following diseases/disorders have been identified at the PDDC since May 7, 2008:

Proline Fungicide Approved for Soybean Rust and Powdery Mildew

By WCM Staff on 4/24/2008 12:19 PM

Recently, EPA approved a master Section 3 label (as of 03/24/2008) for ProlineÔ Fungicide from Bayer Crop Science for use in soybean against soybean rust (Phakopsora pachyrhizi) and powdery mildew (Microsphaera diffusa). To legally use ProlineÔon soybean, growers will need to have in their possession the existing container label as well as the supplemental label that Bayer Crop Science is allowed to market.

Soybean Disease Diagnosis at Emergence and Seedling Growth Stages

By WCM Staff on 4/24/2008 11:44 AM

The 2007-2008 winter, and the early portions of the spring season, has brought substantial moisture into many parts of the state. With further rain forecasted throughout the state over the next few days and weeks, it is important to understand how early season soybean development may be compromised by several plant pathogenic fungi that cause seed rot, seedling mortality, and root and stem decay.

Understanding and Using the Fusarium Head Blight Prediction Center

By WCM Staff on 4/23/2008 2:26 PM

In this article, we will illustrate how you can obtain updated risk assessment information using the Wheat Fusarium Head Blight Prediction Center. This is an online risk assessment tool that can be found at http://www.wheatscab.psu.edu

UW-Extension/Madison Plant Disease Diagnostic Clinic (PDDC) Update

By WCM Staff on 4/10/2008 3:17 PM

The PDDC receives samples of many plant samples from around the state. The following diseases/disorders have been identified at the PDDC since January 1, 2008:

Foliar Fungicides for Winter Wheat in 2008 - PDF file

By WCM Staff on 4/10/2008 12:52 PM

One major question that has been raised is whether foliar fungicides will help improve wheat yield in Wisconsin. Current knowledge and information from the U.S. winter wheat regions would suggest that “yes” foliar fungicides could be beneficial. However, in order to most effectively consider the use of a foliar fungicide requires knowledge of your entire production system.

Identifying Wheat Diseases Controlled by Foliar Fungicides - PDF file

By WCM Staff on 4/10/2008 12:17 PM

When considering the application of a foliar fungicide to wheat, it is critical that proper identification of the foliar diseases takes place. Proper identification is important for noting which diseases are present, as well as what the level of severity is, as different disease thresholds exist for applying a foliar fungicide. Furthermore, not all wheat diseases, especially viruses and Take-All, will be affected with foliar fungicide applications.

Soybean Rust Fungicide Manual Available Online

By WCM Staff on 2/13/2008 3:52 PM

Recently posted and available through The Ohio State University is a new soybean rust fungicide manual, “Using Foliar Fungicides to Manage Soybean Rust”.

Changes in Fungicide Status for Soybean in 2008

By WCM Staff on 1/16/2008 1:53 PM

Some Section 18 labels have expired as of November 10, 2007. The expiration date was after the publication of Pest Management in Wisconsin Field Crops-2008 (A3646), available through UW-Extension, and we felt that it was important to provide a summary update regarding these changes.

Soybean Stem Canker in 2007

By WCM Staff on 12/7/2007 2:16 PM

Multiple positive soybean stem canker samples have been received by the Plant Disease and Diagnostic Clinic and based on the location of positive detections, it appears that the majority of soybean stem canker samples formed a “U-shaped” pattern from the northwestern part of the state down to the south, before arcing back northwards towards Outagamie, Brown, and Kewaunee Counties.

UW-Extension/Madison Plant Disease Diagnostic Clinic Update Sept 6, 2006

By WCM Staff on 9/21/2006 7:45 PM

The Clinic receives samples of many field, forage, fruit and vegetable crops from around the state. The following diseases are what we identified since August 29, 2006:

UW-Extension/Madison Plant Disease Diagnostic Clinic Update Aug 31

By WCM Staff on 9/7/2006 9:33 AM

The Clinic receives samples of many field, forage, fruit and vegetable crops from around the state. The following diseases are what we identified since August 22, 2006: see table