Entries by earthling

First Note – 2011 Winter Wheat Workshops

As you plan your 2011 winter meeting schedule, this is a first note to say that we will again be offering our winter wheat workshops that have been taught in 2009 and 2010, respectively. We have locked in dates and tentative locations (i.e., counties) with more details to follow. Currently the workshops as scheduled for: […]

Survey Request – Fusarium Head Blight Prediction Center

Fusarium head blight (FHB) of wheat has been an important problem in Wisconsin with regional disease outbreaks occurring between 2007-10. The disease causes significant yield loss and damaged grain is often contaminated with the mycotoxin deoxynivalenol (DON), commonly known as vomitoxin. The disease is best managed through a combination variety resistance, and timely application of […]

Resistance to Strobiliurin Fungicides

Today (20 October), a report out of the University of Illinois confirmed that a field in Tennessee where frogeye leaf spot was found and sprayed twice with a strobilurin fungicide but still had high levels of the disease was because the pathogen that causes the disease (Cercospora sojina) was resistant to the fungicide. This finding […]

Current Statewide Findings for SDS and BSR

With additional reports of sudden death syndrome (SDS) in soybean fields including areas of the state we have not previously detected SDS, we are receiving increased numbers of questions if we have detected brown stem rot (BSR) as well in these fields. First off, not every field will have SDS as we have seen several […]

Reports of Frogeye Leaf Spot in Soybean

Over the past week, we have had reports of Frogeye leaf spot in soybean. Frogeye leaf spot is caused by the fungus Cercospora sojina. DATCP noted finds of this disease in some fields in the southern part of the state. While Frogeye leaf spot has been documented in Wisconsin, it is still a disease that […]

Late Season Stem Diseases – Look Closely…

We are receiving questions and also samples this year that are similar to fields we visited during the 2007 and 2008 growing seasons. As a reminder, the focus for many of those field visits were specifically if there was a breakdown in the Rps 1K gene for Phytophthora. A summary of that information is available […]

Scouting for Sudden Death Syndrome in Soybean

With soybean in the R4 to R5 growth stage in many areas of the state, we are starting get reports of plants expressing symptoms that for many (given the longer history in the state) would be identified as Brown stem rot (BSR) (Figure 1). A sample received into the lab earlier this week, however, showed […]

Reports of White Mold – Soybean Too Late to Spray

We are starting to receive reports of white mold in soybean. With the exception of later planted soybean, most of the soybean crop is at the R4 into R5 growth stage. As you scout the soybean crop, areas of wilted soybean plants may be indicative of white mold (Figure 1). Closer inspection of the wilted […]

Risk Factors Associated with White Mold in Soybean

With the soybean crop moving closer (or in some cases at) flowering, now is an excellent time to review factors that may impact the risk of white mold in 2010 (caused by Sclerotinia sclerotiorum). The first two factors that should be considered have already occurred…knowledge of the field history of the disease and the level […]

White Mold Video Available on UWEX YouTube

As we move further into soybean development, we have started to receive an increase in questions about white mold (syn., Sclerotinia stem rot). During 2009, we made a video that is available on the UWEX YouTube webpage that discussed many of the factors we need to consider regarding the risk of white mold in soybean […]