Due to its relatively recent U.S. discovery and its ability to cause significant production and economic losses, tar spot is often a topic of angst and anxiety amongst corn farmers and agronomists in Indiana.
56 articles tagged "Plant Diseases".
It is important to monitoring for diseases to make an informed decision if a fungicide is necessary.
Wheat in Indiana is starting to head out in southern Indiana and flowering will probably start this weekend.
Support from the SCN Coalition and National Soybean Board will continue to provide FREE soybean cyst nematode (SCN) soil testing this spring to Indiana growers. If you have trouble fields that you have not had a recent SCN test please consider sending in a soil sample to test for SCN. This program will support one sample per Indiana farm to be submitted to the SCN Diagnostics at the University of Missouri. Please print off a form here https://ag.purdue.edu/btny/ppdl/Documents/PPDL-3-W%20SCN%20Survey-MO.pdf to include with your soil sample. Additional samples will cost $25/each. Pack the samples in a box and cushion the samples with packing material so the bags don’t break open during shipping. Ship to: SCN Diagnostics 1054 East Campus Loop University of Missouri Columbia, MO 65211-5315 To soil sampling for SCN The equipment you need for sampling soil for soybean cyst nematode (SCN) is the same equipment you use for taking a[Read More…]
There are a few resources available for monitoring field crop diseases here in Indiana.
In Indiana, tar spot has been an annual concern since 2018 when growers experienced 20-60 bu/A loss. This past season favorable weather conditions led to another severe epidemic where there are reports of fields experiencing 50% reduction in yields across the Midwest.
Both tar spot and southern corn rust continue to be documented across Indiana.
Tar Spot – We continue to confirm counties with active tar spot. Seventeen counties have been confirmed as of July 29, 2021.
It is important to continue to scout for diseases in both corn and soybeans. Recent rains have created favorable environmental conditions for the development of foliar diseases in both crops. In our scouting rounds this week we continue to find gray leaf spot, northern corn leaf blight, and tar spot in corn (Figure 1 and 3), and frogeye leaf spot, downy mildew and Septoria brown spot in soybean (Figure 2). In addition, we continue to add counties with active tar spot and southern rust in Indiana. The most frequent question I have received is, “Should we make a fungicide application?” My response – What diseases are you finding in your field? What is your hybrid/variety susceptibility and field history? What growth stage? Are you irrigating? A fungicide application can be effective at reducing disease and protecting yield, but there are a number of factors that need to consider: the field[Read More…]
Recent rains and increased humidity across Indiana have increased the risk for foliar diseases to develop in both corn and soybean.
