We are continuing to track the activity of tar spot.
104 articles tagged "Plant Diseases".
Questions about tar spot management were already beginning to surface as corn planting nears completion across Indiana.
Wheat development continues across Indiana. In central Indiana, wheat is currently flowering (Feekes 10.5), while wheat in our southern Indiana research plots has advanced to the dough stage (Feekes 11.2).
It is time to keep an eye on wheat for diseases and scab risk. There are a number of foliar diseases in wheat to watch out for. These include – leaf, strip and stem (Fig. 1A, B, C), Septoria leaf spot and tan spot (Fig. 2A, B). A number of resources are available to help distinguish wheat leaf diseases and “Identifying Rust Diseases of Wheat and Barley” and Crop Protection Network Encyclopedia Wheat plant samples can always be submitted to the Purdue Plant Pest Diagnostic Lab for disease identification and confirmation. Wheat in southern Indians was flowering (Feekes 10.5.1) when I was in our plots in Vincennes on Saturday (April 25), which is a week or so earlier than I expected. Our plots in West Lafayette were at Feekes 9 (ligule of last leaf just visible). During flowering (anthesis, Fig 3A) warm, wet weather with high relative humidity will favor[Read More…]
I would like to remind everyone on the resources available for monitoring field crop diseases here in Indiana as planting progresses. The Purdue Field Crop Pathology Team will be tracking diseases across Indiana and will post updates here in Pest & Crop, on our website https://indianafieldcroppathology.com/ and with the Crop Protection Network Crop Lookout Tool (https://cropprotectionnetwork.org/crop-lookout). You can also follow me on X @DTelenko. National disease tracking and prediction programs are place to monitor for some the more economically important diseases in the U. S., such as Fusarium head blight in wheat (Fig. 1), wheat stripe rust (Fig. 1), southern rust of corn, and tar spot (Fig 2). In addition, the Crop Protection Network site hosts collaborative outputs on important issues affecting field crops in the U. S. and Canada, this site has numerous resources and fungicide efficacy tables for corn, soybean, and wheat. There are also a few other[Read More…]
In Indiana, five ear rots can lead to mycotoxin production in corn.
It is now time to evaluate fields for any stalk or ear rot symptoms. This will aid in making assessments about field harvest order and if there is a risk of mycotoxin contamination.
A number of foliar diseases have made an appearance in corn across Indiana.
Southern corn rust has now been confirmed in two counties (Knox and Warrick) and we are awaiting samples from Porter, Shelby, Bartholomew, Decatur, Jennings that are highly probable for this week in Indiana (Figure 1).
Red crown rot of soybean continues to be a concern this season in Indiana. We have our first reports for 2025 in fields that have had a previous history.
