There have been many reports of black areas in soybean fields in Indiana this season.
83 articles tagged "Plant Diseases".
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.
Southern corn rust has now been confirmed in four counties (Knox, Dubois, Warrick, and Shelby) this week in Indiana (Figure 1). While tar spot continues to be documented across the state (Figure 2). I suggest if you have not gotten out and looked for these diseases now is the time. Even if your corn is approaching black layer it will be important to document tar spot in your fields for the future disease management decisions. There are currently 41 counties with a positive confirmation of tar spot (Figure 2). As we are learning this season when we have had favorable environmental conditions there may be pockets of tar spot even in areas that have not seen the significant yield impacts previously. In the map all gray counties indicate that tar spot was found in the county in previous seasons. I have been getting many questions on if a late season[Read More…]
Red crown rot of soybean has become a new concern this season in Indiana after a few localized occurrences have been found in previous years (see map, Figure 1A). We also have our first reports for 2024. This disease is caused by the soilborne fungus, Calonectria ilicicola. At this point in the field season, we are on the hunt to determine how widespread the issue may be here in Indiana. Therefore, we need your help in documenting red crown rot and collecting samples. What to look for: The disease may appear in patches in a field similar to our other soilborne diseases such as sudden death syndrome (SDS) and brown stem rot (Figure 1B). Early foliar symptoms may also mimic these diseases, which include chlorosis (yellowing) and necrosis of leaf tissue between leaf veins (Figure 1C). Therefore, it is important to take a few plant samples and check out the[Read More…]
It is important to continue to scout for diseases in both corn and soybeans.
We are starting to see common diseases in the lower canopy of corn, as we were out scouting this past week as early planted corn has begun to tassel in Indiana.
The field crop pathology research program is continuing to track the distribution of corn and soybean field diseases in Indiana.
Corn growth stages are quite variable across Indiana but a number of areas with early planted corn about waist high.
The USWBSI is supporting a national research project to conduct fungicide sensitivity test of Fusarium from wheat and barley and we are looking for samples from grower fields in Indiana.
Wheat harvest will soon be upon us in Indiana. Fusarium head blight (FHB) or scab is one of the most important diseases of wheat and most challenging to prevent.
