Seedling disease is running rampant across Illinois soybeans. Many producers are wondering why. Afterall, you used a fungicide treatment. Well, there are many things that could be at play. I describe these in this weeks Field Crop Disease Blog (click here). Remember to sign up for updates!…
With the storm that moved through the state the past week, it is not surprising that we are seeing more seedling diseases in soybeans. In many cases Rhizoctonia has been identified as the causative organism, alone or in combination with other soil issues such as compaction. Rhizoctonia is one of the most common and problematic seedling issues for soybean producers in Illinois, and can cause significant yield losses due to stand reduction and reduced plant growth. …
The following is posted on behalf of Dr. Nathan Kleczewski, Field Crops Pathologist for Growmark. This content is from the Field Crop Disease Hub webpage Dr. Kleczewski curated.
After the recent deluge that moved through parts of the state, some Illinois soybean producers have been hit hard with seedling diseases. A common question many people are asking is, “I used a seed treatment, so why am I having problems with seedling diseases?”
Seed treatments are popular in soybean production systems. …
Warm temperatures continue in Illinois, with growing degree day (GDD) accumulations since May 1 running from 150 above average in northern Illinois to about 250 GDD above average in the rest of the state. With GDD accumulations of 900 to 1,000 since May 1, the corn crop planted in early May is at V10 to V14, about 30 to 60 inches tall, and needing only about 350 to 450 more GDD to tassel and silking. With daily accumulations at about 25 GDD,…
We would like to take this opportunity to once again extend the invitation to attend the 2018 University of Illinois Weed Science Field Day, to be held Wednesday, June 27th at the University of Illinois Crop Sciences Research and Education Center, located immediately south of the main campus on South Wright Street. Coffee and refreshments will be available under the shade trees near the Seed House beginning at 8:00 a.m. The tour will provide ample opportunity to look at research plots and interact with weed science faculty,…
The following article was written by Lauren Quinn, media specialist in the College of Agricultural, Consumer and Environmental Sciences at the University of Illinois. The article describes recently publiched research, lead by Dr. Adam Davis, a research ecologist with USDA-ARS and adjunct professor in the Department of Crop Sciences, that examined cooperative weed management as a tool used against the challenges of herbicide-resistant waterhemp. The following quote from Dr. Davis succinctly summarizes the research: “The crux of the story is that if you do good stuff and you aggregate it at larger spatial scales,…
Soil-residual herbicides are important components of integrated weed management programs. Reducing the number of weeds exposed to foliar-applied herbicides helps reduce the selection intensity for weeds resistant to foliar-applied herbicides. Residual herbicides applied with postemergence soybean herbicides also can reduce the need for a second postemergence application. However, simply applying a soil-residual herbicide does not guarantee the product will provide the desired level or duration of weed control. Many edaphic and environmental factors influence the level of weed control achieved by soil-residual herbicides.…
Authors: Talon Becker and Nathan Kleczewski
Among the various soybean pests, Heterodera glycines Ichinohe, known by most as soybean cyst nematode (SCN), continues to be a persistent cause of yield loss for soybean producers1. SCN has been found in every county in Illinois, as well as much of the eastern United States, Puerto Rico, and parts of Hawaii and Canada2 (Figure 1).
Figure 1.
Map of the known distribution of the soybean cyst nematode,…
The following is posted on behalf of Dr. Nathan Kleczewski, Field Crops Pathologist for Growmark. This content is from the Field Crop Disease Hub webpage Dr. Kleczewski curated.
Soybeans have started to emerge, and as you may expect, this is a prime time to scout fields for early season seedling diseases. Seedling diseases are caused primarily by fungi or fungal like organisms that , under the correct conditions (moisture, temperature, susceptible variety) can colonize the seed or germinating seedling and cause the seedling to die before it reaches the soil surface,…
Now is the time that seedling diseases of soybeans will start to be apparent. Indeed, we have started to see more images of soybeans that may have symptoms of seedling disease. However, it is important to understand that seedling diseases are complex, and a simple picture often is not sufficient to adequately diagnose the issue. I wrote a more extensive of seedling diseases of soybean on the Illinois Field Crop Disease Blog, which can be accessed here…