Herbicides applied in the fall often can provide improved control of many winter annual weed species compared with similar applications made in the spring. Marestail is one example of a weed species that is often better controlled with herbicides applied in the fall compared with the spring. … Read more
Producers in western and west-southwestern Illinois may have observed symptoms of Diplodia ear mold during harvest.
Diplodia Symptoms and Machinery Adjustments at Harvest. Diplodia ear mold can cause lightweight kernels with a dull grey to brownish color and sometimes small black structures call pycnidia (Figure).… Read more
Soybean rust (Phakopsora pachyrhizi) has been found in southern Illinois. Samples were collected in Williamson county on 9/11/16 to make observations for other fungal foliar leaf disease. Soybean rust was found sporulating in pustules on the bottom surface of the leaves. … Read more
Corn Earworm, European Corn Borer, Fall Armyworm, or Western Bean Cutworm: Which One Is Causing the Injury I’m Finding on My Corn Ears?
Several questions about injury on corn ears has made it way to my desk the past week.
Insect injury to corn ear (photo courtesy of Duane Frederking).
Damaged ear tips, missing kernels, and fungal pathogens are all being reported.… Read more
Corn leaf samples from LaSalle county have been positively identified by the University of Illinois Plant Clinic to be infected with Tar Spot Phyllachora maydis. Commercial Agriculture Extension Educator Russ Higgins found the disease while field scouting. … Read more
Extension Staff Join with other Agencies to Survey Illinois for New Corn Disease 2016: The USDA just announced the presence of Bacterial leaf streak in corn, as determined by recent surveys of the Corn Belt states. … Read more
Insects require a certain amount of heat to develop from one stage in their life cycle to another (eggs to larvae to pupae to adults). Degree-days measure insect growth and development in response to daily temperatures.… Read more
Once again, statewide surveys of insects in corn and soybean fields were conducted during the summer of 2016. A total of 33 counties were surveyed this year. The surveys were performed during the first week of August by sampling five corn and five soybean fields per county.… Read more
Agronomy Day is a collaborative field day hosted by the Department of Crop Sciences in partnership with several academic units in the College of Agricultural, Consumer and Environmental Sciences (ACES). From nitrogen management to drone demonstrations Agronomy Day shares cutting-edge research with practical implications for your farm or business.… Read more
Although my post last week reflected the current optimism about yield prospects for the 2016 Illinois corn crop, there has been some recent discussion about unfilled ear tips and whether or not this might mean lower yields than the appearance of the crop leads us to believe.… Read more