Blog Archives

Corn Disease Update — Preparing for Foliar Fungicide Application Decisions in Corn

Corn is moving through growth stages quickly, and April planted corn is at or approaching tasseling in many fields across the state. Pre-tassel and tasseling fungicide applications are common, although fungicide use in corn is not always an automatic decision.

Posted in Grains

Sivanto Approved for Sweet Sorghum

Last month, I received notice that our 2021 Emergency Exemption request for Sivanto Prime for sugarcane aphid on sweet sorghum was denied. The reason is that sweet sorghum, including sorghum grown for syrup, has been added to the list of

Posted in Grains, Pesticide Topics

Soybean Gall Midge is Spreading in the Midwest–A 2021 Update

Problem The soybean gall midge, Resseliella maxima (Diptera: Cecidomyiidae), is a relatively new pest in soybean. Although some findings have been reported since 2011 (CropWatch), large populations were noticed in plants located at the edges of soybean fields by late

Posted in Grains

Seedcorn Maggot Seen in Abundant Numbers in Corn and Soybeans

Seedcorn maggots (Figure 1) in corn and soybeans are typically observed during cool and damp seasons and in sites with organic rich soils (manure can be a source of this), including fields with reduced tillage or decaying residue from the

Posted in Grains

Cool Weather and Cutworms

There have been reports of cutworm activity in field crops this spring. Cutworms (Figure 1), combined with slow plant growth due to cool weather, have the potential to result in increased damage to seedlings in some fields.  Corn and soybean

Posted in Grains

Current Weather Conditions are Suitable for Increase Mollusk Activity in Corn and Soybeans

Current Situation in Field Crops Rainy and cloudy days with soggy and cool nights are favorable for mollusk activity. These conditions describe the current weather in Kentucky, which has been conducive to the damage these organisms are causing to soybean

Posted in Grains

Considerations for Fungicide Management of Fusarium Head Blight (Scab) of Wheat

Wheat fields will soon be at the anthesis stage (Feekes 10.51, “flowering”) in Kentucky.  Anthesis is a critical time, as wheat becomes susceptible to infection by Fusarium graminearum, the causal agent of Fusarium head blight (FHB; also known as scab) (Figure

Posted in Grains

It’s Time to Sample for Soybean Cyst Nematode in Your Fields

The soybean cyst nematode (SCN) (Figure 1) causes greater annual yield losses in Kentucky than any other pathogen of soybean.  The last time a formal survey was conducted by the University of Kentucky in 2006 and 2007, approximately 76% of

Posted in Grains

Soybean Disease Webinars to Watch This Spring

Several Crop Protection Network (CPN) Webinars are scheduled for this spring to discuss important soybean disease issues. Martin Chilvers (Michigan State University Associate Professor of Plant Pathology), Carl Bradley (University of Kentucky Extension Professor of Plant Pathology), and Trey Price

Posted in Announcements, Grains

Management of Soybean Cyst Nematode Starts with Soil Sampling this Fall or Spring

Soybean cyst nematode (SCN) (Figure 1) causes greater annual yield losses in Kentucky than any other pathogen of soybean.  The last time a formal survey was conducted by the University of Kentucky in 2006 and 2007, approximately 76% of soybean

Posted in Grains

The Crop Protection Network Needs Your Input!

The University of Kentucky is a partner in the Crop Protection Network (CPN), which develops tools to help farmers, ag industry, and researchers with crop protection decisions. The CPN is a partnership of university Extension specialists across the United States

Posted in Grains

Colonization of Western Kentucky by Brown Marmorated Stink Bug

Status of the Brown Marmorated Stink Bug in Kentucky Halymorpha halys (Hemiptera: Pentatomidae) known as brown marmorated stink bug (BMSB), is a polyphagous invasive species of Asian origin that feeds on more than 100 plant species in the U.S. Initially,

Posted in Grains

Stink Bug Populations Surpassing Economic Thresholds in Soybeans in 2020

Several stink bug (Hemiptera: Pentatomidae) species (Figure 1) are key pests of soybeans in Kentucky. They include the green stink bug (Chinavia hilaris), brown stink bug (Euschistus spp.), southern green stink bug (Nezara viridula), brown marmorated stink bug (Halymorpha halys)

Posted in Grains

Pre-harvest Corn Disease Scouting Observations

Scouting reports across Kentucky this week have indicated that farmers need to be aware of stalk rots and ear rots as they prepare for and begin corn harvest. Pockets of fields scouted across the state have stalk rot issues that

Posted in Grains

Spotted Corn Leaves: Disease or Something Different?

Over the past few weeks, there have been increased reports of spotting on corn leaves across the state. Symptoms include tiny tan to brown spots with a darker brown margin (Figure 1). These spots can be just a few spots

Posted in Grains