Blog Archives

The White Marginated Burrower Bug in Soybeans is a Harmless Insect

During soybean field scouting, a small black insect can be observed in relative abundance in 2021. This insect is known as the white-margined burrower bug, Sehirus cinctus (Hemiptera: Cydnidae) (Figure 1). This insect is not a pest of soybeans but

Posted in Grains

Controlling Slugs Through the Application of Potash and Molluscicides

Slugs, a pest once found in homeowner’s gardens and greenhouses, have quickly become a problem in crop fields. Slugs belong to the gastropod family, which includes slugs and snails. Slugs have a unique biology because they have both male and

Posted in Grains

Abrupt Presence of Fall Armyworms in Double-Crop Soybeans in Kentucky

The larval stage of the fall armyworm (FAW), Spodoptera frugiperda (Lepidoptera: Noctuidae) is a voracious defoliator of many plant species. The FAW is a native pest of the New World; however, it overwinters in south Florida or in the southernmost

Posted in Grains

The Kudzu Bug and The Search for Its Parasitoids

The kudzu bug, Megacopta cribraria (Hemiptera: Plataspidae) (Figure 1), is a shield bug that is native to Asia. This insect receives its name because its main host plant is kudzu, Pueraria montana (Fabaceae). However, kudzu bugs also feed on soybeans

Posted in Grains

Spider Mites Damage Observed in Soybeans in Western Kentucky

The two-spotted spider mite (Tetranychus urticae) is probably one the most polyphagous pests in the world. Two-spotted spider mites feed on leaves, stems, and fruit of many plant species by piercing cells and sucking out cell contents. This injury causes

Posted in Grains

Managing Southern Rust in Corn

Southern rust of corn, caused by the fungus Puccinia polysora, was confirmed in Kentucky on July 12, in Union County. The disease was at very low incidence and severity; however with our current weather conducive for disease development, it will

Posted in Grains

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

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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