Blog Archives

Presence of Soybean Podworm Seen on Maturing Soybeans

Description of Insect & Damage Although some soybean fields have already been harvested, there are still fields with some maturing pods, and other double crop fields have developing pods. Although not reported in commercial fields this year, the soybean podworm

Posted in Grains

Tar Spot on Corn Confirmed In 2022

Tar spot on corn was confirmed by the University of Kentucky Plant Disease Diagnostic Laboratory (PDDL) from samples collected in Lincoln County. This is our first confirmation of tar spot for 2022, after finding it in Ohio and Todd counties

Posted in Grains

The Best Management of Fusarium Head Blight of Wheat Starts with the Selection of Varieties with Resistance

The most consistent, problematic disease of wheat in Kentucky and the surrounding region is Fusarium head blight (FHB; also known as scab), caused by the fungus Fusarium graminearum (Figure 1).  This disease can cause reduced grain yield, test weight, and

Posted in Grains

A New Pest for Soybeans Reported in Minnesota and Quebec, the Leafminer Macrosaccus morrisella

Reports in Soybean & Mine Description In Québec (Canada), white-colored blotch-type leaf mines have been observed in soybean fields since August 2016, whereas, in Minnesota (United States), leaf mines similar to those in Québec were observed in soybean fields in

Posted in Grains

Potential for Lodged Corn in 2022

Scouting reports across Kentucky have indicated that farmers need to be aware of potential lodging issues as corn harvest gets underway. Pockets of fields scouted across the state show pre-harvest lodging and/or stalk strength tests have indicated a high potential

Posted in Grains

Calculator for Stored Grain Capacity, Bin Sub-floor Volume and Wall and Grain Surface Areas

As corn and soybean harvests approach, stored grain managers on farms, elevators, and warehouses are preparing different types of structures for service. This may include applying approved insecticides or grain protectants to guard against damage caused by insects during storage.

Posted in Grains

Sap Beetles, Opportunistic Secondary Pests on Field Corn

Problem and Damage During the last week of August, I received a corn sample that had an infestation of whitish colored larvae on the ears. These larvae were feeding on the ears and making holes into intact kernels, as shown

Posted in Grains

Deer, Slugs, Voles, Blister Beetles, and What Else Is Damaging Soybeans?

Description of the Problem Last Thursday (9/1/22), I received a series of pictures showing a soybean field with small plants, and blank patches, plants with stems severed by apparent feeding by deer, and stripped blister beetles feeding on the leaves

Posted in Grains

Sugarcane Aphid in Kentucky Sorghum

The sugarcane aphid (SCA) was reported in Kentucky last week in Woodford County on sweet sorghum. This invasive pest can cause up to 100% crop loss if left untreated on grain, forage, and sweet sorghum. SCA cannot survive Kentucky winters

Posted in Forages, Grains

Interveinal Chlorosis Symptoms on Soybean Leaves

Symptoms of soybean leaves with interveinal chlorosis and interveinal necrosis have been observed in several fields across Kentucky recently. Interveinal chlorosis/necrosis is when the leaf tissue between the main leaf veins turns chlorotic (yellow) or necrotic (brown/dead), but the main

Posted in Grains

Status of Insect Pests in Soybeans and Corn in August

I had believed that major pest insect populations could increase after the rains that occurred during the last week of July and first weeks of August 2022; however, major pest insects have remained at very low numbers. The drought during

Posted in Grains

Snails Captured while Conducting Net Sweeps for Insects in Soybeans

Usually, 180-degree net sweeps are conducted to tally the presence of some insects in the field. Sometimes these sweep-nets capture frogs, lizard, or any other organism that is not the main target of this procedure. This is a report of

Posted in Grains

Searching for Parasitoids of Kudzu Bug Egg in Kentucky: Year 2

Origin, Damage & Natural Enemies The kudzu bug, Megacopta cribraria (Hemiptera: Plataspidae), is an invasive insect pest of legumes (Fabaceae) in the southeastern United States, including Kentucky. Kudzu bug originated from Asia and was first detected in the U.S. in

Posted in Grains

Presence of Corn Leaf Aphid in Sorghum May Have Caused some Anxiety to Growers

The corn leaf aphid, Rhopalosiphum maidis (Hemiptera: Aphididae) is a native insect and present across the entire United States and in Canada. This insect feeds on corn, sorghum, small grains, and several grasses. Population outbreaks occurred during some years, but

Posted in Grains

Is the Hibiscus Scentless Plant Bug a Pest or a Beneficial Insect to Control Velvetleaf?

Velvetleaf History in the U.S. Among the invasive plants in the United States, the velvetleaf, Abutilon theophrasti, (Figure 1) is perhaps one of the toughest species to eradicate. This plant is known as wild cotton, buttonweed, Indian mallow, butterprint, or

Posted in Grains