Monthly Archives: June 2021

Downy Mildew of Grape

Downy mildew is an important disease of commercial and backyard grapes in Kentucky. Warm, wet, humid weather conditions favor infection and disease development. When flowers, clusters, and shoots become infected by downy mildew, yield losses result. This disease may also

Posted in Fruit

The Dark Side of Black Root Rot in Ornamentals

Black root rot can affect a wide range of ornamentals in home and commercial landscapes, nurseries, and greenhouses. Black root rot is commonly observed on Japanese and blue hollies, inkberry, pansy, petunia, and vinca. Black Root Rot Facts Symptoms are

Posted in Landscape Trees & Shrubs, Ornamentals

Kentuckians Finding Bloodsucking Conenoses

Human pests Recently, multiple inquiries have come in regarding eastern bloodsucking conenoses found in or near homes. These Kentucky kissing bugs often stir up a lot of negative feelings when they are found, as people fear they may have been

Posted in Human Pests

It’s Chiggers Time!

One of the most annoying pests of the summer is chiggers. Chiggers are the immature stage of a parasitic mite that feeds on other arthropods when it becomes an adult. Chigger bites are often the result of working or spending

Posted in Human Pests

Grape Downy Mildew (video)

Dr. Nicole Gauthier, Plant Pathology Extension Specialist, has created a short video (2:44 minutes) focusing on grape downy mildew.  This video provides information on disease appearance, disease cycle, and management.   Grape Downy Mildew is available online. For additional publications on

Posted in Featured Pubs & Videos

Plant Disease Diagnostic Lab Highlights

The following plant disease highlights have been compiled from samples submitted to the University of Kentucky Plant Disease Diagnostic Laboratories from June 1 to June 29, 2021. Diagnostic samples of agronomic crops have included Rhizoctonia root/crown rot and anthracnose on

Posted in Plant Disease Diagnostic Lab

2021 Insect Trap Counts

Trap counts for major insect pests are provided by the Kentucky IPM Program. Traps are located at the UK Research and Education Center in western Kentucky and the UK Spindletop Farm in Lexington.  Below are trap counts for the current

Posted in Insect Trap Counts

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

Orchard Math 101: An Explanation of Proper Spray Calculations

Calculations for the application of fungicides and insecticides to commercial orchards are often complicated and can be downright confusing. While these mathematical exercises may leave many scratching their heads, they are critical to the success of a spray program. Over-application

Posted in Fruit

Dogwood Powdery Mildew

Dogwood is a popular landscape tree throughout Kentucky. However, once infected with powdery mildew, trees can develop an unattractive appearance. The disease is most prevalent during periods of high humidity and in landscapes with reduced air circulation. Some cultivars are

Posted in Landscape Trees & Shrubs

Soggy Weather means Lots of Millipedes and Fungus Gnats

Recently, we have been seeing a lot of inquiries on two denizens of dampness; fungus gnats and millipedes. While neither of these arthropods are huge problems, they can become curiosities and annoyances when the weather is as wet as it

Posted in Household Pests, Lawn & Turf

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

Diagnosis of “No Disease”

Extension agents and growers may occasionally receive diagnostic reports from the University of Kentucky Plant Disease Diagnostic Laboratory that indicate, “no disease was found.”  This may result from an insufficient sample and/or that the plant problem does not result from

Posted in Plant Disease Diagnostic Lab

Flowering Dogwood Diseases (PPFS-OR-W-06)

The flowering dogwood (Cornus florida) is one of the most popular ornamental trees in Kentucky landscapes. Unfortunately, some common diseases can threaten the health of these beautiful trees in both residential and commercial settings. This publication covers the most common

Posted in Featured Pubs & Videos

2021 Insect Trap Counts

Trap counts for major insect pests are provided by the Kentucky IPM Program. Traps are located at the UK Research and Education Center in western Kentucky and the UK Spindletop Farm in Lexington.  Below are trap counts for the current

Posted in Insect Trap Counts