Monthly Archives: June 2015

Welcome to Dr. Carl Bradley

The University of Kentucky’s Extension Plant Pathology Team wishes to extend our warmest welcome to Dr. Carl Bradley.  Dr. Bradley begins his tenure as an Extension Specialist in Plant Pathology effective July 1, 2015.  He will be based at the

Posted in Announcements

Emerald Ash Borer Found In Madison and Mercer Counties

Joe Collins, Senior Nursery Inspector in the Office of the State Entomologist, captured an emerald ash borer (EAB) in a trap placed at Fort Boonesboro; this is the first discovery of this insect in Madison County. Jessica Cole, Mercer County

Posted in Forest Trees, Landscape Trees & Shrubs

Nightmare On Oak Street

Oak Leaf Skeletonizer A leaf attacked by oak leaf skeletonizer (OLS) caterpillars is reduced to a veiny skeleton held in place by thin tissue of the upper leaf surface (Figure 1). Skull-like empty head capsules littering the lower leaf surface

Posted in Landscape Trees & Shrubs

It’s In the Bag

Small bagworms are feeding now. It takes careful inspection to detect small larvae wrapped in silk bags with pieces of leaf attached (Figure 1). Check small trees and shrubs that have a history of problems to see if the insects

Posted in Landscape Trees & Shrubs

Nest-Building Caterpillars

The ugly nest caterpillar, which is yellow-green with a dark head, is most commonly found on chokecherry and black cherry, but they will feed on other hardwood trees and some shrubs. These caterpillars spin dense, unsightly silk tents (Figure 1)

Posted in Landscape Trees & Shrubs

Dogwood Sawflies

As with many plant-feeding insects, the dogwood sawfly is one of those pests that rarely draws much attention but occasionally can be very destructive. A report of damage early this week provides a good opportunity to review this interesting and

Posted in Landscape Trees & Shrubs

Night Light Beetles

Masked chafer adults (Figure 1) are among the many night-flying insects attracted to lights. Large numbers can accumulate around windows and outdoor lights, or be seen hovering over the turf after dark. While similar to May beetles, Japanese beetles, and

Posted in Lawn & Turf

Reminder: Endosulfan Phase-out and Cancellation

One of the last organochlorine insecticides, endosulfan, has been undergoing a cancellation and phase-out over the past several years.  This phase-out/cancellation will be complete by July 31, 2016. Many growers are familiar with this product under its former names of

Posted in Pesticide Topics

Featured Publication

Fundamental Principles of Plant Pathology for Agricultural Producers (PPA-41) All crops produced in Kentucky have the potential to become diseased under the right conditions.  A plant is diseased when it is affected by some agent that interferes with its normal

Posted in Featured Pubs & Videos

2015 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

Watch for Northern Corn Leaf Blight

Iowa State University plant pathologist Dr. Alison Robertson is reporting the early occurrence of northern leaf blight of corn in Iowa (Diseases Showing Up in Iowa Corn).  On susceptible hybrids, this disease produces cigar-shaped lesions (Figures 1 & 2). Further

Posted in Grains

Hornworms Are Active

Hornworms are active now and can be found feeding on solanaceous plants (tomatoes, potatoes, tobacco).  This is the first of two generations that normally occur each year in Kentucky. While the first generation is usually much smaller than the second,

Posted in Tobacco, Vegetables

Colorado Potato Beetle Management

Colorado potato beetles (Figure 1) are a challenge. Their ability to breakdown chemicals results in rapid development of resistance to insecticides.  It can take some trial and error to find products that will control this insect. Finding an effective tool

Posted in Vegetables

Emerald Ash Borer Discovered in Harlan County

An emerald ash borer (EAB) adult was captured in a trap near Cumberland, KY; this is the first record from Harlan County in eastern Kentucky. Adults (Figure 1), which live from 3 to 6 weeks, can be active from late

Posted in Forest Trees, Landscape Trees & Shrubs

Yellow Poplar Weevil

Yellow poplar weevils, also known as sassafras or magnolia weevils, are small black beetles that damage yellow poplar, sassafras, and magnolia. A distinct snout projecting from the front of the head occasionally causes them to be mistaken for ticks. Feeding

Posted in Landscape Trees & Shrubs