Monthly Archives: May 2016

Yellow Poplar, Sassafras, or Magnolia Are Fine For This Weevil

Yellow poplar weevils, also known as sassafras or magnolia weevils, are small black snout beetles that occasionally damage yellow poplar, sassafras, and magnolia. Adults chew distinctive holes in the leaves that resemble curved rice grains in size and shape (Figure

Posted in Landscape Trees & Shrubs

Featured Publication

Cherry Leaf Spot (PPFS-FR-T-06) Cherry leaf spot occurs on both sweet and sour cherry trees; however, it is considerably more serious on sour cherries. Premature defoliation from cherry leaf spot reduces flower bud set for the next year, weakens trees,

Posted in Featured Pubs & Videos

Plant Disease Diagnostic Lab Highlights

The following plant disease highlights from the University of Kentucky Plant Disease Diagnostic Laboratories represent recent sample submissions from field crops, fruit, vegetables, and ornamentals. Diseases diagnosed on agronomic crops during the past week have included barley yellow dwarf virus

Posted in Plant Disease Diagnostic Lab

2016 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

The Dark Side of Black Root Rot

Recent rainy weather in Kentucky has favored black root rot disease development. 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

Posted in Landscape Trees & Shrubs, Nursery Crops, Ornamentals

Preliminary 2016 Report on Ambrosia Beetle in Western Kentucky

Ambrosia Beetle Complex Ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) represent a large number of native and exotic species that live in association with Ambrosia fungi. Ambrosia fungi digest wood and provide nourishment to adult beetles and larvae. The beetles are the

Posted in Nursery Crops

Galls Are Appearing

Insect galls are plant growths often caused by interactions between plant hormones and growth regulating chemicals produced by some species of wasps, flies, or mites. Galls provide their inhabitants with needed nutrients, proper environment, and protection. They may occur on

Posted in Forest Trees, Landscape Trees & Shrubs

Paper Wasps – Watch for “Eaves of Construction”*

Having survived the winter in protected sites, fertile female paper wasps are beginning to construct their familiar open-faced nests. Eaves and other protected sites on and around structures provide ideal sites, and the resources they need are often nearby (Figures

Posted in Human Pests

Featured Publication

Considerations for Diagnosis of Ornamentals in the Landscape (PPFS-GEN-15) Diagnosing landscape plant problems can be challenging. However, an assessment of the entire growing site may aid in the diagnostic process. This publication was designed to provide a starting point for

Posted in Featured Pubs & Videos

Plant Disease Diagnostic Lab Highlights

The following plant disease highlights from the University of Kentucky Plant Disease Diagnostic Laboratories represent recent sample submissions from field crops, fruit, vegetables, and ornamentals. Diseases diagnosed on agronomic crops during the past week have included tan spot and leaf

Posted in Plant Disease Diagnostic Lab

2016 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

New Cereal Aphid (Sipha maydis) Expands Range of Distribution

Current Range Recent information called my attention to the geographic expansion of an invasive pest affecting grasses and cereals. This new pest is the old world aphid Sipha maydis (Hemiptera: Aphididae). The first report on S. maydis came from John

Posted in Grains

Tobacco Diseases to Scout for: Blue Mold and Target Spot

Two diseases should be at the top of tobacco transplant growers’ minds as setting time approaches: blue mold and target spot. Early identification and management of blue mold and target spot will not only reduce losses on the farm, but

Posted in Tobacco

Orange Rust:  Non-Curable Disease in Brambles

Orange rust of brambles (blackberry and raspberries) is beginning to produce spores across Kentucky. Symptoms are often noticed in early spring when newly formed shoots appear weak and spindly. Once infected, the pathogen spreads throughout the entire plant. While orange

Posted in Fruit

Eastern Tent Caterpillars Up in 2016

Kentucky’s eastern tent caterpillar population has been growing steadily over the past few years. However, the trend appears to have accelerated; tents and defoliated cherry trees were very noticeable this spring (Figure 1). Many of the hairy caterpillars have left

Posted in Forest Trees, Landscape Trees & Shrubs