Blog Archives

Landscape Sanitation: Clean Up for Clean Plants

Autumn has arrived in Kentucky and, as leaves will soon begin to change color and fall from trees, it is time to focus on landscape sanitation. Good sanitation practices can help reduce disease-causing pathogens.  These organisms can survive for months

Posted in Landscape Trees & Shrubs, Landscapes, Ornamentals

Soil-borne Pathogens Serve as the Biggest Threat to Mum Production in Kentucky

Many Kentucky vegetable and greenhouse producers are beginning to include fall chrysanthemum production in their operations.  Mums are usually planted in June and sold in September when fall color is in demand.  In Kentucky, mum production can vary in size,

Posted in Ornamentals

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

Rainy Season Equals Phytophthora Disease in Ornamentals

Spring rains can create growing conditions that are devastating to most landscape plants.  Wet soils are favored by a group of pathogens called water molds, or oomycetes, which cause a range of root and stem diseases. Water molds are found in

Posted in Landscape Trees & Shrubs, Ornamentals

Last Year’s Ornamental Diseases Equal This Year’s Disease Risk

Disease presence last year can indicate a risk for the same disease this year. Many pathogens overwinter on infected plant material or as pathogen survival structures. Poor sanitation practices can lead to an increased risk of these diseases in the

Posted in Ornamentals

How Poinsettia Diseases Can Ruin the Holiday

Poinsettia are holiday decorations in public and personal spaces. No holiday décor is complete without at least one. However, numerous plant diseases can act as a Grinch to steal holiday cheer. Proper plant selection and maintenance are important for a

Posted in Ornamentals

Last Year’s Ornamental Diseases Equal This Year’s Disease Risk

Disease presence last year can indicate a risk for the same disease this year. Many pathogens overwinter in Kentucky on infected plant material or as pathogen survival structures. Poor sanitation practices can lead to an increased risk of these diseases

Posted in Landscape Trees & Shrubs, Ornamentals

A Great Spring for Aphids

This long spring is ideal for aphids. Colonies of the small sap-feeders (Figure 1) can be found on many landscape plants now. Impacts of aphids vary widely. Some species manage to remove sap without any obvious effect on plants. However,

Posted in Landscape Trees & Shrubs, Ornamentals

“Wet Feet” of Ornamentals

“Wet feet” is the common term for a condition that affects plant species intolerant of wet growing conditions. This problem occurs when soils become saturated with water, which ultimately causes roots to suffocate. Once root damage occurs, plants decline and

Posted in Landscape Trees & Shrubs, Ornamentals

Houseplant Insect and Mite Control

Many houseplants enjoy time outdoors during summer. However, it’s a tough world out there and more than a few plants develop insect or mite infestations while they are basking in the summer sun. A few weeks indoors can allow pests

Posted in Ornamentals

Spider Mite Problems

The two-spotted spider mite is the most common and destructive mite on deciduous ornamentals. It feeds on many varieties of trees, shrubs, flowers, weeds, fruits, and garden crops. Immature stages and adults are yellow to green with two dark spots

Posted in Landscape Trees & Shrubs, Ornamentals

Alternatives for Japanese beetle control

Japanese beetle numbers appear to be up in many areas, and landscapes with plants these insects prefer could be under siege for the next 2 to 3 weeks. Turf and ornamental insecticides containing pyrethroids (bifenthrin, cyfluthrin, cypermethrin, permethrin, etc.) can

Posted in Landscape Trees & Shrubs, Ornamentals

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

Mild Winter, Good Spring for Slugs

Slugs should have survived our mild winter without a problem, and our early spring temperatures and rainfall pattern are ideal for them. Slugs use their rasping mouthparts to tear tissue from leaves, stems, and flowers. New transplants and small seedlings

Posted in Lawn & Turf, Ornamentals

Landscape Sanitation: Clean Up for Clean Plants

Autumn has arrived in Kentucky and, as leaves change color and fall from trees, it is time to focus on landscape sanitation. Good sanitation practices can help reduce disease-causing pathogens.  These organisms can survive for months or years on dead

Posted in Landscape Trees & Shrubs, Ornamentals