Blog Archives

Sooty Blotch & Flyspeck Make for Ugly Apples

The time for apple harvest in Kentucky has arrived, bringing with it the possibility of less than perfect looking apples. Sooty blotch and/or flyspeck are one of many causes for blemished, ugly apples. The two fungal diseases occur together as

Posted in Fruit

The Rotten Truth about Bitter Rot

While fruit rots have a variety of causes, the most common fungal fruit rot of apple in Kentucky is bitter rot. The disease results in rotten, inedible fruit. Fungicides are available for management; however, sanitation is critical for disease prevention.

Posted in Fruit

Apple Scout Website

The publication An IPM Scouting Guide for Common Problems of Apple in Kentucky was first introduced in 2014 as an online/paper version. In order to improve access to this important scouting guide, a mobile website was developed. The Apple Scout

Posted in Fruit

Apple Bitter Rot Season is Upon Us

While fruit rots have a variety of causes, the most common fungal fruit rot of apple in Kentucky is bitter rot. The disease results in rotten, inedible fruit. Fungicides are available for management; however, sanitation is critical for disease prevention.

Posted in Fruit

Grape Scout Website

The publication “An IPM Scouting Guide for Common Problems of Grape in Kentucky” was first introduced in 2019 as an online/paper version. In order to improve access to this important scouting guide, a mobile website was developed. The Grape Scout

Posted in Fruit

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

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

Orange Rust:  Non-Curable Disease in Brambles

Orange rust of brambles can be a concern for Kentucky blackberry and raspberry growers. The first symptoms are often noticed in early spring when newly formed shoots appear weak and spindly. Once infected, the pathogen spreads throughout the entire plant.

Posted in Fruit

Bramble Scout Website

The publication An IPM Scouting Guide for Common Problems of Brambles in Kentucky was first introduced in 2018 as an online/paper version. In order to improve access to this important scouting guide, a mobile website was developed. The Bramble Scout

Posted in Fruit

Assessing and Utilizing UK Extension Resources for Commercial Fruit Production

The University of Kentucky Extension team has put together numerous resources for commercial fruit growers regarding production and pest management. However, many growers are not aware of the wide range of publications, newsletters, websites, and other resources that are available

Posted in Fruit

Phomopsis Twig Blight & Stem Canker of Blueberry

Phomopsis twig blight and stem canker is becoming more common in Kentucky blueberry. Stressed plants are more susceptible to this disease, and reports are often associated with fields that have a history of Phytophthora root rot or severe abiotic disorder

Posted in Fruit

Cherry Leaf Spot

Cherry leaf spot is a fungal disease of sweet, sour, and ornamental cherries. While this leaf disease is rarely a death sentence for trees, it can result in reduced blossoms, weakened trees, and increased risk for winter injury. Cherry Leaf

Posted in Fruit, Landscape Trees & Shrubs

Hanging by a Thread

Dead, curled leaves dangling by fungal “threads” are typical of a disease called thread blight.  This disease is more common in eastern Kentucky, where it has been observed on apple, cherry, and viburnum.  Other potential hosts include cotoneaster, dogwood, gooseberry,

Posted in Fruit, Landscape Trees & Shrubs

Peach Scout Website

The publication An IPM Scouting Guide for Common Problems of Peach in Kentucky was first introduced in 2020 as an online/paper version (ID-260). In addition to the online/paper version, and as a way to improve access to this important scouting

Posted in Fruit

Cedar-Apple Rust

Cedar-apple rust is the most common and economically important rust disease of apple in Kentucky.  The pathogen overwinters as galls on cedar and juniper. Removal of these pathogen sources on cedar can later reduce disease incidence on apple. Once apple

Posted in Fruit