Blog Archives

Fire Blight Alert and Risk Map Overview

Apple and pear trees are at bloom or approaching bloom across Kentucky. Infection by the fire blight bacterium occurs during bloom, thus, protectant antibiotics should be applied when risk is high.  Risk for infection can be assessed using the Fire

Posted in Fruit

Last Year’s Small Fruit 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

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Black Knot of Stone Fruit

Black knot is a common, often serious, disease of plums and cherries in Kentucky. Trees in both commercial and residential plantings are susceptible to the disease. Black knot results in knotty growths that, over time, encircle limbs and result in

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Last Year’s Tree Fruit Diseases Equal This Year’s Tree Fruit Disease Risk

Last year’s disease presence can help us evaluate this year’s disease risk. Many pathogens overwinter on infected plant material or as pathogen survival structures. Poor sanitation practices and lack of management can lead to overwintering of many pathogens.  This, thereby,

Posted in Fruit

Fire Blight Alert and Risk Map Overview

Apple and pear trees are at bloom or approaching bloom across Kentucky. Infection by the fire blight bacterium occurs during bloom, thus, protectant antibiotics should be applied when risk is high.  Risk for infection can be assessed using the Fire

Posted in Fruit

Don’t Get Burned by Fire Blight, Disease Management Begins Now

Fire blight is an important disease of apple, crabapple, pear, and flowering pear in Kentucky. Symptoms are often not observed until late spring or early summer; however, initial infections occur at bloom. The pathogen survives winter in dead, dying, and

Posted in Fruit

Fire Blight Alert and Risk Map Overview

Apple and pear trees are approaching bloom. Infection by the fire blight bacterium occurs during bloom, thus, protectant antibiotics should be applied when risk is high. Risk for infection can be assessed using the Fire Blight Disease Prediction Model. Growers

Posted in Fruit

Apple Production Practices and Pest Management

During the past 10 years, orchard practices in Kentucky have changed dramatically. Many of these practices contributed to conditions conducive for diseases and pests. Growers began to shift from traditional plant spacing to high density plantings, increasing tree stress and

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Apple Diseases

Kentucky apple growers are faced with numerous plant disease issues throughout growing seasons. These diseases limit grower profits by reducing yield and increasing input costs. Diseases of Greatest Concern to Growers While diseases of concern may vary from orchard to

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Fruit, Orchard, and Vineyard Sanitation: Cleaning Up Today May Keep Disease Away

Autumn has arrived in Kentucky, and it is time to focus on fruit, orchard, and vineyard sanitation. Good sanitation practices can help reduce disease-causing pathogens.  Good sanitation practices can help reduce disease-causing pathogens.  These organisms can survive for months or

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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

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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

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

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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

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

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