Blog Archives

Root-knot Nematode in Vegetable Cropping Systems (PPFS-VG-28; CCD-FS-22)

Root-knot nematodes are microscopic plant parasitic roundworms that reside in soil and infect plant roots.  Unmanaged populations can result in significant economic losses for growers due to decreased plant vigor and yield, followed by plant death.  Root-knot nematodes can infect

Posted in Featured Pubs & Videos

Crazy Top of Corn (PPFS-AG-C-12)

Crazy top of corn is a disease that has been observed more frequently in Kentucky due to heavy and intense spring rains. Although some crazy top symptoms are distinct, other symptoms of this disease may not be as familiar and

Posted in Featured Pubs & Videos

Septoria Leaf Spot of Field Hemp (PPFS-AG-H-01)

Septoria leaf spot is the most commonly reported leaf spot disease of field-grown hemp in Kentucky. This fungal leaf disease can rapidly spread throughout fields during periods of extensive rain or high humidity. Under extreme conditions, plants can lose 50%

Posted in Featured Pubs & Videos

Bacterial Canker & Perennial Canker of Stone Fruit (PPFS-FR-T-08)

Perennial canker (also called Cytospora canker, Leucostoma canker, Valsa canker, and peach canker) and bacterial canker are the most common branch and trunk diseases occurring on stone fruit in Kentucky.  Both diseases are stress-related, targeting injured or unhealthy trees.  Dieback

Posted in Featured Pubs & Videos

Bacterial Spot of Pepper & Tomato (PPFS-VG-17)

Bacterial spot affects tomato and pepper crops in both commercial fields and residential gardens, as well as in transplant production. This disease results in poor fruit set, fruit blemishes, and defoliation. Once introduced into a planting, bacterial spot is difficult

Posted in Featured Pubs & Videos

Cucurbit Downy Mildew in Kentucky (PPFS-VG-27)

Cucurbit downy mildew is the most economically important disease of cucurbits in Kentucky. All cucurbits, including cucumber, cantaloupe, summer and winter squashes, pumpkin, and watermelon are susceptible to downy mildew. This foliar disease can affect homegrown cucurbits, as well as

Posted in Featured Pubs & Videos

Boxwood Blight (PPFS-OR-W-20)

Boxwood blight causes rapid defoliation and plant dieback of boxwood (Buxus spp.) and other susceptible hosts within the boxwood family (e.g. Pachysandra and Sarcococa spp.). Infected plants are eventually weakened, and the resulting plant stress and consequent colonization by secondary

Posted in Featured Pubs & Videos

Apple Rust Diseases (PPFS-FR-T-05)

Cedar-apple, cedar-quince, and cedar-hawthorn rusts commonly occur on apple, as well as pear and several ornamentals in the rose family.  These rust diseases can result in economic losses in orchards and can seriously impact landscape plantings in Kentucky. This Extension

Posted in Featured Pubs & Videos

Volutella Blight of Boxwood (PPFS-OR-W-26)

Volutella blight (also called Pseudonectria canker) is the most common disease of boxwood in Kentucky landscapes and nurseries.   This disease is caused by an opportunistic fungal pathogen that attacks leaves and stems of damaged or stressed plants. This Plant Pathology

Posted in Featured Pubs & Videos

Early Blight & Septoria Leaf Spot of Tomato – Disease Management for Residential Growers (PPFS-VG-26)

Early blight and Septoria leaf spot are the most common fungal diseases of tomato in Kentucky gardens. Both diseases affect leaves when weather becomes warm and wet, often beginning in early summer and extending through the season. Frequently occurring together,

Posted in Featured Pubs & Videos

Frogeye Leaf Spot & Black Rot of Apple (PPFS-FR-T-03)

Black rot and frogeye leaf spot are common names of an apple disease that occurs in three phases: (1) leaf infections result in frogeye leaf spot, while (2) fruit rot and (3) branch infections are referred to as black rot.

Posted in Featured Pubs & Videos

Common Problems of Common Annuals & Perennials (PPFS-OR-H-11)

Annual and perennial ornamentals are important aspects of residential and commercial landscapes. However, these plants may experience a wide range of issues, including diseases, insects, and abiotic disorders. The most frequently observed problems of herbaceous ornamentals commonly grown in Kentucky

Posted in Featured Pubs & Videos

The Basics of Biofumigation (CCD-FS-20)

With their typically broad host ranges, soilborne pathogens and plant-parasitic nematodes can be especially difficult to manage once they become established in soils. Biofumigants can be an option for disrupting disease and nematode life cycles and are especially beneficial when

Posted in Featured Pubs & Videos

Common Problems of Common Trees (PPFS-OR-W-30) & Common Problems of Common Shrubs (PPFS-OR-W-31)

Trees and shrubs are important aspects of landscapes and woodlands. However, these woody ornamentals may experience a wide range of issues, including diseases, insects, and abiotic disorders. The most frequently observed problems of trees and shrubs commonly growing in Kentucky

Posted in Featured Pubs & Videos

Black Root Rot of Ornamentals (PPFS-OR-03)

Black root rot can affect a wide range of ornamentals in residential and commercial landscapes, nurseries, and greenhouses. In Kentucky, this disease is commonly observed on Japanese and blue hollies, inkberry, pansy, petunia, and vinca. In addition to ornamentals, numerous

Posted in Featured Pubs & Videos