Degree Day Calculation

Karen Delahaut, UW-Madison Fresh Market Vegetable Program Revised:  8/6/2012 Item number:  XHT1086 Indicator plants are not always suitable for the timing of pest management practices.  You may not have the critical indicator plant  nearby to time local activities, or there may not be a good indicator plant for a particular pest’s crucial life stage.  Another […]

Phenology

Karen Delahaut, UW-Madison Fresh Market Vegetable Program Revised:  5/17/2012 Item number:  XHT1085 The word phenology is derived from the Greek word phaino meaning “to show” or “to appear”.  Phenology is a branch of science that studies the relationships between periodic biological events—usually the life cycles of plants and animals—and environmental changes.  Natural events such as […]

Boxwood Blight

Boxwood blight (also known as box blight and boxwood leaf drop) is a devastating disease of boxwood (Buxus spp.) that can cause leaf loss and eventual death of affected shrubs. This factsheet covers symptoms and management.

Phytophthora Root Rot of Christmas Trees

Phytophthora root rot is a common disease of Christmas trees including Douglas-fir, balsam and true firs (e.g., Fraser, balsam and Canaan), spruces, and pines. This fact sheet covers symptoms and management.

Winter Burn

This publication covers winter burn, a common problem of evergreens including those with broad leaves (e.g., boxwood, holly, rhododendron), needles (e.g., fir, hemlock, pine, spruce, yew) and scale-like leaves (e.g., arborvitae, false cypress, juniper) grown in open, unprotected locations and exposed to severe winter conditions.

Woody Ornamentals Pest Management in Wisconsin

Author(s): Chris Williamson, P.J. Liesch, Jim Kerns, Roger Flashinski Woody Ornamentals Pest Management in Wisconsin is an indispensable resource for nursery growers. This completely revised publication identifies pests of trees and shrubs in the state plus the products available for their control. It also notes products that are registered for use by homeowners (56 pages; […]

Scorch and Related Problems in Trees and Shrubs

Author(s): M.F. Heimann, G.L. Worf Scorch, or the browning of leaf edges, affects a wide range of deciduous and evergreen plants throughout Wisconsin, especially ash, linden, maple, oak, pine, and spruce. While scorch is easily recognizable, it’s important to recognize that it is a symptom, not a cause. A number of problems cause symptoms that […]

Root-Knot Nematode

Root-knot nematodes (Meloidogyne spp.) are small, soilborne, worm-like organisms that infect many agricultural and horticultural plants. This publication describes the symptoms, management and control of root-knot nematodes in Wisconsin.

Swiss Needle Cast

Ann Joy and Brian Hudelson, UW-Madison Plant Pathology Revised:  8/13/2012 Item number:  XHT1148 What is Swiss needle cast?  Swiss needle cast is a fungal disease of Douglas-fir.  This tree is native to the Rocky Mountains and the Pacific Coast, but has traditionally been grown in Wisconsin as a landscape ornamental and as a Christmas tree.  […]

Volutella Blight

Gina Muscato and Brian Hudelson, UW-Madison Plant Pathology Revised:  8/13/2012 Item number:  XHT1191 What is Volutella blight?  Volutella blight is a common and potentially lethal disease of Japanese pachysandra (Pachysandra terminalis), an evergreen, semi-woody groundcover that is grown in shade gardens throughout hardiness zones 4 and 5 in Wisconsin.  Volutella blight can severely limit the […]

Weir’s Cushion Rust of Spruces

Glen R. Stanosz, UW Madison Plant Pathology, and Forest Ecology and Management Revised:  8/13/2012 Item number:  XHT1119 What is Weir’s cushion rust? Weir’s cushion rust is a needle disease that disfigures and reduces growth of spruce trees (Picea spp.) of all ages.  This disease has been known in both eastern and western regions of the […]

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