Blossom End Rot

Ann Joy and Brian Hudelson, UW-Madison Plant Pathology Revised:  4/1/2005 Item number:  XHT1140 What is blossom end rot? Blossom end rot is a physiological disorder of tomato in which the tissue of the blossom end of the fruit (the portion of the fruit opposite the stem) breaks down and rots, thus reducing yield.  Pepper, eggplant […]

Downy Mildew

Jim Olis* and Brian Hudelson, UW-Madison Plant Pathology *Completed as partial fulfillment of the requirements for a BS in Plant Pathology at the University of Wisconsin Madison. Revised:  8/6/2012 Item number:  XHT1077 What is downy mildew? The downy mildews are a group of fungal diseases that cause destruction of the leaves, stems, flowers and fruits […]

Late Blight

Amanda Gevens, Anna Seidl, Brian Hudelson, UW-Madison Plant Pathology Revised:  June 16, 2017 Item number:  XHT1195 What is late blight?  Late blight is a destructive disease of tomatoes and potatoes that can kill mature plants, and make tomato fruits and potato tubers inedible.  This disease also affects, although typically to a lesser extent, eggplants and […]

Sampling Garden Soils and Turf Areas for Testing

John Peters, Doug Soldat Revised:  5/11/2010 Item number:  A2166 Save money and protect the environment by having your soil tested before applying lime and fertilizer. This concise publication tells you when and how to sample and where to send it for testing (2 pages; 2008). Download Article

Herbicide Damage

Brian Hudelson, UW-Madison Plant Pathology Revised:  5/11/2010 Item number:  XHT1004 What is herbicide damage?  Herbicide damage is any adverse, undesired effect on a plant that is caused by exposure of that plant to a pesticide designed for weed control (i.e., a herbicide).  Any plant can be subject to this problem.   What does herbicide damage […]

Gray Mold (Botrytis Blight)

Jeffory Schraufnagel*, Milwaukee Area Technical College, Brian Hudelson, UW-Madison Plant Pathology Revised:  5/11/2010 Item number:  XHT1122 What is gray mold?  Gray mold (or Botrytis blight) is a common and often serious fungal disease that can affect plants of all kinds.  Gray mold is a particularly serious problem on flowering plants and those plants grown in […]

Chlorosis

Brian Hudelson, UW-Madison Plant Pathology, UW-Extension Revised:  1/8/2012 Item number:  XHT1002 What is chlorosis?  Chlorosis is a common nutritional disorder of many woody ornamentals in Wisconsin, particularly in the southern and eastern parts of the state.  Pin oaks are most commonly affected by chlorosis, although many other trees and shrubs (e.g., white oak, red maple, […]

Container Gardening

Live in an apartment or condo? You can still raise a garden’s worth of flowers or vegetables in pots and other containers by mastering these methods.

Black Walnut Toxicity

Ann Joy and Brian Hudelson, UW-Madison Plant Pathology Revised:  5/7/2010 Item number:  XHT1017 What is black walnut toxicity? Black walnut trees (Juglans nigra) produce a toxic substance (called juglone) that prevents many plants from growing under or near them. Related trees like butternut (J. cinerea) and shagbark hickory (Carya ovata) also produce juglone, but in […]

Aster Yellows

Brian Hudelson, UW-Madison Plant Pathology Revised:  5/6/2010 Item number:  XHT1080 What is aster yellows? Aster yellows is a chronic, systemic disease that affects over 300 species in 38 families of broad-leaf, herbaceous plants. Members of the aster family (Asteraceae), such as asters, marigolds, Coreopsis and purple coneflower are commonly affected by this disease. Vegetable crops […]

Using Cover Crops and Green Manures in the Home Vegetable Garden

Doug Higgins and Kristin Krokowski, UW-Extension Waukesha County, and Erin Silva, UW-Agronomy Revised:  5/13/2012 Item number:  XHT1209 What are cover crops and green manures?  Cover crops are plants grown in a garden to improve a soil’s physical structure and fertility.  As cover crops grow, they become reservoirs for important plant nutrients such as nitrogen, phosphorus […]

Damping Off

Brian Hudelson, UW-Madison Plant Pathology Revised:  4/25/2004 Item number:  XHT1124 What is damping-off?  Damping-off is a common and fatal disease that affects all types of plant seedlings.  The disease is most prevalent when seeds are germinated in cool, wet soils.  Fortunately, seedlings are susceptible to damping-off for only a short period following emergence and eventually […]

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