Resources for Garden Plant Diseases

Title Available As Summary Date ID Author
Diagnosing Plant Problems Nov 6, 2018 426-714
Plant Disease Diagnostic Form
Plant Disease Diagnostic Form
May 13, 2016 450-097 (ENTO-198NP)
Pest Management Guide: Home Grounds and Animals, 2019
This 2019 Virginia Pest Management Guide provides the latest recommendations for controlling diseases, insects, and weeds for home grounds and animals. The chemical controls in this guide are based on the latest pesticide label information at the time of writing. Because pesticide labels change, read the label directions carefully before buying and using any pesticide. Regardless of the information provided here, always follow the latest product label instructions when using any pesticide.
Jan 18, 2019 456-018 (ENTO-289P)
Late Blight of Tomato and Potato Nov 20, 2018 ANR-6 (SPES-72P)
Insect and Mite Pests of Boxwood
Three pests, the boxwood leafminer, mite and psyllid commonly attack American and English boxwood in Virginia and cause spotting, yellowing, and puckering of leaves.
Apr 3, 2019 ENTO-42NP (ENTO-314NP)
Food Safety For School and Community Gardens: A Handbook for Beginning and Veteran Garden Organizers
Creating and maintaining community and school gardens has been identified as an effective strategy to increase healthy food awareness and consumption. Unfortunately, fresh fruits and vegetables have been linked to more than 450 outbreaks of foodborne illness in the U.S. since 1990. In commercial food production, employing a set of risk-reduction steps — known as good agricultural practices (GAPs) — has been pointed to by the U.S. Food and Drug Administration as the best prevention against foodborne, illness-causing pathogens.
May 29, 2013 FST-60P (FST-296)
Integrated Pest Management for Plant Diseases in the Home Garden and Landscape, Learning Module I: Integrated Pest Management Apr 22, 2015 PPWS-14NP
Integrated Pest Management for Plant Diseases in the Home Garden and Landscape, Learning Module II: The Plant Disease Triangle Apr 22, 2015 PPWS-15NP
Mortality of Great Rhododendron (Rhododendron maximum) in Virginia
Since 2015, Extension specialists from Virginia Tech (VT) have visited and collected plant and soil samples from several large areas of dying great rhododendron (Rhododendron maximum) in Virginia’s mountainous regions. In 2016 VT specialists met with Virginia Department of Forestry, US Forest Service personnel, and other experts to revisit some of these sites. No consistent cause of this mortality has yet been identified. It is possible that a variety of factors are stressing the rhododendrons in these areas to a point where opportunistic pathogens or insects can successfully attack and kill them. The following information summarizes our observations and diagnostic results from four separate great rhododendron mortality sites in Virginia. This information is not equivalent to a research study, which would also include samples taken from healthy great rhododendron for comparison; however, we are confident that we have ruled out two diseases that are frequently mentioned both online and anecdotally as a cause of this mortality, specifically Phytophthora root rot and Botryosphaeria dieback.
Aug 21, 2019 SPES-151P