Plant Disease Identification and Control

Information on plant disease identification and control, including rot, freeze damage, rust, blight, mold, scales, bacteria, viruses, fungus, wilt, mildew, gall, mites, moths and cankers. Tips on integrated pest management and herbicide summaries.

78 Results

List Grid

Late season fungicides needed to protect against fruit rot in storage. Photo: K. Peter, Penn State
Apple Disease, Pre- and Post-harvest - Keep Apples Free From Fruit Rot - Articles Articles
Management considerations are discussed for mitigating pome fruit rots before and after harvesting. More
Postharvest fungicide sprays are necessary to prevent defoliation from cherry leaf spot. Photo: K. Peter, Penn State
Getting the Upper Hand on Tree Fruit Diseases in July - News News
Conditions may be optimal for several fungal and bacterial pome and stone fruit diseases in July. More
Dull, olive green areas visible on the undersides of leaves are the first evidence of apple scab.
Tree Fruit Disease - An Apple Scab Review - Articles Articles
Early season apple disease management is primarily directed at controlling scab. More
Be vigilant and scout for apple scab! Photo: K. Peter, Penn State
June Diseases for the Grower Radar - News News
Diseases for the fruit grower radar and their management strategies are discussed as we wrap up May and begin June. More
Protect any trees still in bloom: Fire blight conditions ideal April 29 through May 2. (Photo: K. Peter)
Fire Blight, Apple Scab, Rust, Plus Others: Be On Alert! - News News
Conditions are optimal for fire blight, apple scab, and rust infections. Growers are encouraged to keep trees protected. Other diseases for the fruit grower radar are also discussed. More
Be proactive about fire blight management: Let’s not repeat 2014. (Photo: B. Lehman)
Disease Update: Blossoms Still Open—Fire Blight Risk Continues - News News
Conditions are favorable for fire blight and apple scab. Additional tools for the fire blight management toolbox are discussed. More
Control for fire blight and apple scab is critical during bloom. (Photo: K. Peter)
Disease Update: Watch Out For Diseases during Apple Bloom - News News
Bloom is well underway in parts of PA and MD. Fire blight and scab disease conditions are in full force now. Growers are encouraged to protect trees. More
Dormant copper sprays are encouraged to help keep diseases in check. (Photo: K. Peter)
Disease Management Strategies For The Grower Radar - News News
Consider applying dormant sprays soon to manage fungal and bacterial diseases this season. More
Copper sprays need to be applied prior to bud swell to manage peach leaf curl. (Photo: K. Peter)
Disease Update: Copper Sprays and Orchard Sanitation to Manage Diseases - News News
Depending on your location, the warm weather over the last few weeks may have pushed some fruit trees along. For disease management, consider applying dormant copper and urea sprays soon. More
A declining tree with bark removed from graft union to show necrosis. Note numerous rootstock suckers. (Photo: K. Peter)
Apple Disease - Rapid Apple Decline (RAD) or Sudden Apple Decline (SAD)? - Articles Articles
There is a mystery surrounding rapid apple decline/sudden apple decline of young, dwarf apple trees. More
Moldy core in Red Delicious. (Photo: K. Peter)
Moldy Core Of Apple - News News

Moldy Core Of Apple

01/20/2017

Moldy core is characterized by the growth of fungus mycelium within the apple fruit seed cavity, without penetration into the flesh of the fruit. More
Gerald Holmes, California Polytechnic State University at San Luis Obispo, Bugwood.org
Home Orchards: Table 2.4. Plant Protection Materials - Articles Articles
Informational table showing pesticides available for home garden use on various fruit crops. More
M.G. Klein, USDA Agricultural Research Service, Bugwood.org
Home Orchards: Table 4.4. Disease, Insect, and Mites on Apples and Pears - Articles Articles
Occurrence of diseases, insects, and mites on apples and pears during the growing season. More
Be sure to remove cankers from trees when pruning. (Photo: K. Peter)
More Tree Fruit Disease Management Tips For 2017: Canker Management - News News
Sanitation is the best offense for disease management, especially when it comes to canker removal. More
Home Gardens: Union Necrosis and Decline
Home Gardens: Union Necrosis and Decline - Articles Articles
Apple union necrosis and decline is primarily a problem on trees propagated on MM106 rootstock. More
Home Orchards: Table 4.2. Non-Scab Resistant Apple Varieties
Home Orchards: Table 4.2. Non-Scab Resistant Apple Varieties - Articles Articles
Informational table showing apple varieties that are non-resistant to apple scab but recommended for home planting in Pennsylvania. More
Home Orchards: Table 4.1. Scab-resistant Apple Varieties Home Orchards: Table 4.1. Scab-resistant Apple Varieties - Articles
Informational table showing apple varieties that are resistant to apple scab and recommended for home planting in Pennsylvania. More
Home Orchards: Table 4.9. Pesticide Recommendations for Scab-resistant Apples Home Orchards: Table 4.9. Pesticide Recommendations for Scab-resistant Apples - Articles
The following spray schedule and times might vary by as much as 2 weeks, depending on the region of Pennsylvania in which the trees are located. More
Home Fruit Gardens: Table 1.2. Monthly Maintenance
Home Fruit Gardens: Table 1.2. Monthly Maintenance - Articles Articles
Your schedule may vary from the one below by as much as 2 weeks (earlier or later) depending on the region of Pennsylvania in which you are located. More
Home Orchard: Table 2.3. Pesticide Application Amounts Home Orchard: Table 2.3. Pesticide Application Amounts - Articles
Informational table showing pesticide application amounts on fruit. More
Home Gardening: Mucor Rot
Home Gardening: Mucor Rot - Articles Articles
Mucor rot is a fungal disease of apples and pears. More
Eric Coombs, Oregon Department of Agriculture, Bugwood.org
Crown Gall and Cane Gall in the Home Fruit Planting - Articles Articles
Crown and cane gall are bacterial diseases that seriously limit raspberry production in Pennsylvania. More
Young galls are light in color and with age become dark and hard, ½ inch to 3 or 4 inches in diameter. Photo by B. Butler.
Tree Fruit Disease - Crown Gall - Articles Articles

Tree Fruit Disease - Crown Gall

Kari A. Peter, Ph.D.

Crown gall is caused by a bacterium, Agrobacterium tumefaciens, and affects apples, pears, quince, peaches, nectarines, apricots, plums, and cherries. More
Scab-resistant Apple Varieties for Home Orchards
Scab-resistant Apple Varieties for Home Orchards - Articles Articles
Scab-resistant apple varieties are ideal selections for home fruit production. More
Source: K. Yoder.
Apple Disease - Brooks Fruit Spot - Articles Articles

Apple Disease - Brooks Fruit Spot

Kari A. Peter, Ph.D.

Caused by the fungus Mycosphaerella pomi, Brooks fruit spot is also known as Phoma fruit spot. The disease attacks apple and crabapple trees and is rarely found in well-sprayed orchards. More
Page:
  1. 1
  2. 2
  3. 3
  4. 4