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.

32 Results

List Grid

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
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 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 Articles
Informational table showing pesticide application amounts on fruit. More
Home Gardening: Stony Pit
Home Gardening: Stony Pit - Articles Articles
Stony pit of pear is presumed to be caused by a destructive virus, but the virus has not been isolated. 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
Source: A Jones.
Pear Disease - Pear Leaf Spot Fungus - Articles Articles
The pear leaf spot fungus, Mycosphaerella pyri, infects the leaves of pear, quince, and occasionally apple trees. Numerous leaf spots can produce defoliation. More
Plant Quality in Home Fruit Plantings
Plant Quality in Home Fruit Plantings - Articles Articles
Purchase well-grown, heavily rooted, one-year-old plants of all fruits except blueberries and brambles. Two-year-old blueberry plants are recommended. More
Pests and Pesticides in Home Fruit Plantings
Pests and Pesticides in Home Fruit Plantings - Articles Articles
Can fruit crops be grown in the home garden without pesticides? The answer is yes, but fruit quantity and quality may decrease. More
Sooty Mold of Pears in the Home Fruit Planting
Sooty Mold of Pears in the Home Fruit Planting - Articles Articles
Sooty mold fungi of the genus Capnodium cause an unsightly blackening over the surface of fruit and leaves. Sooty mold attacks many plants and is most common on pear. More
E. Levine, The Ohio State University, Bugwood.org
Plum Curculio in the Home Fruit Planting - Articles Articles
Climatic irregularities govern the activities of the plum curculio, Conotrachelus nenuphar, a pest injurious to pome and stone fruits throughout the state. More
Pear Scab in the Home Fruit Planting
Pear Scab in the Home Fruit Planting - Articles Articles
Although it is not particularly common, pear scab is very destructive when it does occur. More
Pear Leaf Spot in the Home Fruit Planting
Pear Leaf Spot in the Home Fruit Planting - Articles Articles
The pear leaf spot fungus, Mycosphaerella pyri, infects the leaves of pear, quince, and occasionally apple trees. Numerous leaf spots can produce defoliation. More
Nectria Twig Blight of Apple in the Home Fruit Planting
Nectria Twig Blight of Apple in the Home Fruit Planting - Articles Articles
Nectria twig blight, caused by the fungus Nectria cinnabarina, is a minor disease that breaks out occasionally. More
Pear Disease - Stony Pit
Pear Disease - Stony Pit - Articles Articles

Pear Disease - Stony Pit

Kari A. Peter, Ph.D.

Stony pit of pear is presumed to be caused by a destructive virus, but the virus has not been isolated. Affected fruit are unsightly and unmarketable. More
Photo by K. Peter.
Pear Disease - Sooty Mold - Articles Articles

Pear Disease - Sooty Mold

Kari A. Peter, Ph.D.

Sooty mold fungi of the genus Capnodium cause an unsightly blackening over the surface of fruit and leaves. More
Penn State Department of Plant Pathology & Environmental Microbiology Archives, Penn State, Bugwood.org
Fire Blight in Home Apple and Pear Orchards - Articles Articles
Fire blight is destructive to apple and quince trees and is the most serious pear disease in the eastern United States. More
John Hartman, University of Kentucky, Bugwood.org
Home Orchards: Fire Blight Management in Apples and Pears - Articles Articles
Temperatures just before and during bloom will determine if fire blight becomes serious in early spring. More
Penn State Department of Plant Pathology & Environmental Microbiology Archives, Penn State, Bugwood.org
Fire Blight in Home Orchards - Articles Articles
Fire blight overwinters in cankers on branches and trunks. When the temperature reaches about 65°F, bacteria begin to multiply and appear on the outsides of the cankers as clear amber ooze. More
Leaf and Fruit Spot of Pear in Home Gardens
Leaf and Fruit Spot of Pear in Home Gardens - Articles Articles
Leaf blight and fruit spot are caused by the fungus Fabraea maculata, which infects the leaves, fruit, and shoots of pear and quince and the leaves of apple trees. More
Source: Howard F. Schwartz, Colorado State University, Bugwood.org
Pear Disease - Pear Scab - Articles Articles
Pear scab resembles apple scab in nearly all respects and is caused by the closely related fungus Venturia pirina. More
Each lesion may have dozens of spots, resulting in extensive defoliation. Photo by K. Peter.
Pear Disease - Leaf Blight and Fruit Spot - Articles Articles
Leaf blight and fruit spot is caused by the fungus Fabraea maculata, which infects the leaves, fruit, and shoots of pear and quince trees and the leaves of apple trees. More
Once established in the wound, the fungus can quickly spread from infected fruit to adjacent healthy fruit during storage. Photo by K. Peter.
Apple and Pear Disease - Gray Mold - Articles Articles

Apple and Pear Disease - Gray Mold

Kari A. Peter, Ph.D.

Gray mold, Botrytis cinerea, is the most important postharvest disease of pears and is second to blue mold in importance to apple. More
Page:
  1. 1
  2. 2