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.

39 Results

List Grid

Bacterial spot on peach fruit. Photo by S. Bardsley.
Stone Fruit Disease - Bacterial Spot, Refining Disease Management - Articles Articles
Bacterial spot, Xanthomonas arboricola pv. pruni, is a difficult disease to manage. More
Plum Pox Virus
Plum Pox Virus - Videos Videos
Part 3, 6 minutes. 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
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
Black Knot Of Prunus in the Home Landscape
Black Knot Of Prunus in the Home Landscape - Articles Articles
The fungus Plowrightia morbosa (Apiosporina) causes the formation of dark brown to black, long, swollen galls or knots on the branches of most types of cultivated plums, prunes and cherries. More
Plum Pox Virus
Plum Pox Virus - Articles Articles

Plum Pox Virus

Kari A. Peter, Ph.D.

Plum pox virus (PPV), or Sharka, is a viral disease that infects not only plum but other economically important Prunus species. More
Plum Pox Virus on Plum
Plum Pox Virus on Plum - Articles Articles
PPV symptoms on plum. 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
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
Powdery Mildew of Cherry and Plum in Home Fruit Plantings
Powdery Mildew of Cherry and Plum in Home Fruit Plantings - Articles Articles
This disease is caused by Podosphaera clandestina, one of the common species of the powdery mildew group of fungi. More
Plum Pockets in the Home Fruit Planting
Plum Pockets in the Home Fruit Planting - Articles Articles
In the northeastern United States, the most important disease affecting American-type plums is known as plum pockets, or bladder plum. More
Plum Leaf Spot in the Home Fruit Planting
Plum Leaf Spot in the Home Fruit Planting - Articles Articles
Leaf spot of plums and prune-type plums is caused by the fungus Coccomyces prunophorae. The fungus and the disease it causes are very similar to those of cherry leaf spot. 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
Peach Scab in the Home Fruit Planting
Peach Scab in the Home Fruit Planting - Articles Articles
Peach scab appears to affect all cultivars of peach and is known to occur on nectarines, plums and apricots as well. More
Cytospora Canker of Stone Fruits in the Home Fruit Planting
Cytospora Canker of Stone Fruits in the Home Fruit Planting - Articles Articles
Cytospora canker, also known as perennial canker, peach canker, Valsa canker, and Leucostoma canker, can cause trees in young orchards to die. Infected trees in older orchards slowly decline. More
Brown Rot of Stone Fruit in the Home Fruit Planting
Brown Rot of Stone Fruit in the Home Fruit Planting - Articles Articles
Brown rot can cause a blossom and twig blight, a canker, a leaf infection, and a fruit rot. More
Black Knot of Plum in the Home Fruit Planting
Black Knot of Plum in the Home Fruit Planting - Articles Articles
Black knot of plum, caused by the fungus Apiosporina mobosa, is well-named because of the characteristic black, warty knots it forms on the branches of infected trees. More
Bacterial Spot of Stone Fruit in Home Fruit Plantings
Bacterial Spot of Stone Fruit in Home Fruit Plantings - Articles Articles
Bacterial spot occurs in most countries where stone fruits are grown. Common hosts include peach, nectarine, prune, plum, and apricot. Other hosts are sweet and tart cherry, almond, and wild peach. More
Bacterial Canker of Stone Fruit in the Home Fruit Planting
Bacterial Canker of Stone Fruit in the Home Fruit Planting - Articles Articles
Bacterial canker of stone fruit is caused by the two related bacterial species, Pseudomonas syringae and P. morsprunorum. More
Source: Joseph OBrien, USDA Forest Service, Bugwood.org
Plum Disease - Plum Leaf Spot - Articles Articles

Plum Disease - Plum Leaf Spot

Kari A. Peter, Ph.D.

Leaf spot of plums and prune-type plums is caused by the fungus Coccomyces prunophorae. More
Source: Bruce Watt, University of Maine, Bugwood.org
Stone Fruit Disease - Powdery Mildew of Cherry and Plum - Articles Articles
The disease is caused by Podosphaeria oxyacanthae, one of the common species of the powdery mildew group of fungi. More
Source: Mike Schomaker, Colorado State Forest Service, Bugwood.org
Stone Fruit Disease - Plum Pockets - Articles Articles

Stone Fruit Disease - Plum Pockets

Kari A. Peter, Ph.D.

In the northeastern United States, the most important disease affecting American-type plums is known as plum pockets, or bladder plum. It is caused by Taphrina communis. More
Photo by G. Moorman
Plum Disease - Black Knot - Articles Articles

Plum Disease - Black Knot

Kari A. Peter, Ph.D.

Black knot of plum, caused by the fungus Dibotryon morbosum, is well-named because of the characteristic black, warty knots it forms on branches of infected trees. More
Page:
  1. 1
  2. 2