Articles

119 Results

List Grid

Tree Fruit Insect and Mite Control Toolbox - Pesticide Resistance Management
Tree Fruit Insect and Mite Control Toolbox - Pesticide Resistance Management - Articles Articles
A number of insect and mite pests have developed varying levels of resistance to some insecticidal chemistries over the years, including the organophosphates, carbamates, and pyrethroids. More
Tree Fruit Disease Toolbox - Fungicide Resistance Management
Tree Fruit Disease Toolbox - Fungicide Resistance Management - Articles Articles
Resistance has sometimes resulted in pest-management-program failures. Below are presented tactics to help delay resistance to fungicides. More
Female spotted lanternfly and her egg mass. Photo: Emelie Swackhamer, Penn State
Tree Fruit Insect Pest - Spotted Lanternfly - Articles Articles

Tree Fruit Insect Pest - Spotted Lanternfly

Grzegorz (Greg) Krawczyk, Ph.D.

The spotted lanternfly, Lycorma delicatula, an invasive plant hopper was first detected in Pennsylvania in the fall of 2014. More
Andrena on apple blossom. Photo: David Biddinger
Orchard Pollination: Wild Bees - Articles Articles

Orchard Pollination: Wild Bees

Dave Biddinger, Ph.D.

Managed pollinators like honey bees and mason bees are important pollinators for orchards, but research suggests that wild bees also contribute significantly to fruit tree pollination. More
Osmia cornifrons on an apple blossom. Photo: David Biddinger
Orchard Pollination: Solitary (Mason) Bees - Articles Articles
Growers of bee-pollinated crops, particularly apples, may be interested in the possible use of solitary bees as pollinators. More
Nitrogen deficiency symptoms on peach, which can be prevented by leaf analysis and block-specific fertilization.
Orchard Nutrition: An Overview - Articles Articles

Orchard Nutrition: An Overview

Robert Crassweller, Ph.D.

Nutritional requirements of fruit trees differ from those of agronomic crops, cover crops, and orchard sod. More
Tyvek® tree guard. Photo: Rob Crassweller
Orchard Weed Control - Protection of Tree Trunks - Articles Articles
Some of the burn-down herbicides have been implicated as possible causes of damage to young tree trunks that have green tissue on portions of the lower trunk. More
Reentry and Preharvest Intervals - Antibiotics and Fungicides
Reentry and Preharvest Intervals - Antibiotics and Fungicides - Articles Articles
Listed below are pesticides used on tree fruits. Not all materials listed here are suggested in the spray schedules. More
Pesticidas y la Salud de los Polinizadores
Pesticidas y la Salud de los Polinizadores - Articles Articles

Pesticidas y la Salud de los Polinizadores

Sharon I Gripp, Héctor Núñez Contreras

Penn State está a la vanguardia en asuntos relacionados con la salud de los polinizadores. More
Orchard Production Systems - Transition to Higher Tree Densities
Orchard Production Systems - Transition to Higher Tree Densities - Articles Articles
Industry challenges have led to recent transitions of orchards to high density production systems. More
Fruit Production - Technical References
Fruit Production - Technical References - Articles Articles

Fruit Production - Technical References

Robert Crassweller, Ph.D.

There are a number of sources of fruit production information available depending upon the level of knowledge desired. More
A wind machine mixes the warmer air from the upper portions of the inversion layer with the colder air near the ground, raising air temperatures around the trees by a few degrees. Photo: Tara Baugher
Orchard Frost - Protection with Wind Machines - Articles Articles
Susceptibility to frost damage depends on a tree’s stage of development, variety, and location, but certain preventative measures can be taken. More
Orchard Weed Control - Fall Herbicide Applications
Orchard Weed Control - Fall Herbicide Applications - Articles Articles
For years we have all heard the landscape green industry say that "fall is for planting". As orchardists, we should consider that fall is a very good time for applying weed control materials. More
Examples of stages of fruit bud development: top left - apple tight cluster; top right - apple first bloom; lower left - sweet cherry first white; lower right - peach pink.
Orchard Frost - Critical Temperatures for Various Fruits - Articles Articles
The temperature at which fruit buds are injured depends primarily on their stage of development. More
Pruning just before a cold snap increases susceptibility to injury.
Tree Fruit Cold Hardiness - Pruning Effects - Articles Articles

Tree Fruit Cold Hardiness - Pruning Effects

Rich Marini, Ph.D., James Schupp, Ph.D.

Fruit trees begin to go dormant in response to shortening day length in the fall. Exposure to freezing temperatures accelerates the onset of dormancy. More
Stone Fruit Disease - Prunus Stem Pitting
Stone Fruit Disease - Prunus Stem Pitting - Articles Articles
Prunus stem pitting, caused by the tomato ringspot virus, is an important disease of all stone fruits. It is also called prune brownline and constriction disease. More
Dagger Nematode (Xiphinema spp.). Photo courtesy N.C. State University.
Nematodes - Preventing Problems in Deciduous Fruit Trees - Articles Articles
Nematodes reduce tree vigor and crop yields by parasitizing tree roots; they predispose trees to disease, reduce winter hardiness, and transmit viruses. More
Source: William M. Brown Jr., Bugwood.org
Peach Disease - Powdery Mildew of Peach, Nectarine, and Apricot - Articles Articles
Powdery mildew, Sphaerotheca pannosa, sometimes called rose mildew (it affects some woody ornamentals), is not often serious. More
Source: Bugwood.org
Tree Fruit Disease - Phytophthora Collar, Crown and Root Rots - Articles Articles
Phytophthora collar, crown, and root rots, Phytophthora cactorum, continue to be a major cause of tree death in Pennsylvania orchards. These rots can affect both pome and stone fruit. More
Although the fruits remain susceptible through harvest, it is usually only infections that occur during the shuck split to pit hardening stage of development that have an opportunity to show symptoms at harvest. Photo by K. Peter.
Peach Disease - Scab - Articles Articles

Peach Disease - Scab

Kari A. Peter, Ph.D.

Peach scab, Cladosporium carpophilum, is an important disease in warm, humid peach-producing areas of the world. More
Voles may cause extensive damage to fruit trees and orchards as a result of girdling seedlings and trees and damaging roots.
Orchard Wildlife - Integrated Management of Voles in Orchards - Articles Articles
Voles are primarily vegetarians, feeding on grasses, tubers, and seeds. They also consume the bark of young trees. More
Stone Fruit Insect and Mite Control Toolbox - Insecticide and Miticide Timing
Stone Fruit Insect and Mite Control Toolbox - Insecticide and Miticide Timing - Articles Articles
Timing of a spray application in relation to insect and mite biology is important for achieving the best results. More
Stone Fruit Insect and Mite Control Toolbox - Insecticide/Miticide Efficacy
Stone Fruit Insect and Mite Control Toolbox - Insecticide/Miticide Efficacy - Articles Articles
Insecticides and miticides should be selected based on the pests to be controlled and product efficacy. Prevent resistance to pest control chemicals by alternating chemicals by IRAC code group. More
Stone Fruit Disease Control Toolbox - Fungicide and Antibiotic Timing
Stone Fruit Disease Control Toolbox - Fungicide and Antibiotic Timing - Articles Articles
Timing of a fungicide application in relation to disease development is important for achieving the best results. More
The Cytospora canker fungus attacks the woody parts of stone fruit trees through bark injuries and pruning cuts, and through dead shoots and buds. Photo by K. Peter.
Stone Fruit Disease - Cytospora Canker - Articles Articles
Cytospora canker is one of the most destructive diseases of peaches, nectarines, apricots, sweet cherries, and plums in Pennsylvania. More
Page:
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5