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  • All About Apple Rootstocks (FS-2022-0638)

    … that can impart important characteristics to the tree, improving the uniformity, economics and profitability … rootstocks by fusing, or “grafting,” the roots from one tree (rootstock) to the shoots, or “scion,” of another. The … scions in an effort to confer a new benefit to both the tree and the scion. This technique has been used for apples …

  • Rust Diseases of Trees

    … the Rosaceae family (crabapple, pears, apples,  hawthorn, serviceberry/shadbush, and quince). Juniperus virginiana, the … cankers. Cedar-quince rust (Gymnosporangium clavipes) on serviceberry (Amelanchier) fruit Photo: Penn State Depart. of …

  • Browning and Defoliation of White Oaks

    … to browning of the foliage. 6. A variety of pests and diseases that are usually considered to be opportunistic … symptomatic trees. Sawdust-like frass at the base of the tree or on the bark of the lower trunk indicates the invasion … likely an accelerated version of what is commonly called “tree decline”. Symptoms of typical tree decline include loss …

  • IPM - Prevent, Identify, and Manage Plant Problems

    … or disease management more difficult), often the case with bagworms that cause extensive damage on evergreens.  The vast … Some insect pests may not require action. For example, bagworms on evergreens should be controlled because the pest …

  • Woodpecker and Sapsucker Damage on Trees

    … trees may attract insects as well as porcupines or tree squirrels. These feeding wounds may also serve as entrances for diseases and wood decaying organisms. Sapsuckers drill … off. Occasionally limb and trunk girdling may kill the tree. Woodpeckers also communicate with each other by …

  • Thousand Cankers Disease

    … Walnut twig beetle galleries under the bark of an infested tree. Photo Whitney Cranshaw, Colorado State University …

  • Natural Area Management Services Directory: Small Woodlot Tree Harvesting

    … enable chosen trees to thrive, help to control insects and diseases, and more. Small Woodlot Tree Harvesting Providers Please note that the mention of, … Click on the name below to obtain contact information A&A Tree Experts, Inc. - Baltimore County Davey Tree Expert …

  • Apple and Pear Problems not caused by Diseases or Insects

    … - cracks usually occur on the south or west side of a tree. Caused, in part, by differential freezing and thawing … string trimmer injury, embedded wires, or collars from tree support apparatus. - Mulch to within 6 inches of trunk. … fertilizers. Related information Apple and Pear Diseases Apple and Pear Insect Pests Protecting Fruit from …

  • Root Rots on Trees and Shrubs

    … and dark brown. Root rots of pine Two specific root rot diseases on  pine  are procerum root rot and annosum root … eventually browning. Dying needles usually remain on the tree. The bark and wood become spongy and develop resin … Resin may also ooze through the bark at the base of the tree and exposed roots become resin soaked. Trees planted in …

  • Boxwood: Identify and Manage Common Problems

    Boxwood. Photo: Karan A. Rawlins, University of Georgia, … and mature size Disease and insect resistant plants Pruning Watering and mulch Fertilizing Miscellaneous Site … Extension   Disease and Insect Resistant Plants Boxwood Pruning The most appropriate pruning method for boxwood is …