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Publications
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Publications Subject Category Search
Publications
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Results: 149 Publications found
for Landscapes, Ornamentals, and Houseplants
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A Consumer's Guide to Purchasing, Producing, Storing, and Using Edible Flowers
Edible flowers can be used to add color, fragrance, and flavor to salads, soups, entrees, desserts, and drinks. Since the late 1980s, there has been a resurgence in the popularity of edible flowers used by chefs and people entertaining at home. With the variety of edible flowers available, selections of size, shape, and color suitable for any occasion are easy to find. Note: This publication is available in PDF only; it is not available in hard copy from the Publications Distribution Center.
Department:
Horticulture
Catalog Number:
XJ0011
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A Guide to Preserving Trees in Development Projects
Trees and green space provide benefits and add value to developments. Lots where trees are preserved can be sold more quickly and at higher prices--research has shown that mature trees increase the worth of a property up to 12 percent. This 30-page publication explains tree health and environmental considerations and details how preconstruction activities, tree inventories, repairing tree injury, and post-construction activities can help preserve trees in development projects.
Department:
School of Forest Resources
Catalog Number:
UH122
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Abiotic Diseases of Woody Ornamentals
Of the two major types of disease (BIOTIC, those in which fungi, bacteria, viruses, nematodes, etc. are involved; and ABIOTIC, those in which non living things are involved), ABIOTIC diseases are by far the most important ones on landscape and nursery plants. Abiotic diseases are the result of the interaction, over an extended period of time, between the plant and one or more factors such as lack of space for root growth, the presence of chronic or acute levels of air or water pollutants, or the presence of extremes of moisture, heat, light, soil pH, and nutrients. Most abiotic diseases cause generalized symptoms to develop over a large portion of the tree or shrub. Wilting, yellowing, the development of smaller than normal leaves, slowing of growth, branch death, water sprout (epicormic shoot) formation, premature autumn leaf coloration, and heavier than normal seed production are some of the symptoms characteristic of abiotic diseases. Sometimes very similar symptoms develop in a location on very different species of plants. This is another indication that abiotic factors rather than living pathogens are involved in damaging plant health. Below is a brief review of abiotic diseases other than those caused by pollution.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0001
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Agricultural Water Use in the Allegheny/Monongahela/Ohio River Basins
2002 agricultural water use regulations in the Allegheny, Monongahela, and/or Ohio River basins. Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Agricultural & Biological Engineering
Catalog Number:
F-201
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Amelanchier (Shadbush, Serviceberry) Diseases
Infected flowers are killed and often remain attached throughout the season. The ends of twigs and branches become brown or black and may curl over into a shepherd’s crook shape. Dead leaves may remain attached to the tree. Cankers formed the previous season may ooze a cloudy liquid during wet spring weather. Branches will be killed as slightly sunken cankers enlarge into larger branches and even into the main trunk.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0002
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Anthracnose on Shade Trees
Ash (Fraxinus), oak (Quercus), sycamore (Platanus), maple (Acer), dogwood (Cornus), and many other deciduous hardwoods are susceptible to a leaf disease called anthracnose that is caused by various species of the fungus Apiognomonia. The asexual stage (the reproductive stage that does not require mating) looks so very different from the sexual stage (the reproductive phase that requires mating) that early scientists thought they were totally different organisms not related to Apiognomonia. It is now known that some of the fungi previously named Colletotrichum, Gloeosporium, and Discula are just the asexual stage of Apiognomonia.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0003
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Arborvitae
This publication discusses branchlet death, during which the oldest branchlets turn brown in autumn and fall off.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0004
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Armillaria Root Rot
Armillaria root rot, sometimes called shoestring root rot, is caused by various species of the fungus Armillaria. Susceptible plants include most deciduous and coniferous species. Plants most susceptible to Armillaria root rot are those under stress from prolonged drought, repeated insect defoliation, root injury, or recent transplanting.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0005
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Ash
Anthracnose
Young unfolding leaves are distorted and develop greenish-brown to dark-brown spots at their tips, along their margins, and between the veins. When fully expanded leaves are attacked, light-brown to tan blotches form. Severely infected leaves fall prematurely. Infected young twigs are girdled and killed. Disease severity is greatest on the lower branches. Fungal fruiting structures (acervuli) form in the infected tissues and are only slightly darker in color than the spots. A magnifying glass is required to find the acervuli in the spots.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0006
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Azalea/Rhododendron Diseases
This publication discusses common diseases of azaleas and rhododendron.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0007
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Bacterial Leaf Scorch
Leaf scorch, sometimes called marginal leaf burn, describes the death of tissue along the edge of the leaf. This symptom develops when sufficient water does not reach the leaf margin cells. This can occur if (1) there is insufficient moisture in the soil (2) water is lost too quickly from the leaves to be replaced adequately, (3) roots have been killed by plant pathogens, excavation, or compaction or (4) fungi or bacteria invade and plug the water conducting vessels (xylem) in the plant.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0008
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Bacterial Wetwood or Slime Flux
Many mature trees, including elms, oak, tulip poplar, and maple, exhibit large light or dark vertical streaks on their trunks resulting from slimy liquid oozing out of crack or wounds and running down the bark. This is called "slime flux." Sometimes this liquid is very abundant and foul smelling. If an affected tree is cut down, the heartwood is darker in color than surrounding wood, thus the name "wetwood." Although the symptoms are unsightly, little damage is done to the tree in most situations. However, if affected trees are under severe stress from other factors such as soil compaction, wetwood bacteria can move into the sapwood and cause leaf yellowing, wilting, and a branch dieback.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0009
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Beech
Bark disease with circular to horizontal elliptic cankers form on the bark. Cracks form in the cankered bark. As large areas of bark are affected, the tree is girdled and killed. White wooly specks observed on the bark in August are wooly beech scales. The fungus that invades after scale feeding forms red, pimplelike fruiting structures in the cankers.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0010
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Black Knot
The fungus Alowrightia 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. The disease is very destructive, killing twigs and limbs, and occasionally whole trees. Although there are no cherry varieties that are reliably resistant to black knot, there are some plums with resistance.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0011
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Boston Ivy (Parthenocissus) Disease
Leaf spot; angular, reddish to gray brown spots enlarge and turn brown at the margins with tiny, black fungal fruiting bodies in the spots. Dieback occurs if the plant is severely infected.
Note: Available in PDF only; not available in hard copy from the Publications Distribution Center.
Department:
Plant Pathology
Catalog Number:
XL0012
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