Life Sciences Commons^™

Ec81-1869 Guide To The Identification Of Physiological Disorders Of Landscape Plants, John E. Watkins, Donald H. Steinegger

University of Nebraska-Lincoln Extension: Historical Materials

Physiological disorders are plant diseases caused by non-living agents. Other terms for this group of disorders are abiotic diseases or noninfectious diseases.

Physiological disorders are often confused with pathogen-caused diseases but they do not spread from plant to plant as do diseases caused by living organisms. Landscape plants are often exposed to toxic materials, mechanical damage, nutritional stress, homeowner neglect and other stress factors in the urban environment.

This 4-color extension publication highlights the following physiological disorders of landscape plants: sun scald, drought, lightning injury, winter injury, root girdling, iron chlorosis, salt injury, herbicide injury and air pollution.

Ec81-1870 Guide To The Identification Of Diseases Of Shrubs, John E. Watkins

University of Nebraska-Lincoln Extension: Historical Materials

This 4-color extension circular identifies the following diseases of shrubs in the home garden and landscape disease series: rose mosaics (rose mosaic virus and rose yellow mosaic virus), rose rust, fire blight, powdery mildew, crown gall, scab, iron chlorosis, honesuckle leaf blight, and phomopsis twig blight.

Ec81-1240 Vegetable Gardening In Nebraska, Dale T. Lindgren, Laurie Hodges, Don Steinegger, Ralph E. Neild

University of Nebraska-Lincoln Extension: Historical Materials

Nebraskans are increasing their consumption of fresh vegetables — as appetizers, salads, side dishes, and snacks. Fresh vegetables are an integral part of a healthy, well-balanced diet. Although Nebraska's climate and soil are well-suited for many vegetables, most are supplied from out of the state, even during summer. Growing fresh vegetables can provide higher nutrition and flavor at less expense than buying fresh produce at the grocery store. A garden also can be a source of personal enjoyment and satisfaction.

This extension circular helps the gardener decide when, where, and how to plant and maintain a vegetable garden.

G81-552 Effects Of Weather On Corn Planting And Seedling Establishment, Ralph E. Neild

University of Nebraska-Lincoln Extension: Historical Materials

Corn planting usually begins when the average daily temperature first rises 55°F and the soil becomes sufficiently warm enough to initiate germination and sustain seedling growth. This may be as early as the middle of March in central Texas 700 miles south of Nebraska or as late as the middle of May in central South Dakota. Corn may be planted as early as the first week of April in southeast Nebraska and continue into the first week of June. Most of the corn, however, is planted between May 4 and May 21.

Corn planted early when the temperature is cool …

Aspen Resource Of Minnesota Usa, P.J. Jakes

Aspen Bibliography

No abstract provided.

Cryptosphaeria Canker And Libertella Decay Of Aspen, Thomas E. Hinds

Aspen Bibliography

A recently discovered, widely distributed canker disease of aspen and other poplars throughout the Rocky Mountain region is described. Inoculations with ascospore and conidial isolates of Cryptosphaeria populina show the fungus is capable of causing branch, sprout, and sapling mortality, trunk cankers, and the discoloration and decay of aspen stems previously associated with its imperfect stage, Libertella sp. The greatest average canker elongation 50 mo after September inoculations was 33.5 cm with sapwood decay and discoloration extending to 401 cm. The fungus caused an average weight loss of 13.5% in bark, 27.0% in sapwood, and 19.1% in heartwood blocks. Incidence …

Utilization Of Aspen Populus-Tremuloides Trees As A Ruminant Feed Component, M. Singh, L.D. Kamstra

Aspen Bibliography

When traditional roughages are in short supply or high in price, other fibrous feed sources for ruminants should be considered if available at a competitive price. One such fibrous material shown to have potential as a ruminant feed is the aspen tree (Populus tremuloides Michx.) harvested in its entire form to include bark, leaves and trunk. The aspen tree is the most widespread tree species in North America and the least utilized. Estimates exceed 6 million acres of mature trees in an area which would include the Black Hills (58,000 acres), the Great Lakes region and the Rocky …

Biomass And Production Of An Aspen-Mixed Hardwood-Spodosol Ecosystem In Northern Wisconsin, John Pastor, J.G. Bockheim

Aspen Bibliography

No abstract provided.

An Approach To Functionalizing Key Environmental Factors Forage Production In Rocky Mountain Aspen Populus-Tremuloides Stands, J.P. Roise, D.R. Betters, B.M. Kent

Aspen Bibliography

No abstract provided.

An Examination Of The Leaf Quaking Adaptation And Stomatal Distribution In Populus-Tremuloides, J.W. Rushin, J.E. Anderson

Aspen Bibliography

The leaves of quaking aspen (Populus tremuloides Michx.) have a flattened petiole that allows them to quake (oscillate and roll) under low wind velocities. It was hypothesized that this adaptation might enable the plant to respond to windy conditions that would increase transpirational losses. No effects of wind with or without leaf quaking on stomatal resistance were observed under controlled conditions in the field. If wind and leaf quaking affect stomatal resistance, such effects must be small in comparison to those caused by other factors such as leaf water potential and ambient humidity.

Aspen leaves are hypostomatal with stomata …

Effects Of Storage Temperature And Moisture Stress On Seed Germination And Early Seedling Development Of Trembling Aspen Populus-Tremuloides, G.H. Fechner, K.E. Burr, J.F. Myers

Aspen Bibliography

No abstract provided.

Improving Aspen Poplar Populus-Tremuloides And Prickly Rose Rosa-Acicularis Covered Rangeland With Herbicides And Fertilizer, G. Bowes

Aspen Bibliography

No abstract provided.