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Full-Text Articles in Ecology and Evolutionary Biology
Actinomycetes Of Virgin Utah Soils With Special Reference To Antagonisms, Paul H. Krumperman
Actinomycetes Of Virgin Utah Soils With Special Reference To Antagonisms, Paul H. Krumperman
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The importance of actinomycetes in the soils was generally overlooked until about 1913. The investigators Hiltner and Stormer and Beijerinck began systemtaic study of their occurrence and role in soil fertility. The work done by these men and others since 1913 has proved actinomycetes to occur abundantly in most soils of the world. This work done by these men and others since 1913 has proved actinomycetes to occur abundantly in most soils of the world. This work has also proved the function of these organisms to be that of decomposing highly resistant materials such as humus and complex polysaccharide compounds. …
Leafhoppers (Cicadellidae) Associated With The Stone Fruit Orchards Of Northern Utah, Mervin W. Nielson
Leafhoppers (Cicadellidae) Associated With The Stone Fruit Orchards Of Northern Utah, Mervin W. Nielson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Virus diseases of stone fruit orchards have existed in Utah for more than a quarter of a century and are seriously diminishing the peach and cherry fruit production. Western X of peach, rusty mottle of cherry, wilt and decline of cherry, and little cherry constitute the most economically important stone fruit virus diseases in Utah. Many orchards, particularly in Davis County, have 50 to 83 percent of the trees infected with one or more of the yellow-red viroses. Surveys have shown that the diseases are spreading from 3 to 5 percent each year. It is believed that certain insects are …