SelectedWorks - Donald Roberts

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Selected Works of Donald Roberts

Emeritus Professor

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About Donald Roberts

Present	Emeritus Professor, Utah State University ‐ Biology
Institution Organization Position Type Position Title Time Period to Options Current Position Affiliate my profile with this Institution

Biology

1964	Ph.D., University of California
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Evaluating physical and nutritional stress during mycelial growth as inducers ...

Mycological Research (2008)

Drauzio E. N. Rangel, Anne J. Anderson and Donald W. Roberts

Elevated tolerance to UV-B radiation and heat may be induced in conidia produced on fungi exposed during mycelial growth to ...

Cold activity of Beauveria and Metarhizium, and thermotolerance of Beauveria

Journal of Invertebrate Pathology (2008)

Éverton K. K. Fernandes, Drauzio E. N. Rangel, Áurea M. L. Moraes, Vânia R. E. P. Bittencourt, et al.

Heat and cold are environmental abiotic factors that restrict the use of entomopathogenic fungi as agents for biological control of ...

Variability in tolerance to UV-B radiation among Beauveria spp. isolates

Journal of Invertebrate Pathology (2007)

Éverton K. K. Fernandes, Drauzio E. N. Rangel, Âurea M. L. Moraes, Vânia R. E. P. Bittencourt, et al.

Solar radiation, particularly the UV-B component, negatively affects survival of entomopathogenic fungi in the field. In an effort to identify ...

Inducing UV-B tolerance of Metarhizium anisopliae var. anisopliae conidia results ...

Journal of Anhui Agriculture University, Hefei, China (2007)

Drauzio E. N. Rangel and Donald W. Roberts

The Mormon cricket, an old threat in modern day western ...

Journal of Anhui Agriculture University, Hefei, China (2007)

Donald W. Roberts, Drauzio E. N. Rangel, Chad A. Keyser, Helen G. Bignayan, et al.

Conidial pigmentation is important to tolerance against solar-simulated radiation in ...

Photochemistry and Photobiology (2006)

Gilberto U. L. Braga, Drauzio E. N. Rangel, Stephan D. Flint, Anne J. Anderson, et al.

The importance of conidial pigmentation to solar UV radiation tolerance in the entomopathogenic fungus Metarhizium anisopliae var. anisopliae, was estimated ...

Evaluation of novel fungus and nematode isolates for control of ...

Biological Control (2006)

Diane G. Alston, Drauzio E. N. Rangel, Lawrence A. Lacey, Hernani G. Golez, et al.

The primary objective was to identify potential nematode and fungus pathogens for control of plum curculio (Conotrachelus nenuphar) larvae. Initial ...

Mutants and isolates of Metarhizium anisopliae are diverse in their ...

Journal of Invertebrate Pathology (2006)

Drauzio E. N. Rangel, Michael J. Butler, Javad Torabinejad, Anne J. Anderson, et al.

Conidial pigmentation is involved in protection against heat and UV radiation in several fungal species. In this study, we compare ...

Growth of Metarhizium anisopliae on non-preferred carbon sources yields conidia ...

Journal of Invertebrate Pathology (2006)

Drauzio E. N. Rangel, Anne J. Anderson and Donald W. Roberts

Conidia of the insect-pathogenic fungus Metarhizium anisopliae var. anisopliae produced on different growth substrates (culture media or insect cadavers) demonstrate ...

Influence of growth environment on tolerance to UV-B radiation, germination ...

Journal of Invertebrate Pathology (2005)

Drauzio E. N. Rangel, Gilberto U. L. Braga, Anne J. Anderson and Donald W. Roberts

We previously reported wide variability in UV-B tolerance among different Metarhizium anisopliae isolates [Braga, G.U.L., Flint, S.D., Miller, C.D., Anderson, ...

The fungal past, present and future: Germination, ramification and reproduction.

Journal of Invertebrate Pathology (2005)

Louela A. Castrillo, Donald W. Roberts and John D. Vandenberg

Impact of the entomopathogenic fungus Verticullium lecanii on development of ...

Journal of Invertebrate Pathology (2005)

Jeong Jun Kim, Kyu Chin Kim and Donald W. Roberts

The parasitoid Aphidius colemani developed normally (approximately 90% adult emergence) when its cotton aphid (Aphis gossypii) host was treated with ...

Simple, inexpensive media for mass production of three entomophthoralean fungi

Mycological Research (2005)

Luis G. Leite, Sérgio B. Alves, Antonio Batista Filho and Donald W. Roberts

The entomophthoralean fungi Batkoa sp., Furia sp. and Neozygites floridana have been suggested for biocontrol of insect pests: the first ...

Variability in conidial thermotolerance of Metarhizium anisopliae isolates from different ...

Journal of Invertebrate Pathology (2005)

Drauzio E. N. Rangel, Gilberto U. L. Braga, Anne J. Anderson and Donald W. Roberts

Notable variability in thermotolerance was found among conidia of 16 isolates of the insect-pathogenic fungi Metarhizium anisopliae var. anisopliae and ...

Variations in UV-B tolerance and germination speed of Metarhizium anisopliae ...

Journal of Invertebrate Pathology (2004)

Drauzio E. N. Rangel, Gilberto U. L. Braga, Stephan D. Flint, Anne J. Anderson, et al.

Solar ultraviolet radiation (UV-A and UV-B) is a major factor in failure of programs using the insect pathogenic fungus Metarhizium ...

Enzyme Activities Associated With Oxidative Stress in Metarhizium Anisopliae During ...

Canadia Journal of Microbiology (2004)

Charles D. Miller, Drauzio E. N. Rangel, Gilberto U. L. Braga, Stephan D. Flint, et al.

Metarhizium anisopliae isolates have a wide insect host range, but an impediment to their commercial use as a biocontrol agent ...

Metarhizium spp., Cosmopolitan Insect-Pathogenic Fungi: Mycological aspects

Advances in Applied Microbiology (2004)

Donald W. Roberts and Raymond J. St. Leger

Publisher Summary: The chapter focuses on mycological aspects of the genus Metarhizium. The genus includes several species, varieties within species, ...

Zoophthora Radicans (Zygomycetes: Entomophthorales) Conidia Production From Empoasca Kraemeri and ...

Biological Control (2003)

S. P. Wraight, S. Galaini-Wraight, R. I. Carruthers and Donald W. Roberts

Laboratory and field studies were conducted to assess the effects of temperature on sporulation of a dried-mycelium formulation of the ...

Effects of Salts, Vitamins, Sugars and Nitrogen Sources on the ...

Mycological Research (2003)

Luis G. Leite, Sérgio B. Alves, Antonio Batista Filho and Donald W. Roberts

Entomophthorales pathogenic to insects and mites often cause epizootics in their host populations, but some have been difficult to culture ...

Histologic Study of Head Cartilage Degeneration in Rainbow Trout (Oncorhynchus ...

J. Submicrosc. Cytol. Pathol. (2003)

I. J. Bechara, N. N. Youssef and Donald W. Roberts

A light microscopy study of head cartilage tissue in rainbow trout alevins (Oncorhynchus mykiss) infected with the parasite Myxobolus cerebralis ...

Damage and Recovery From UV-b Exposure in Conidia of the ...

Mycologia (2002)

Gilberto U. L. Braga, Drauzio E. N. Rangel, Stephan D. Flint, C. D. Miller, et al.

We evaluated the effects of exposure to doses supplied at an environmentally realistic intensity of UV-B radiation (800 mW m(-2) ...

Occurrence of Entomophthorales on Spittlebugs Pests of Pasture in Eastern ...

Arq. Inst. Biol., São Paulo (2002)

Luis G. Leite, Sérgio B. Alves, H. M. Takada, Antonio Batista Filho, et al.

Spittlebugs (Hemiptera: Cercopidae) are the most important pests of pasture in Brazil. Nymphal behavior, i.e. residing in the soil, makes ...

Preservacão De Micélio De Batkoa Sp. E. Furia Sp. (Entomophthorales ...

Arq. Inst. Biol., São Paulo (2002)

Luis G. Leite, Sérgio B. Alves, Antonio Batista Filho, J. E. M. Almeida, et al.

PRESERVATION OF BATKOA SP. AND FURIA SP. (ENTOMOPHTHORALES )DRY MYCELIUM WITH COMBINATIONS OF DESICCANTS AND OXYGEN REDUCERS. Formulation is the ...

Study of the tail fin rays of rainbow trout (Oncorhynchus ...

J. Submicrosc. Cytol. Pathol. (2002)

I. J. Bechara, N. N. Youssef and Donald W. Roberts

A light, transmission and scanning microscope study of the rays (lepidotrichia) forming the tail fin of rainbow trout (Oncorhynchus mykiss) ...

Comparison of Susceptibility of Five Cutthroat Trout Strains to Myxobolus ...

Journal of Aquatic Animal Health (2002)

Eric Wagner, Ronney Arndt, Mark Brough and Donald W. Roberts

Susceptibility to infection by the myxosporean parasite Myxobolus cerebralis was compared among strains of cutthroat trout Oncorhynchus clarki in two ...