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The Manuscript Works Of S. Fred Prince (1857-1951), Sarah Burke Cahalan, Jason W. Dean 2018 University of Dayton

The Manuscript Works Of S. Fred Prince (1857-1951), Sarah Burke Cahalan, Jason W. Dean

Marian Library/IMRI Faculty Publications

S. Fred Prince, a botanical illustrator and amateur scientist, is a largely unknown artist whose work on the American landscape demonstrates his eligibility to be considered in the lineage of self-taught illustrator-naturalists such as Mark Catesby and Genevieve Jones. In this article, we present a survey of extant Prince materials identified at time of writing, describing their contents and physical characteristics. Beyond this survey and description, we also provide a biographical sketch and timeline of Prince's life.


Pathogenicity, Host Response And Control Of Cercospora Leaf-Spot Of Sugar Beets, Edgar F. Vestal 2017 Iowa State College

Pathogenicity, Host Response And Control Of Cercospora Leaf-Spot Of Sugar Beets, Edgar F. Vestal

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

On artificial media conidia of Cercospora beticola began to appear in 12 to 20 hours after inoculation, and the optimum production was from 48 to 96 hours after transfer.

Germination of the conidium may take place at any point, but more often near a septum and from the basal end of the cell first.

Germination of the conidia did not take place on the living leaf in an atmosphere containing less than 90 percent humidity.

The humidity of the leaf surface was found to be an average of 3.5 percent higher than the surrounding atmosphere.

An air humidity of ...


Resistance Of Dent Corn To Basisporium Gallarum Moll., C. S. Reddy 2017 Iowa State College

Resistance Of Dent Corn To Basisporium Gallarum Moll., C. S. Reddy

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Injury by Basisporium gallarum is associated with cessation of translocation within the corn plant. It occurs at the time of germination, after normal maturity, and when plants die prematurely from cold or other causes.

Basisporium-infected seed dies within a few days after it is planted in soils slightly below the temperature range for germination. The organism kills the germ before active translocation sets in. Active translocation, in this case, means germination and germination marks a change in the embryo from neutral to acid reaction. Acid reaction in the cob was shown to be correlated with resistance to Basisporium infection. Therefore ...


The Pathogenicity And Seasonal Development Of Gymnosporangium In Iowa, Donald E. Bliss 2017 Iowa State College

The Pathogenicity And Seasonal Development Of Gymnosporangium In Iowa, Donald E. Bliss

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Seven species of the genus Gymnosporangium occur in Iowa, but only G. juniperi-virginianae, causing cedar-apple rust, and G. globosum, causing hawthorn rust, are common. The latter is of little economic importance.

The epidemic of cedar-apple rust in 1928 caused an estimated loss of $200,000 in Iowa.

Six to seven hours were required to produce abundant sporulation from air dry galls of G. juniperi-virginianae regardless of whether the period of soaking was 30 or 180 minutes.

Newly-matured aecidiospores of G. juniperi-virginianae germinated to the extent of 54 percent in July. A lot was divided and the percentage of germination in ...


The Relation Of Moisture To Respiration And Heating In Stored Oats, A. L. Bakke, N. L. Noecker 2017 Iowa State College

The Relation Of Moisture To Respiration And Heating In Stored Oats, A. L. Bakke, N. L. Noecker

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

1. Considerable variation in oxygen consumption is found even with oats of low moisture content.

2. Heating of oats in well insulated flasks is negligible when the moisture is below 15.00 percent.

3. Oats with the moisture content above 15.00 percent, heated as the moisture content was increased up to 24.00 percent, at which point the maximum heating was reached. When the moisture content was increased beyond 24.00 percent a gradual but irregular falling off in heating was noted.

4. Oats with a moisture content of 40.01 percent consumed the greatest quantity of oxygen, whereas ...


The Pathogenicity Of Fusarium Niveum (Efs.) And The Development Of Wilt Resistant Strains Of Citrullus Vulgaris (Schrad.), D. R. Porter, I. E. Melhus 2017 Iowa State College

The Pathogenicity Of Fusarium Niveum (Efs.) And The Development Of Wilt Resistant Strains Of Citrullus Vulgaris (Schrad.), D. R. Porter, I. E. Melhus

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Watermelon wilt, caused by Fusarium niveum EFS., is a serious disease in Iowa as well as in many other sections of the United States. The present Iowa acreage is 90 percent less than it was before wilt became a factor.

Infection may occur through the roots formed on a runner covered with infested soil. Injury induced by wind-blown sand seemed to favor wilt infection.

Comparative physiologic tests were made with 18 cultures of Fusarium niveum obtained from widely separated localities. These cultures seemed to differ in: (a) rate of growth on artificial media, (b) type of pigmentation, (c) rate of ...


The Effect Of Delayed Harvest Upon Yield Of Grain, L. C. Burnett, A. L. Bakke 2017 Iowa State College

The Effect Of Delayed Harvest Upon Yield Of Grain, L. C. Burnett, A. L. Bakke

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

In 1927 yield and moisture data were secured at semi-weekly harvest intervals for four varieties of oats, two of winter wheat and two of barley. In 1928 this experiment was repeated using six varieties of oats, two of winter wheat and four of barley.

The data secured in these studies show increases in yields which indicate that photosynthesis and translocation of food material to the kernel may continue much longer than has been previously reported. The yields continued to rise until the moisture content of the grain had fallen to percentages varying, in 1927, between 33.6 and 10.0 ...


Infection Studies Of Diplodia Zeae (Schw.) Lev. And Control Of Seedling Blights Of Corn, W. P. Raleigh 2017 Iowa State College

Infection Studies Of Diplodia Zeae (Schw.) Lev. And Control Of Seedling Blights Of Corn, W. P. Raleigh

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The two most important symptoms of the corn disease caused by Diplodia zeae are seedling blight and ear rot.

Artificial inoculation of the ears was effected in all stages of their development but most readily in the milk stage. Infection of seedlings from Diplodia-infected kernels usually takes place in the natural wounds at the points of production of the secondary radicles near the attachment of the mesocotyl to the scutellum.

Field experiments showed that Diplodia-infected seed in 1925 and 1927 produced 4.5 and 1.3 times as many weak plants, respectively, as did nearly disease-free seed.

Plants that are ...


Infection Studies With Watermelon Wilt Caused By Fusarium Niveum Efs., D. R. Porter 2017 Iowa State College

Infection Studies With Watermelon Wilt Caused By Fusarium Niveum Efs., D. R. Porter

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Watermelon wilt, caused by Fusarium niveum, is a serious disease in Iowa and in many other sections of the United States. The present Iowa acreage is less than 10 percent of the acreage before wilt became a factor.

Three heretofore undescribed seedling symptoms are described. These are: seedling rot, damping off and stunting.

The organism may cause lesions on any of the roots. These are at first water-logged and become discolored in advanced stages. The lesions vary in length from a trace to 28 centimeters.

Infection may be induced thru the use of infested soil, by means of spore suspensions ...


A Study Of Sclerospora Graminicola (Sacc.) Schroet. On Setaria Viridis (L.) Beauv. And Zea Mays L., I. E. Melhus, F. H. Van Haltern, Donald E. Bliss 2017 Iowa State College

A Study Of Sclerospora Graminicola (Sacc.) Schroet. On Setaria Viridis (L.) Beauv. And Zea Mays L., I. E. Melhus, F. H. Van Haltern, Donald E. Bliss

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Conidial sporulation of Sclerospora graminicola has been observed in the day time occurring naturally in the field and under artificial conditions in the laboratory. The period required for the development of mature conidia lies between 4 hours 35 minutes and 111/2 hours. The conditions which seem necessary for the production of conidia, whether during the day or night, are: a completely saturated atmosphere, turgid host leaves, a slight moisture film on the surface of the leaves and a temperature ranging between 8° and 27 °C.

When flooded into a drop of water immediately after being discharged, conidia were ...


Differentiating The Neches River Rose Mallow (Hibiscus Dasycalyx) From Its Congeners By Means Of Phylogenetics And Population Genetics, Julia Norrell 2017 University of Texas at Tyler

Differentiating The Neches River Rose Mallow (Hibiscus Dasycalyx) From Its Congeners By Means Of Phylogenetics And Population Genetics, Julia Norrell

Biology Theses

This study used molecular phylogenetic methods to attempt to resolve the taxonomic status of the federally threatened East Texas-endemic wildflower, the Neches River Rose Mallow (Hibiscus dasycalyx). Hibiscus dasycalyx co-occurs with two other closely related congeners that are currently not of conservation concern: the halberdleaf rose mallow (H. laevis); and the crimson-eyed rose mallow (H. moscheutos). This study assessed the phylogeny of these three Hibiscus species, and attempted to determine if there is possible hybridization occurring between them. To this end, Restriction Site Associated DNA Sequencing (RAD-Seq), a Next Generation Sequencing method, was used to generate genome-wide polymorphic genetic data ...


Expanding Access To Biodiversity Literature, Patrick Randall 2017 Harvard University

Expanding Access To Biodiversity Literature, Patrick Randall

Digital Initiatives Symposium

Expanding Access to Biodiversity Literature (EABL) is an IMLS-funded grant designed to enhance the collection of the Biodiversity Heritage Library (BHL), a digital library providing open access to over 50 million pages of legacy biodiversity literature.

BHL's collection is built on the digitized holdings of its member libraries, typically large research universities, natural history museums, and other well-funded organizations. EABL, however, solicits content outside the BHL consortium; small organizations that often lack the resources for cataloging and digitization nevertheless have valuable and unique literature to contribute. This has created new challenges for BHL workflows, as well as opportunities for ...


Phenotypic Variation And Genetic Purity Of The Original 'Prime-Jim®' X 'Arapaho' Population, Loren M. Luther 2017 University of Arkansas

Phenotypic Variation And Genetic Purity Of The Original 'Prime-Jim®' X 'Arapaho' Population, Loren M. Luther

Horticulture Undergraduate Honors Theses

In 2013, Castro et al., produced the first linkage map for primocane-fruiting blackberries using the cross ‘Prime-Jim®’ x ‘Arapaho.’ This mapping population has been maintained since the original experiment with the hopes of conducting future studies. Further research was determined to be needed on the population to better characterize additional phenotypic traits, and since nine years had passed since the seedlings were established, there was a need to assess the continued genetic purity of the population using molecular methods. Phenotypic data was collected to analyze the variation of the population including soluble solids content, titratable acidity, average weight, shape, and ...


Holcus Bacterial Spot Of Zea Mays And Holcus Species, James B. Kendrick 2017 Iowa State College

Holcus Bacterial Spot Of Zea Mays And Holcus Species, James B. Kendrick

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

A bacterial leaf spot disease on corn (Z ea mays L.) has been under observation in Iowa since 1916. In the fall' of 1924, it was quite prevalent on Zea mays, and on volunteer sorghum (Holcus sorghum L.) growing together near Ames, Iowa. Further examination revealed the presence of a somewhat similar leaf spot on Holcus sorghum, sudan grass [H. s01'ghurn val'. sudanensis (Piper) Hitchc.]' Johnson grass (H. halepensis L.) and pearl millet [Pennisetum glancttm (L.) R.Br.]. 'fhese observations led to a cultural study of the causal agents and a survey of the literature on bacterial diseases of ...


Germination And Storage Of Apple Seeds, A. L. Bakke, H. W. Richey, Kenneth Reeves 2017 Iowa State College

Germination And Storage Of Apple Seeds, A. L. Bakke, H. W. Richey, Kenneth Reeves

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Apple seeds will not germinate immediately after the fruit has become mature enough for picking. It is necessary for the seed to pass thru a stage of after-ripening.

The freshly extracted apple seed contains about 85 percent moisture. At room temperature approximately one-half of the moisture is lost during the first five days.

Soaking the seed prior to planting does not increase germination.

Ninety-one percent of apple seeds prevented from drying out when they were extracted from the fruit germinated. The best temperature for storage was found to be a temperature between 10 and 30 C. Seeds which had air ...


The Extent To Which Weeds Modify The Transpiration Of Cereals, A. L. Bakker, H. H. Plagge 2017 Iowa State College

The Extent To Which Weeds Modify The Transpiration Of Cereals, A. L. Bakker, H. H. Plagge

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

This work on transpiration involved a study of the competition and the comparison of the growth of wheat, of wheat with mustard, of oats alone and oats with mustard. To determine the growth and development taking place in the various cultures, measurements were made at frequent intervals of the increases in leaf area and of the amount of water lost. The data clearly show that weeds require a large amount of water.

Comparing the pure and mixed cultures leaves no doubt but that a weed like mustard impairs the crop. The effect is evidenced in the fact that a culture ...


Collecting Cuphea, Sanvitalia And Zinnia In Mexico, Mark P. Widrlechner, William W. Roath, Roger G. Fuentes-Granados, Alvaro Campos 2017 United States Department of Agriculture

Collecting Cuphea, Sanvitalia And Zinnia In Mexico, Mark P. Widrlechner, William W. Roath, Roger G. Fuentes-Granados, Alvaro Campos

Mark P. Widrlechner

Cuphea, Sanvitalia and Zinnia germplasm collections are maintained by the North Central Regional Plant Introduction Station (NCRPIS), Ames, Iowa, as part of the National Plant Germplasm System of the United States. A cooperative project was established by the NCRPIS and the Botany Department of the Universidad Nacional Aut6noma de Mexico (UNAM), Mexico City, to organize a collecting trip for these genera. This report summarizes the reasons for, and initial products of, the resulting expedition.


Ultramafic Geocology Of South And Southeast Asia, Nishanta Rajakaruna, M. Galey, Van Der Ent, M. Iqbal 2017 Biological Sciences Department, California Polytechnic State University

Ultramafic Geocology Of South And Southeast Asia, Nishanta Rajakaruna, M. Galey, Van Der Ent, M. Iqbal

Faculty Publications

Globally, ultramafic outcrops are renowned for hosting floras with high levels of endemism, including plants with specialised adaptations such as nickel or manganese hyperaccumulation. Soils derived from ultramafic regoliths are generally nutrient-deficient, have major cation imbalances, and have concomitant high concentrations of potentially phytotoxic trace elements, especially nickel. The South and Southeast Asian region has the largest surface occurrences of ultramafic regoliths in the world, but the geoecology of these outcrops is still poorly studied despite severe conservation threats. Due to the paucity of systematic plant collections in many areas and the lack of georeferenced herbarium records and databased information ...


High Throughput In Vivo Analysis Of Plant Leaf Chemical Properties Using Hyperspectral Imaging, Piyush Pandey, Yufeng Ge, Vincent Stoerger, James C. Schnable 2017 University of Nebraska-Lincoln

High Throughput In Vivo Analysis Of Plant Leaf Chemical Properties Using Hyperspectral Imaging, Piyush Pandey, Yufeng Ge, Vincent Stoerger, James C. Schnable

Biological Systems Engineering--Dissertations, Theses, and Student Research

The possibility of predicting plant leaf chemical properties using hyperspectral images was studied. Sixty maize and 60 soybean plants were used, and two experiments were conducted: one with water limitation and the second with nutrient limitation, with the purpose of creating wide ranges of these chemical properties in plant leaf tissues. A hyperspectral imaging system with a spectral range from 550 to 1700 nm was used to acquire plant images in a high throughput fashion (plants placed on an automated conveyor belt). Leaf chemical properties were measured in the laboratory. Partial least squares regression was implemented on spectral data to ...


Environmental Influences On Nectar Secretion, Leslie Alva Kenoyer 2017 Iowa State College

Environmental Influences On Nectar Secretion, Leslie Alva Kenoyer

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

This study was undertaken to summarize and supplement existing knowledge of the factors which stimulate or retard the secretion of nectar. The work was carried out under the direction of the botany section of the Iowa Agricultural State Experiment Station in cooperation with the chemistry section, being done mostly at Ames, Iowa, from June, 1914, to June, 1916.


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