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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 ...


Wheat Production, Gretchen Sassenrath, D. E. Shoup, R. Lollato 2017 Kansas State University

Wheat Production, Gretchen Sassenrath, D. E. Shoup, R. Lollato

Kansas Agricultural Experiment Station Research Reports

Wheat production in southeast Kansas is often limited due to high rainfall during the harvest. In some years, this high rainfall can exacerbate disease pressure, especially fungal infections. This study presents results from a test of fungicide applications to control Fusarium head blight (FHB) or scab in poor quality wheat.


Cover Crop System To Control Charcoal Rot In Soybeans, Gretchen Sassenrath, C. R. Little, C. J. Hsiao, D. E. Shoup, X. Lin 2017 Kansas State University

Cover Crop System To Control Charcoal Rot In Soybeans, Gretchen Sassenrath, C. R. Little, C. J. Hsiao, D. E. Shoup, X. Lin

Kansas Agricultural Experiment Station Research Reports

This research compares methods of controlling charcoal rot in soybean cultivars from three maturity groups commonly grown in southeast Kansas. The results indicate that a mustard plant that produces high levels of glucosinolates can be used as a cover crop to reduce the charcoal rot disease in soybeans.


Evaluation Of Tall Fescue Cultivars, J. L. Moyer 2017 Kansas State University

Evaluation Of Tall Fescue Cultivars, J. L. Moyer

Kansas Agricultural Experiment Station Research Reports

Spring 2016 yield of tall fescue was higher for ‘NFTF 1051’ than for 12 of the 19 other cultivar entries. Summer production of ‘PBU-B2’ was greater than summer production of the three lower-yielding entries. Fall production of ‘BarOptima PLUS E34’ was higher than that of 12 other cultivar entries, but total 2016 production was greater for PBU-B2, ‘PBU-B7’, and NFTF 1051 than for eight other cultivars.


Basisporium Dry Rot Of Corn, L. W. Durrell 2017 Iowa State College

Basisporium Dry Rot Of Corn, L. W. Durrell

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Basisporium gallarum was first found on corn from Bulgaria in 1911 by Bubak and by Arzberger in Ohio in 1913. Coniosporium gecevi Bubak is identical with Basisporium gallarum Moll. The common name of Basisporium dry rot is suggested for the disease caused by this organism.

The dry rot of corn, caused by this fungus, was very prevalent in Iowa in 1923, causing an average damage to the crop of 9.1 percent, while in a few fields from 50 to 60 percent of the ears were infected. The damage consists of moldy and light ears, reduced stand and weak plants ...


Transmissibility And Pathological Effects Of The Mosaic Disease, O. H. Elmer 2017 Iowa State College

Transmissibility And Pathological Effects Of The Mosaic Disease, O. H. Elmer

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The investigations reported in this publication deal chiefly with the question of the transmissibility of mosaic disease, both artificially and thru the use of certain insect vectors. Another portion of the report deals with studies which have been made concerning the pathological effect of mosaic in plants and its relation to environmental conditions.


Dry Rot Of Corn, L. W. Durrell 2017 Iowa State College

Dry Rot Of Corn, L. W. Durrell

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The study of the dry rot disease of corn caused by Diplodia zeae shows it to be a prevalent disease in Iowa, resulting in losses, the past two seasons, ranging from 3 to 15 percent of the ears at harvest and a 11 percent damage to the seed corn. The loss in stand from diseased seed in many fields a mounted to 15 percent. A still further loss results from nodal infection and weak plants grown from slightly infected seed.


Alternate Hosts And Biologic Specialization Of Crown Rust In America, I. E. Melhus, S. M. Dietz, Florence Willey 2017 Iowa State College

Alternate Hosts And Biologic Specialization Of Crown Rust In America, I. E. Melhus, S. M. Dietz, Florence Willey

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

became necessary to consider its alternate hosts and biologic specialization. Altho these phases have received extensive investigation in Europe by de Bary, Eriksson, Klebahn, and others, yet they have scarcely been considered in America. On purely theoretical grounds, it would be unusual to expect the same conditions to exist in America, where there are different species of Rhamnus and grasses, as well as different climatic and environmental conditions. In fact, enough work has already been done by Carleton, Arthur, and Melhus and Durrell, on the relation of crown rust to Rhamnus and on biologic specialization, to indicate clearly that the ...


A Study Of The Control Of Crown Gall On Apple Grafts In The Nursery, I. E. Melhus, T. J. Maney 2017 Iowa State College

A Study Of The Control Of Crown Gall On Apple Grafts In The Nursery, I. E. Melhus, T. J. Maney

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Altho crown gall is one of the most serious diseases of apple trees in the nursery, effective control measures for root-grafted stock have not yet been found. This is doubtless due to previous lack of definite knowledge of the causal agent. Now, due to the excellent work of Erwin F. Smith and C. D. Townsend, Bacteriurn turnefaciens, Sm. and Tw., has been shown to cause this disease. Later, Smith, Brown and Townsend contributed many other important facts pertaining to the pathogenicity and biology of the organism. As a result of these studies, experiments on control measures have been made possible ...


The Comparative Resistance Of Varieties Of Oats To Crown And Stem Rusts, L. W. Durrell, John H. Parker 2017 Iowa State College

The Comparative Resistance Of Varieties Of Oats To Crown And Stem Rusts, L. W. Durrell, John H. Parker

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Numerous instances of the production of disease-resistant crops may be noted in this and other countries, but comparatively little work has been done on the problem of resistance of oats to stem rust (Puccinia grarninis Pel's.) and crown rust (P. coronata Corda.) Many of the published records on the rust resistance of oats are observations covering but a single season and too often with no determination of the species of rust present. The use of resistant varieties, however, appears . to be the most hopeful method of combating these rusts. This paper is chiefly an account of studies conducted to ...


Detecting, Cloning, And Screening For Suppressors Of Rna Silencing In Maize Chlorotic Mottle Virus And Sugarcane Mosaic Virus, Nicole E. Bacheller 2017 University of Nebraska-Lincoln

Detecting, Cloning, And Screening For Suppressors Of Rna Silencing In Maize Chlorotic Mottle Virus And Sugarcane Mosaic Virus, Nicole E. Bacheller

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Maize lethal necrosis disease (MLND) is one of the most important viral diseases of maize. MLND occurs when Maize chlorotic mottle virus (MCMV) co-infects the same plant with one of several potyviruses, including Sugarcane mosaic virus, Wheat streak mosaic virus or Maize dwarf mosaic virus. Originally prevalent in the Midwest and Peru in the 1970s, the disease was called corn lethal necrosis (CLN) and was controlled through breeding and sanitation. Recently, the disease has re-emerged in East Africa and is rapidly spreading and threatening the food sources of subsistence-farming populations. This re-emergence has raised several questions about the unknown molecular ...


The Fungicidal Action Of Formaldehyde, I. E. Melhus, J. C. Gilman, J. B. Kendrick 2017 Iowa State College

The Fungicidal Action Of Formaldehyde, I. E. Melhus, J. C. Gilman, J. B. Kendrick

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

'rhe work presented in this bulletin attempts to open up this field of investigation and supply data bearing on the toxic action of formaldehyde and the influence thereon of concentration of the solution, of temperature of treatment and of duration of exposure. The data is limited to two organisms, Actinomyces scabies and Rhizocttpmoia solani, as they occur on the surfaces of potato tubers. Both laboratory and field work were carried on, altho the latter was limited due to the time required to get results and the non-controlled external factors which influence such results.


Relation Of The Barberry To Stem Rust In Iowa, I. E. Melhus, L. W. Durrell, R. S. Kirby 2017 Iowa State College

Relation Of The Barberry To Stem Rust In Iowa, I. E. Melhus, L. W. Durrell, R. S. Kirby

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

It has been definitely known since 1865 that the European barberry is the alternate host of stem rust (Puccinia graminis); yet the exact relation of this shrub to the annual appearance of stem rust of our grains and grasses is not well understood. Tulasne brothers (18) (1847), de Bary (1) (1865) and others rarely described and figured the morphology of teleutosporic germination. They gave little consideration, however, to the questions as to what environmental conditions influence such germination and the production, dissemination, viability and growth of the sporidia—conditions that have a fundamental bearing on serious attacks of stem rust.


The Effect Of Crown Gall Upon A Young Apple Orchard, Laurenz Greene, I. E. Melhus 2017 Iowa State College

The Effect Of Crown Gall Upon A Young Apple Orchard, Laurenz Greene, I. E. Melhus

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

This bulletin contains a record of progress in a study of the effect of crown gall upon an apple orchard from the time it is set out until it becomes of bearing age. The relative influence of various types of galls upon the annual growth of the trees has been considered and some data have been gathered on the amount and position of the galls in relation to the growth and percentage of stand in the orchard. Also, the susceptibility of certain kinds of apple trees to crown gall after they have been planted in the orchard, and the persistence ...


Studies On The Crown Rust Of Oats, I. E. Melhus, L. W. Durrell 2017 Iowa State College

Studies On The Crown Rust Of Oats, I. E. Melhus, L. W. Durrell

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

During some seasons crown rust of oats (Puccinia coronata Corda) becomes a serious limiting factor in successful oat production in Iowa. It is not uncommon to have this rust occur in epidemic form one year and the following year to have only a small amount of the disease present. Up to the present time the various factors which influence the growth, development and epidemiology of this rust have not been definitely studied.


Studies On A Fusarium Disease Of Corn And Sorghum (Preliminary), L. H. Pammel, C. M. King, J. L. Seal 2017 Iowa State College

Studies On A Fusarium Disease Of Corn And Sorghum (Preliminary), L. H. Pammel, C. M. King, J. L. Seal

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

A new fusarium disease of corn made its appearance in Iowa, during the season of 1914, seriously injuring the corn crop 01' the state and causing a loss estimated at more than $15,000,000. It was not confined to Iowa, for reports of a similar disease were sent to the Iowa Agricultural Experiment station by H. B. Clark of Blair, Neb., who found an abundance of it there and elsewhere in that state. One of the authors observed the fusarium that same season in western I Illinois and northern Missouri and Dr. E. C. Stakman reported that it occurred ...


Towards The Development Of A Sustainable Soya Bean-Based Feedstock For Aquaculture, Hyunwoo Park, Steven Weier, Fareha Razvi, Pamela A. Peña, Neil A. Sims, Jennica Lowell, Cory Hungate, Karma Kissinger, Gavin Key, Paul Fraser, Jonathan Napier, Edgar B. Cahoon, Thomas Clemente 2017 University of Nebraska-Lincoln

Towards The Development Of A Sustainable Soya Bean-Based Feedstock For Aquaculture, Hyunwoo Park, Steven Weier, Fareha Razvi, Pamela A. Peña, Neil A. Sims, Jennica Lowell, Cory Hungate, Karma Kissinger, Gavin Key, Paul Fraser, Jonathan Napier, Edgar B. Cahoon, Thomas Clemente

Faculty Publications from the Center for Plant Science Innovation

Soya bean (Glycine max (L.) Merr.) is sought after for both its oil and protein components. Genetic approaches to add value to either component are ongoing efforts in soya bean breeding and molecular biology programmes. The former is the primary vegetable oil consumed in the world. Hence, its primary usage is in direct human consumption. As a means to increase its utility in feed applications, thereby expanding the market of soya bean coproducts, we investigated the simultaneous displacement of marine ingredients in aquafeeds with soya bean-based protein and a high Omega-3 fatty acid soya bean oil, enriched with alpha-linolenic and ...


Last County In Iowa Found Infested With Scn, Greg Tylka, Brian Lang 2017 Iowa State University

Last County In Iowa Found Infested With Scn, Greg Tylka, Brian Lang

Integrated Crop Management News

More than 100 fields throughout Iowa were surveyed for the presence of the soybean cyst nematode (SCN) in 2016 in a project sponsored by the ISU Soybean Research Center and the Iowa Soybean Association (ISA). Soil samples were collected by Iowa State University Extension and Outreach field agronomists and ISA staff and interns and sent to the ISU Plant and Insect Diagnostic Clinic for processing.


Supplemental Data, Russell J. Ingram, Foster Levy, Cindy L. Barrett, James T. Donaldson 2017 University of Georgia

Supplemental Data, Russell J. Ingram, Foster Levy, Cindy L. Barrett, James T. Donaldson

ETSU Faculty Works

No abstract provided.


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