Browsing Plant Pathology by Issue Date
Now showing items 1-20 of 102
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Scanning Electron Microscope Examination of Sugarbeet Flowers and Fruits Infected with Phoma Betae
(North Dakota State University, 1980)There are three natural openings in a mature sugarbeet fruit which serve as avenues of entry for microorganisms: 1) the basal pore which contains dried parenchyma and vascular tissue and is the point where the flower was ... -
Pathogenic Variation, Host Specialization and Aggressiveness in Helminthosporium Sativum
(North Dakota State University, 1984)Common root rot, caused by Cochliobolus sativus, is an important disease of spring wheat and barley in the northern Great Plains. While the disease has been widely studied, extensive systematic investigation of pathological ... -
The Impact of Plant Age, Fungicide Application Methodology and Timing, and Depth of Soil Inoculation on Infection by Rhizoctonia solani on Sugarbeet.
(North Dakota State University, 2010)Rhizoctonia root rot caused by Rhizoctonia solani (Kuhn), is the most important problem faced by sugarbeet (Beta vulgaris L.) grm.vers in North Dakota and Minnesota. Research was conducted that may be used to manage the ... -
Association Mapping of Resistance to Common Root Rot and Spot Blotch in Barley, and Population Genetics of Coch/iobolus sativus
(North Dakota State University, 2010)Cochliobolus sativus (Ito & Kurib.) Drechsl. ex Dast. [anamorph, Bipolaris sorokiniana (Sacc. in Sorok.) Shoem.] is an important fungal pathogen, which causes common root rot (CRR), spot blotch (SB) and black point/kernel ... -
Studies on the Population Biology of Colletotrichum coccodes Using AFLP and SCAR Markers
(North Dakota State University, 2010)Black dot is a blemish disease of potato caused by the fungus Colletotrichum coccodes (Wallr.) Hughes. with worldwide distribution. It occurs in Africa, Asia, Australia, Europe, North America, South America, and Central ... -
Studies on the Biology of Soybean Cyst Nematode
(North Dakota State University, 2011)Soybean cyst nematode (SCN), Heterodera glycines, is a threat to soybean production in North Dakota. Studies on the biology of SCN were conducted to improve my understanding and management of this plant parasitic nematode. ... -
Prevalence of Pathogenicity Groups of the Blackleg Species Complex on Canola in North Dakota
(North Dakota State University, 2011)North Dakota is the leading producer of canola (Brassica napus) in the United States. Blackleg, caused by two species of Leptosphaeria, L. maculans (Desm.) Ces & De Not and L. biglobosa, is an economically important disease ... -
Screening of Germplasm Accessions from the Brassica Species for Resistance against PG3 and PG4 Isolates of Blackleg
(North Dakota State University, 2011)Blackleg is a disease of canola and rapeseed cultivars that is caused by the fungus Leptosphaeria maculans (Desm.) Ces. & de Not., and it is by far the most destructive pathogen of canola in North America. In recent years, ... -
Detection of Qol Fungicide Resistance and Genomic Analysis for Identification of Polyketide Synthases and Methyltransferases in Ascochyta rabiei
(North Dakota State University, 2011)Ascochyta blight is the most important disease of chickpeas in North America since the fungal pathogen Ascochyta rabiei was introduced to this region in 1986. Ascochyta blight epidemics can cause yield and economic losses ... -
Genomics and Management of Fusarium Root Rot of Field Peas
(North Dakota State University, 2012)Dry Pea or field pea (Pisum sativum L.) is an important cool season legume crop grown in the United States. Field peas are vulnerable to many diseases of which, soil borne diseases including wilt and root rot are of major ... -
Movement and Accumulation of Candidatus Liberibacter Solanacearum in Potato Plants
(North Dakota State University, 2012)A new disease affecting potatoes was first detected in Mexico in 1993. Affected plants had aerial symptoms similar to those caused by potato purple top and psyllid yellows, but tubers had internal brown discoloration when ... -
Inoculation Techniques, Development of Brassica Napus Breeding Lines and Identification of Markers Associated with Resistance to Sclerotinia Sclerotiorum (Lib.) De Bary
(North Dakota State University, 2012)Sclerotinia stem rot caused by Sclerotinia sclerotiorum (Lib.) de Bary is an economic disease affecting canola (Brassica napus L). Since expression of sclerotinia stem rot symptoms shows much variability and the trait is ... -
Biology and Development of Two Wilt Fungi of Potato: Verticilliam Dahliae and Colletotrichum Coccodes
(North Dakota State University, 2012)The demand for high quality tubers for the frozen processing industry has exerted increased pressure on producers to control diseases that can compromise tuber quality, including, C. coccodes and V. dahliae. Infection of ... -
Characterization of Cytochrome B from European Field Isolates of Cercospora Beticola with Quinone Outside Inhibitor Resistance
(North Dakota State University, 2012)Cercospora leaf spot (CLS), caused by the fungal pathogen Cercospora beticola, is the most important foliar disease of sugar beet worldwide. Control strategies for CLS rely heavily on fungicides including quinone outside ... -
Developing Management Tools for Sunflower Rust (Puccinia Helianthi)
(North Dakota State University, 2013)Sunflower rust, caused by Puccinia helianthi (Schwein), is an economically important disease in North Dakota. Since 2008, sunflower rust incidence and severity have increased. Therefore, a four year study was initiated to ... -
Understanding and Managing Rhizoctonia Solani in Sugarbeet
(North Dakota State University, 2013)Rhizoctonia crown and root rot of sugarbeet (Beta vulgaris L.) caused by Rhizoctonia solani Kühn is one of the most important production problems in Minnesota and North Dakota. Greenhouse studies were conducted to determine ... -
Genetic Structure of Leptosphaeria Maculans Populations in North Dakota and Identification of Genes Associated with Resistance to L. Maculans in Brassica Juncea
(North Dakota State University, 2013)Blackleg, caused by Leptosphaeria maculans is one of the most devastating diseases of canola (Brassica napus) in North Dakota. A study was conducted to characterize prevalence of pathogenicity groups (PG), identify population ... -
Characteristics and Host Range of a Novel Fusarium Species Causing Yellowing Decline of Sugarbeet
(North Dakota State University, 2013)In 2008, a novel and distinct Fusarium species was reported in west central Minnesota causing early-season yellowing and severe decline of sugarbeet. This study was conducted to (i) establish optimum conditions for fungal ... -
Comparative Population Genetics of Fusarium Graminearum and Novel Sources of Resistance to Fusarium Head Blight in Spring Wheat
(North Dakota State University, 2013)Fusarium graminearum is the major causal agent of Fusarium head blight (FHB) in cereal crops. The fungus produces several types of trichothecenes [Deoxynivalenol (DON) and its acetylated derivatives, 3-acetyldeoxynivalenol ... -
Characterization of Sensitivity of Sclerotinia Sclerotiorum Isolates from North Central U.S. to Thiophanate-Methyl and Metconazole
(North Dakota State University, 2013)Sclerotinia sclerotiorum (Lib.) de Bary causes Sclerotinia stem rot on canola and many other crops of economic importance in the U.S. SSR is primarily controlled with fungicides applied at flowering time. Most fungicides ...