Browsing Plant Pathology Masters Theses by Issue Date
Now showing items 21-40 of 49
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Evaluation of Genetic Resistance to Common Bacterial Blight in Dry Edible Bean
(North Dakota State University, 2015)Common bacterial blight (CBB) is an economically important disease of dry bean worldwide caused by Xanthomonas axonopodis pv. phaseoli, (Xap). The objectives of this research were to determine the frequency of CBB resistance ... -
Identification and Genomic Mapping of Resistance to Bacterial Leaf Streak in Wheat
(North Dakota State University, 2015)Bacterial leaf streak (BLS) of wheat, caused by Xanthomonas translucens pv. undulosa, is an important disease of wheat worldwide. Use of resistant cultivars is the most preferred way of managing BLS. The objective of this ... -
Genetic Mapping of Quantitative Trait Loci for Resistance to Wheat Tan Spot Using Two Bi-Parental Populations
(North Dakota State University, 2015)Tan spot, caused by Pyrenophora tritici-repentis (Ptr), is an economically important disease on both common wheat (Triticum aestivum L.) and durum (T. turgidum L. ssp. durum). Genetics of resistance to tan spot is complicated ... -
Rhizoctonia Solani Damping-Off of Sugarbeet: Effect of Plant Growth Stage on Disease Severity and Management Using Penthiopyrad
(North Dakota State University, 2015)Rhizoctonia solani is the most damaging pathogen on sugarbeet (Beta vulgaris L.) in North Dakota and Minnesota. Research was conducted to evaluate penthiopyrad for controlling R. solani and determine when the plants are ... -
Sensitivity of Sclerotinia Sclerotiorum Isolates From North Central US to Azoxystrobin and Boscalid
(North Dakota State University, 2016)Azoxystrobin and boscalid are fungicides frequently used to manage diseases caused by Sclerotinia sclerotiorum (Lib.) de Bary in many broadleaf crops in North Central US. . Continued use of these compounds can induce ... -
The Effect of Substitution of Cytoplasmic Organelles on the Responses of Wheat to Foliar Pathogens
(North Dakota State University, 2016)Parastagonospora nodorum and Pyrenophora tritici-repentis are foliar pathogens of wheat, capable of causing up to 50% yield losses, and reduced grain quantity and quality, by infecting wheat leaves and kernels. The most ... -
Biology and Management of Fusarium Species on Sugar Beet
(North Dakota State University, 2017)Minnesota and North Dakota together produce about 51% of the beet sugar in the United States of America. Fusarium diseases caused by Fusarium oxysporum f. sp. betae and F. secorum on sugar beet cause significant reduction ... -
Augmenting Fungicidal Activity of Tetraconazole with Chemosensitization Agents for Cercospora Leaf Spot Management
(North Dakota State University, 2017)Cercospora beticola (Sacc.) is the causal agent of Cercospora leaf spot (CLS). CLS is considered to be one of the most destructive foliar diseases of sugar beet in the world. CLS is managed in part through resistant ... -
Evaluation of Field Pea Varieties for Resistance to Fusarium Root Rot Pathogens
(North Dakota State University, 2017)Fusarium root rot is one of the most important diseases of pulse crops, with numerous Fusarium spp. comprising the disease complex. Fusarium solani and F. avenaceum have been reported to be major pathogens in the pea root ... -
Genetics of the Host-Pathogen Interaction in the Barley-Net Form Net Blotch System
(North Dakota State University, 2017)Pyrenophora teres f. teres is a fungal pathogen that causes barley net form net blotch. To evaluate the genetics of resistance in barley, a RIL population was developed using resistant barley lines CI5791 and Tifang and ... -
Efficacy of Seed Treatments and In-Furrow Fungicides for Management of Dry Bean Root Rot Caused by Rhizoctonia Solani and Fusarium Solani, and Field Pea Root Rot Caused by Fusarium Avenaceum and Fusarium Solani
(North Dakota State University, 2017)Dry bean and field pea root rots have resulted in substantial yield losses in North Dakota. Root rot symptoms range from small lesions to complete root destruction. Traditional management practices such as seed treatment ... -
Downy Mildew of Sunflowers: Establishment of Baseline Sensitivity to Azoxystrobin and Monitoring for the Development of Fungicide Resistance and Plasmopara Halstedii Virulence Phenotype Changes
(North Dakota State University, 2017)Downy mildew, caused by Plasmopara halstedii (Farl.) Berl. and de Toni, is an economically important disease in cultivated sunflowers, Helianthus annuus L. The objectives of this study were to determine disease pressure ... -
Genetic Mapping of Resistance to Bacterial Leaf Streak in Triticale
(North Dakota State University, 2017)Bacterial leaf streak (BLS), caused by Xanthomonas translucens pv. undulosa (Xtu), is an important disease of wheat worldwide. The best way to control this disease in the field is the use of resistant cultivars. Although ... -
Revisiting Management Practices for Diseases of Spring Barley in North Dakota
(North Dakota State University, 2018)Common barley diseases observed in North Dakota include net blotch, spot blotch, leaf and stripe rust, bacterial leaf streak, and Fusarium head blight. The first objective of this research was to determine the effect of ... -
Expression Analysis of the Expanded Cercosporin Gene Cluster in Cercospora beticola
(North Dakota State University, 2018)Cercospora leaf spot is an economically devastating disease of sugar beet caused by the fungus Cercospora beticola. It has been demonstrated recently that the C. beticola CTB cluster is larger than previously recognized ... -
Identification of Quantitative Trait Loci for Resistance to Tan Spot in Durum Wheat
(North Dakota State University, 2018)Tan spot, caused by Pyrenophora tritici-repentis (Ptr), is a major foliar disease on wheat. The pathosystem involves three pairs of necrotrophic effector (NE) and host sensitivity (S) gene interactions, namely Ptr ToxA-Tsn1, ... -
Plant-Parasitic Nematodes in Field Pea and Potato and their Effect on Plant Growth and Yield
(North Dakota State University, 2018)In this study, surveys were conducted in pea and potato fields in North Dakota and Central Minnesota to investigate the incidence and abundance of plant-parasitic nematodes in these fields. Moreover, the effect of the pin ... -
Assessing Cereal Aphid Diversity and Barley Yellow Dwarf Risk In Hard Red Spring Wheat and Durum
(North Dakota State University, 2018)Barley yellow dwarf (BYD), caused by Barley yellow dwarf virus and Cereal yellow dwarf virus, and is a yield limiting disease of small grains. A research study was initiated in 2015 to identify the implications of BYD on ... -
Plant-Parasitic Nematodes on Sugarbeet in North Dakota and Minnesota
(North Dakota State University, 2019)Field surveys were conducted in the Red River Valley (RRV) of North Dakota and Minnesota during 2016 and 2017 to determine the incidence, abundance, and distribution of plant-parasitic nematodes (PPNs) on sugarbeet. ... -
Inoculation and Spread of Dickeya in Potatoes
(North Dakota State University, 2019)Field experiments were conducted in two different growing environments to evaluate the spread and movement of Dickeya dadantii. A procedure to inoculate seed potatoes with Dickeya dadantii was developed to use during this ...