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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"Leaf blight"”.
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Resistance to anthracnose leaf blight in sorghum
… and soil. There are three forms of the disease: leaf blight, stalk rot, and panicle and grain rot. Anthracnose leaf blight is usually encountered 30-40 days after planting and is responsible for most of the yield loss. Common anthracnose leaf blight symptoms in sorghum include chlorotic flecks on …
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Status of Northen Leaf Blight, Phaeosphaeria maydis Leaf Spot, Southern Leaf Blight, Rust, Maize Streak Virus and Physiologic Specialization of Exserohilum turcicum in Kenya
… zones. Exserohilum turcicum - induced blight was observed in all maize producing areas with disease incidence reaching over 45%. Lesions were sometimes over 400 mm long by 25 mm in width. Southern leaf blight caused by Bipolaris maydis was most severe in the Kenyan maize granary located …
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Goss’s wilt and leaf blight of corn: chemical control, residue management and resistance
Goss’s wilt and leaf blight of corn has been a re-emerging disease in the United States. Caused by the bacterium Clavibacter michiganensis subsp. nebraskensis (Cmn), Goss’s wilt has been increasing in Illinois due to factors that include continuous maize rotations, reduced tillage which increases …
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Epidemiological Studies of Northern Corn Leaf Blight on Corn Inbreds: Loss Assessment and Disease Modeling
… to detasseling and disease. Northern corn left blight (NCLB), caused by Exserohilum turcicum, an important disease of maize, has provided a model system for evaluating the relationships between disease and components of yields of inbreds. The effects on yields of two detasseling methods and the …
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Gene Action Conditioning Quantitative Resistance to Northern Leaf Blight in Four Australian Corn Inbred Lines
Made available in DSpace on 2014-12-09T18:06:30Z (GMT). No. of bitstreams: 1 6910731.pdf: 2894612 bytes, checksum: 23852b89460c869f2002a4fff0f66fde (MD5) Previous issue date: 1968
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Alternaria Leaf Blight and Head Rot of Broccoli: UAV-Based Disease Detection and Fungicide Resistance Management
Alternaria leaf blight and head rot (ABHR) of brassicas significantly impacts yield, threatening the sustainability of the broccoli industry. Management traditionally relies on quinone outside inhibitor (QoI) fungicides, but recent reports indicate reduced efficacy. The causes for this decline are …
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Effect of Resistance Type on the Development of and Yield Losses Due to Northern Corn Leaf Blight
… of resistant type on the development of northern leaf blight (NLB), caused by Exserohilum turcicum, was studied on three dent corn (Zea mays L.) hybrids: A619 x A632, B73 x Oh545 and Mo17 x B73. Two nearly isogenic versions of each hybrid were used, one version carrying the resistance gene Ht1 and …
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Epidemiology of Northern Corn Leaf Blight as Affected by Host Resistance and Yield Losses Following Simulated Epidemics
Made available in DSpace on 2014-12-14T04:37:45Z (GMT). No. of bitstreams: 1 7913585.pdf: 3893794 bytes, checksum: f0b34bd5bb51b161b42f25ea899dfd31 (MD5) Previous issue date: 1978
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Soybean disease research on green stem disorder, effects of seed treatments on Sclerotinia stem rot, and resistance to Cercospora leaf blight
… to plants at later growth stages. Cercospora leaf blight (CLB) and purple seed stain (PSS) caused by Cercospora kikuchii are important diseases of soybean worldwide. While there are no commercially available cultivars advertised for resistance to PSS or CLB, sources of resistance have been …
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Evaluation of race population distribution, fungicide sensitivity, and fungicide control of Exserohilum turcicum, the causal agent of northern leaf blight of corn
Northern leaf blight (NLB) of corn, caused by Exserohilum turcicum, is a yield reducing foliar disease common across the north central U.S. Previous race population distribution studies identified five physiological races present in the U.S., prior to 1995. For this study, 156 E. turcicum isolates …
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Incorporation of Exotic Germplasm Into Adapted Maize Synthetics to Improve Grain Yield and Multiple Leaf Blight Resistance (Selection Response, Zea Mays, Quantitative Genetics, Corn)
… se were evaluated for grain yield and aggregate leaf disease resistance. One cycle of divergent S(,1) family selection for each trait was conducted in the adapted, BC(,1)F(,2), F(,2), and exotic populations for three sets of crosses. Several suggested estimators of favorable alleles (i.e. …
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Genetic architecture of multiple disease resistance in one maize chromosome segment substitution line population
… fungal and bacterial resistance. Bacterial leaf streak (BLS) is a foliar disease of maize caused by Xanthomonas vasicola pv. vasculorum. Since the first report of BLS in the United States in 2014, this disease has spread all over the Midwestern corn belt. Little is known about the disease …
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Identifying loci conferring quantitative disease resistance in sorghum and maize against fungal foliar pathogens
… to a variety of diseases. Northern corn leaf blight and sorghum leaf blight are both caused by the hemibiotrophic fungus Exserohilum turcicum. Both qualitative and quantitative resistance against E. turcicum have been described in maize. In contrast, the genetic architecture of resistance …
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The Genetic Architecture Of Quantitative Disease Resistance In Maize
… of maize (Zea mays L. ssp. mays), northern leaf blight (NLB, caused by Setosphaeria turcica L. anamorph Exserohilum turcicum). The maize nested association mapping (NAM) population, a reference design population consisting of 4,630 recombinant inbred lines, was evaluated over three …
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Sources and Inheritance of Resistance to Anthracnose Stalk Rot of Corn
… in the Midwest. In recent years anthracnose leaf blight and stalk rot, caused by Colletotrichum graminicola, have increased in prevalane in the warmer, humid corn-growing regions of the U.S. Recent evidence shows a great potential for anthracnose stalk rot to cause yield losses. Host genetic …
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A study of Bacillus aroideae, Townsend, the cause of a soft rot of tomato, and B. carotovorus Jones
… were designated to study the control of septoria leaf blight, and the soft rot of the fruit developed into an important factor. In describing these experiments Fromme (2) states: "Practically all of the unsoundness of the fruit was caused by bacterial soft rot, a disease which is exceedingly …
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Characteristics of biological control agents and their antagonism against rice pathogens and pests
… loss such as rice root-knot nematodes, bacterial leaf blight, and brown planthopper. Currently, pesticide use is the dominant practice for pest and disease management in Asian rice farming. The use of beneficial microbial agents for the control of pathogens and pests is a potential tool to sustain …
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Interactions between oxidative stresses in corn
… brown spot (Physoderma maydis), northern leaf blight (Exserohilum turcicum), and gray leaf spot (Cercospora zeae-maydis). Within a growing season disease severity was highly genotype-dependent; however, there were modest genotype-independent ozone effects, mostly significant under …
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Studies on sweet corn: Stewart's wilt forecasting, the effect of maize dwarf mosaic on foliar diseases, and herbicide sensitivity
… of five diseases including: southern corn leaf blight (SCLB), northern corn leaf spot (NCLS), gray leaf spot (GLS), Diplodia leaf streak (DLS), and eyespot. Among MDM-susceptible hybrids, mean severity ratings of SCLB, NCLS, GLS, DLS, and eyespot on MDM-infected plants typically were double …
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