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Effects of Mycofumigation Using Muscodor albus and Muscodor roseus on Diseases of Sugar Beet and Chrysanthemum: Author: Grimme, Eva; Date: 2004-08-15; Program: Plant Pathology; Abstract: Methyl bromide-chloropicrin mixtures are the major chemicals used for soil disinfestation in the U.S. These chemicals are highly efficacious fumigants used for prePlant soil fumigation in field and greenhouse production. They control soil-borne diseases, insects, nematodes and weeds. The 1996 International agreement to phase-out methyl bromide for soil fumigation will seriously reduce options for controlling soilborne pathogens. Mycofumigation is the use of antimicrobial volatiles produced by fungi such as Muscodor albus and Muscodor roseus for the control of other microorganisms. A synthetic ...; Download File | View full details

Integrated Management of Cercospora Leaf Spot on Sugar Beet: Author: Larson, Ben James; Date: 2004-05-15; Program: Plant Pathology; Abstract: Cercospora leaf spot (CLS), caused by Cercospora beticola, is the most important foliar disease of sugar beets in Montana. Losses in research plots ranging from 5-15 metric tons per hectare and 0.5-1.5% lower sugar in the last 7 years. Increased levels of storage rot, sugar impurities, and loss of sugar to molasses have also contributed to losses. Current management strategies are heavily dependent upon the application of a few registered fungicides. Continued use of these fungicides is threatened by registration removal through the Food Quality Protection Act of 1996, and the development of f...; Download File | View full details

Transformation of Barley (Hordeum vulgare) using the Wheat Puroindoline Gene: Author: Odake, Yusuke; Date: 2004-08-15; Program: Plant Pathology; Abstract: Feed and malting barley are major crops in Montana. Harrington, a two-rowed spring malting barley variety, is the most cultivated variety in the state. Barley was the last of the world's major cereals for which transformation methods were developed because in vitro-cultured barley rapidly loses regeneration ability or gives rise to albino Plants during selection for transformed tissue. Previous research used the variety Golden Promise because it regenerates well under research conditions, though it is not commercially used. Transformation could be an important method to improve varieties in No...; Download File | View full details

Cultivar Susceptibility and Fungicide Control of Black Dot Root Rot: Author: Meyer, Jack Robert; Date: 2007-05-15; Program: Plant Pathology; Abstract: Black Dot (Colletotrichum coccodes) is an important potato disease worldwide causing reported yield losses in the 10-30% range. It is involved in the early dying disease complex along with Verticillium dahliae or V. albo atrum, and root lesion nematodes. Besides early dying, black dot also causes silvery blemishes on the tuber surface that resemble those of silver scurf which results in reduced value in fresh markets. The purpose of this work was to evaluate North American cultivars for black dot tolerance and to evaluate fungicides for their efficacy in controlling this disease. To evaluate c...; Download File | View full details

Discovery and Distribution of Root Lesion Nematode, Pratylenchus neglectus, in Montana: Author: Johnson, Wendy Ann; Date: 2007-12-15; Program: Plant Pathology; Abstract: Root lesion nematodes (Pratylenchus neglectus and P. thornei) cause significant yield losses for wheat worldwide. To assess the prevalence of root lesion nematodes in Montana, soil samples were collected statewide in 2006 and 2007. In 2006, P. neglectus was found in 12 of the 17 counties and in 41% of all field samples surveyed. In 2007, P. neglectus was found in 11 of 15 counties and in 37% of all field samples surveyed. No P. thornei was found. For fields having root lesion nematode in 2006, P. neglectus mean population densities were 1213 nematodes/kg soil with population densities exceedin...; Download File | View full details

Bacterial Wilt Management: A Prerequisite for a Potato Seed Certification Program in Mali: Author: Thera, Aissata Traore; Date: 2007-12-15; Program: Plant Pathology; Abstract: Potato is one of the most important cash crops in Mali and has been well adapted to the Malian cropping systems and food habit. Bacterial wilt caused by Ralstonia solanacearum (Smith) Yabuuchi et al., (1995) has become a major problem causing important damage in production. The Race and biovar of the bacterium present in Mali were not known at the start of this thesis research and the objective of this research was to identify the race/biovar and to evaluate integrated control methods with the aim to produce high quality disease free seed potato in Mali. We have initially identified the biovar...; Download File | View full details

Integrated management and causes of damping off disease of chickpea (Cicer arietinum L.) in Montana: Author: Leisso, Rachel Sue; Date: 2008-08-15; Program: Plant Pathology; Abstract: Chickpea is a minor crop in Montana with great potential for increase in both the conventional and organic sector. The semi-arid climate of much of Montana is well-suited to organic chickpea production, which commands a higher market price than conventional chickpea. Ranking third in the nation for certified organic cropland acres, many operations in Montana are already capable of organic chickpea production. There is a need for rotational crops such as chickpea that are compatible with organic wheat production. In addition to their profit potential, chickpea can perform valuable functions in ...; Download File | View full details