Global ETD Search
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 11 of 11 for “"Ascospore"”.
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PREDICTING POTENTIAL ASCOSPORE DOSE OF VENTURIA INAEQUALIS (CKE) WINT IN COMMERCIAL APPLE ORCHARDS OF NEW HAMPSHIRE (MODELING, EPIDEMIOLOGY, DISEASE MANAGEMENT)
… affecting the number of Venturia inaequalis ascospores per m('2) orchard floor per season (PAD) in New Hampshire apple orchards. PAD was calculated as the product of scab lesions per m('2) leaf tissue at leaf fall, pseudothecia per lesion, asci per pseudothecium, the proportion of the orchard …
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Impact of Meteorological Conditions and Maturity of Perithecia on the Release of Fusarium graminearum Ascospores
… the fungal plant pathogen Fusarium graminearum. Ascospores of the fungus are released from perithecia on the residues of corn and small grains and can be transported long distances (>500 m) through the atmosphere. The overall objective of this work was to assess the influence of meteorological …
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DISPERSAL GRADIENTS AND DEPOSITION EFFICIENCY OF VENTURIA INAEQUALIS ASCOSPORES AND THEIR RELATIONSHIP TO LESION DENSITIES (APPLE SCAB DISEASE, SPORE DISPERSAL, TRAPPING)
<p>The airborne dispersal of Venturia inaequalis ascospores and Lycopodium sp spores from a point source was examined in an apple orchard. Twenty-five volumetric spore traps were constructed, and a system developed that governed intervals of trap operation by leaf wetness. The estimated inoculum …
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Herstellung von Antikörpern gegen Venturia inaequalis zur Entwicklung von Biosensoren
… on the prevention of primary infection by ascospores in the spring. As there is a demand for highly specific and realtime monitoring of the ascospore discharge, the development of a specific bionsensor was launched. The major objective of this thesis was the generation of ascospore-specific …
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Confocal and light microscopy of infection by, and resistance to, Ciborinia camelliae in Camellia species and the potential for biocontrol : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Plant Science (Plant Pathology) at Massey University, Palmerston North, New Zealand
In this thesis, factors affecting C. camelliae ascospore germination, germ tube penetration, infection and subsequent disease development and resistance in Camellia species were studied in detached camellia petals by microscopy. Potential biocontrol agents were also isolated and evaluated against …
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Epidemiological studies on primary inoculum of Venturia inaequalis and V. asperata for apple scab management
… days, ii) to understand the aerial dispersal of ascospores with the under-canopy irrigation, and iii) to identify the conditions of maturation of pseudothecia and ascospore discharge of V. asperata. The effect of irrigation was evaluated comparing irrigated and non-irrigated leaf litter. …
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Breeding for resistance to clover rot (Sclerotinia spp.) in red clover breeding (Trifolium pratense)
… developed for Sclerotinia on red clover. First, ascospore production for S. trifoliorum was optimised. A high-throughput bio-test was optimised: young plants are inoculated a with suspension of ascospores or mycelium fragments and incubated on an ebb and flow table covered with an opaque plastic …
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FACTORS INFLUENCING A PETAL-BASED FORECASTING SYSTEM FOR SCLEROTINIA STEM ROT OF CANOLA
… probably resulted from periodicity in ascospore discharge related to several environmental factors. Long-term fluctuations of up to 94% petal infestation were observed during flowering. These changes were mostly increases; however, in 1989, infestation generally decreased during …
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Synthetic Studies towards Opaliferin, a Tetracyclic Polyketide Metabolite
… in 2014. The fungus Cordyceps sp. is a single ascospore isolated from a fruiting body found on the larvae of Meimuna opalifera also known as Walker’s cicada. Opaliferin (12) possesses interesting structural features, which are a 5,5-spiroketal centre, and a functionalised THF ring connected by …
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The chemotaxonomy of the fungal genus Endothia fr.
… <i>Cryphonectria</i>, based on differences in ascospore shape and septation, stromatic configuration and distribution of stromatic tissues. This group of fungi traditionally contains some important plant pathogens; its taxonomic position needs to be resolved. The morphological criteria used by …
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Isolation von Ascosporen des pflanzenpathogenen Pilzes Venturia inaequalis und Charakterisierung von Antikörperinteraktionen zur Entwicklung eines immunogravimetrischen Sensors
… was the development of a biosensor detecting ascospores of Venturia inaequalis, the causual agent of apple scap. It was shown, that such a biosensor could be a useful addition to present-day scab-prediction models. In the examined years 2002 and 2003 the weather-based forecast-models had …