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 20 of 25 for “"fruit crops"”.
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Host-Parasitoid Interactions of Two Invasive Drosophilids in Virginia Fruit Crops
… of frugivorous drosophilids in Virginia fruit cropping systems, and determine if parasitoids were attacking invasive flies Drosophila suzukii (Matsumura) and Zaprionus indianus Gupta (Diptera: Drosophilidae) in the field. Two parasitoids of frugivorous drosophilids, Leptopilina boulardi …
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Biodiversity of phytoparasitic nematodes associated with Musaceae and fruit crops in Colombia
… Radopholus have been recorded in plantain and fruit crops in Colombia. Despite of significant economic losses, taxonomic research on these taxa in Colombia is limited. This thesis focuses mainly on two composition components of biodiversity (species and genes) as a contribution to the analyses …
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The role of chemicals in the location of host plants by midge pests of UK fruit crops
… are important pests of many horticultural crops. They are difficult to control by conventional means as the larvae develop in galls surrounded by plant tissue. Gravid females need to locate suitable host plant material on which to lay their eggs and there is good evidence that host-produced …
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Improved regeneration and Agrobacterium-mediated transformation of wild strawberry (Fragaria vesca L.)
… contains many important commercially grown fruit crops. No comprehensive genomics platform is currently under development for fruit crops, giving functional genomics studies with wild strawberry (Fragaria vesca L.) the potential of identifying genes important in fruit crops. Fragaria vesca …
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Nesting Biology of Osmia cornifrons: Implications for Population Management
… bee managed for the pollination of early season fruit crops such as apple and blueberry. Since its adoption as a managed pollinator in Japan during the 1940s, a large body of literature has amassed with the goal of enhancing O. cornifrons management practices. This research makes important …
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Accessing Chilling Conditions For Perennial Fruit Crop Production in Kentucky
<p>Temperate Region fruit and nut trees, and many other perennial plants, require cool winter temperatures (chilling hours) to ensure leaf and flower bud production in the following season. Temperate Regions are characterized by variable winter and spring temperatures. Failure of meeting sufficient …
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Wasps (Hymenoptera: Chalcidoidea) associated with galls in seed-capsules of Eucalyptus camaldulensis (Myrtaceae) in South Africa : species composition, trophic relationships and effects
… for pollinating the economically important fruit crops in mainly the Western Cape Province. Despite its utility value, it is regarded as invasive in South Africa, the major concern being the large amounts of water it consumes when growing along watercourses. River red gum is therefore the …
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Efficacy of Organic Insecticides and Repellents against Brown Marmorated Stink Bug in Vegetables
… halys (Stål), is a major pest of vegetable crops, fruit crops, and even ornamental plants in the Mid-Atlantic States. Organic growers have limited chemical options to manage this pest, and are in need of better management options. Several organically-approved insecticides including …
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The use of cover crops to increase yield and reduce pest pressure in a commercial avocado orchard at Levubu, Limpopo Province
The study investigated the impact of cover crops (Medicago sativa, Lotus corniculatus, Trifolium pratense, Melilotus alba and Phacelia tanacetifolia), bare soil and natural ground cover on pest and beneficial arthropods, soil health, crop yield, pest damage and weed suppression in avocado orchards. …
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Characterization of the Plant CXE Carboxylesterase Family
… (20) and Oryza sativa (48), from the commercial fruit crops Actinidia spp. (12), Malus pumila (12), and Vaccinium corymbosum (1), plus several CXEs previously identified from a variety of other plant species. Plant CXEs share conserved sequence motifs and secondary structure characteristics with …
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Shifts in suitability distribution of deciduous and citrus fruit trees under climate change in South Africa: a large-scale empirical study
South Africa is the largest fresh fruit exporter by volume in the Southern Hemisphere. The quality and quantity of fruit produced depend on local climate, soil quality, water quality and availability. Climate change impacts may undermine the potential contributions of important fruit crops toward …
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Investigating Seasonal and Occupational Trends of Five Organophosphate Pesticides in House Dust in the Lower Yakima Valley, WA
… by householder work status in pome and orchard fruit crops, agricultural season, use classification of pesticides, and potential for contact with sprayed fruit and orchard trees dictated by work status. As levels of AZ, PH, ML, DZ and CP in house dust were episodic depending on season, they …
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Flavour quality factors and its regulation in red raspberry (rubus idaeus)
… of red raspberries, successful in other related fruit crops (e.g. peach, apple), with 'good' flavour quality determined by sensory panellists. In this study, sensory data was correlated to data on flavour metabolites (e.g. sugars, organic acids and volatiles) through statistical modelling, which …
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Identification and molecular characterisation of elicitor-priming for resistance in tomato against <i>Botrytis cinerea</i>
… cinerea</i> infects almost all vegetable and fruit crops<sup>3</sup>(>1400 plant species), killing the host by inducing necrosis with degradation enzymes (virulence factors) and manipulating its host defences. Non-host inducing agents, such as elicitor molecules, are able to stimulate …
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Risk management in crop farming
… insurance level is influenced by the rate of fruit production and vegetable production in total crop production for all types of subsidised insurance taken together. A high share of fruit production discourages participation in the subsidised insurance system, which can be explained by the …
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Abiotic-Stress Application, Global Berry Proteome Profiling, and Cold-Stress Tolerance in Transformed Winegrape (Vitis vinifera L.).
… continues to provide one of the most important fruit crops worldwide. V. vinifera cultivars are moderately sensitive to salt and temperature stresses, whereas moderate water deficit stress results in minimal loss in berry yields, increased berry quality, and higher rates of winter survival of …
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Exploitation of underexplored physiological, metabarcoding and evolutionary aspects to enhance invasive insect pest management
… eastern Asia that particularly threatens soft fruit crops. The study focused on measuring metabolic and water loss rates of D. suzukii flies captured at different sites located on an altitudinal gradient in Val dei Mocheni (Trentino, Italy) from early summer to fall. Respirometry was used to …
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Dissecting the genetic, physiological and metabolic mechanisms of grapevine resilience to heat stress
… is one of the most widely cultivated perennial fruit crops in the world and its economic relevance is mainly related to wine production. In recent years, the increased frequency of extreme phenomena such as heat waves has been acknowledged as one of the most significant climate variables …
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Identifying and characterizing genes and transcription factors involved in coloration of apple fruit
… Borkh.) is one of the most highly cultivated fruit crops grown around the world and apple consumption has been increasing over the years. One of the most important determinants of fruit quality is skin color. Red coloration in apple fruit is attributed to anthocyanin accumulation. Anthocyanins …
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Applying Molecular and Phenotypic Tools to Characterize Flesh Texture and Acidity Traits in the Arkansas Peach Breeding Program and Understanding the Crispy Texture in the Arkansas Blackberry Breeding Program
… and consumers. Crispy and extremely firm fruits were characterized for two blackberry selections which had been observed to have low color reversion (a postharvest disorder). Firmness of these selections and its seedlings were tested in 2013 and 2014. Results indicated that crispy …
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