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Enabling Breeding For Fruitlet Freeze Tolerance In Peach, Ufuk Caglar
Enabling Breeding For Fruitlet Freeze Tolerance In Peach, Ufuk Caglar
All Theses
Climate change is affecting the production of temperate fruit crops, with cold temperatures emerging as a critical abiotic stressor that limits plant growth and performance. Freeze damage, particularly in spring, has resulted in significant economic losses in peach production in the southeastern United States. Research efforts in peach and other Prunus species have primarily focused on studying dormancy-related traits associated with bloom time, such as chill and heat requirement, with fruitlet freeze tolerance not equally represented. Breeding for climate resilience in peach requires a combination of these traits to allow for late bloom via targeted chill requirement and high heat …
Screening For Dmi And Mbc Fungicide Resistance In Monilinia Fructicola And Evaluation Of Biorational Products For Control Of Brown Rot On Peach In The Southeast United States, William Gura
All Theses
Monilinia fructicola (G. Winter) Honey is a fungal pathogen and is the causal agent of blossom blight, twig blight, green fruit rot, preharvest brown rot, and postharvest brown rot of peach (Prunus persica (L.) Batsch). Especially pre-and postharvest brown rot can have devastating economic impacts and negatively effects yield for peach growers throughout the southeastern United States. The most effective method for the control of pre- and postharvest brown rot is the application of synthetic fungicides during preharvest season. However, the consecutive use of fungicides with the same mode of action potentially give rise to resistance. This thesis focuses …
Evaluation Of Novel Management Options For Bacterial Spot Of Peach, Daniela Moreno
Evaluation Of Novel Management Options For Bacterial Spot Of Peach, Daniela Moreno
All Theses
Xanthomonas arboricola pv. pruni (Xap) is an economically important pathogen causing bacterial spot of stone fruits worldwide. In the southeastern US management for this disease relies on copper and oxytetracycline (OTC) sprays, yet disease incidence remains high especially when the environmental conditions are conducive (warm and rainy). To further complicate disease management copper tolerant and OTC resistant (OTCR) strains of Xap have been reported in the southeastern peach orchards. complicating disease management. Therefore, we aim to evaluate potential chemical and biological alternatives for disease management. The first objective was to evaluate a novel nano nanoformulation Bz (Zinc Borate) …
Effects Of Thermal Processing On Peach Puree Of Different Cultivars: Analysis Of Biochemical Alteration, Non-Enzymatic Browning Reaction, And Color Changes, James Hayes
All Theses
The effects of pasteurization temperature and time on the change in seven peach puree variables over a 6-week accelerated shelf-life test (35°C) were evaluated. The variables of interest were three color measures [ L* (lightness), a* (redness), and b* (yellowness)]; two brown pigment measures [spectrophotometric absorption at 420 nm (Browning Index) and 443 nm (Hydroxymethylfurfural)]; °Brix; and pH). Puree was collected from three different cultivars (2 freestone and 1 clingstone) and puree samples from each cultivar were subjected to 20 combinations of pasteurization temperatures (70°C, 80°C, 90 °C, 100°C) and same hold times (0 minutes, 1 minute, 3 minutes, 5 …
Identification Of Cytospora Species Isolated From Canker In Peach Trees In South Carolina, Stephen T. Baker
Identification Of Cytospora Species Isolated From Canker In Peach Trees In South Carolina, Stephen T. Baker
All Theses
In 2016, a survey was conducted into the causes of twig blight on peach (Prunus persica) in five orchards across South Carolina. From this survey, isolates from the fungal genus of Cytospora (Sordariomycetes, Diaporthales) were reported on peach, for the first time, within the state. Cytospora species are known to cause oozing cankers on a wide range of woody hosts leading to dieback, loss of limbs, and reduction in yield, prompting concern for important economic crops. Past methods of identification of Cytospora species have been confounded by indistinguishable morphology, overlapping host preference among species, and genetic sequencing …
Antioxidant Effect Of Peach Skin Extracts From 13 Varieties Of South Carolina Grown Peaches, Yueyuan Zhang
Antioxidant Effect Of Peach Skin Extracts From 13 Varieties Of South Carolina Grown Peaches, Yueyuan Zhang
All Theses
South Carolina is the second largest peach producing state in the United States. Every year, large quantities of peaches do not meet the fresh peach standard and are discarded or used for further processing. The waste stream from discarded and processed peaches includes the skin and this could be recovered as a rich source of antioxidants. The objective of this research was to determine the antioxidant (phenolic) content and antioxidant capacity of peach skin from various peach varieties grown in South Carolina. Chapter 1 is a literature review which covers topics of oxidation in foods, mechanism of lipid oxidation, antioxidants …
Dwarfing Mechanisms Of Prunus Species As Interstems And Rootstocks On Peach [Prunus Persica (L.) Batsch] Tree Vegetative Growth And Physiology, Antonio Weibel
Dwarfing Mechanisms Of Prunus Species As Interstems And Rootstocks On Peach [Prunus Persica (L.) Batsch] Tree Vegetative Growth And Physiology, Antonio Weibel
All Dissertations
The use of small trees in orchard systems reduces manual labor (pruning, thinning and harvesting), and induces precocity, thus making high-density plantations economically advantageous, which has elicited an interest in size-controlling rootstocks. However, the mechanisms involved in the reduction of scion growth by the rootstock are not well understood. The main objective of this study was to gain a better understanding of the dwarfing mechanism induced by size-controlling peach rootstocks. The relationship among different rootstocks (dwarfing to invigorating range) as to stored carbohydrates, tree water status, and interstem and grafting height was evaluated on young and mature `Redhaven' and `Redtop' …