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Laboratory Method To Estimate Rain-Induced Splitting In Cultivated Blueberries, Kenneth Curry
Laboratory Method To Estimate Rain-Induced Splitting In Cultivated Blueberries, Kenneth Curry
Kenneth J. Curry
Preharvest rainfall that occurs when fruit are fully ripe or approaching full ripeness can result in detrimental fruit splitting in rabbiteve and southern highbush blueberries. This study was initiated to develop a laboratory method to model rain-related incidence of splitting in cultivated blueberries with the goal of predicting the incidence of splitting in blueberry cultivars and selections. Multiyear field surveys of rabbiteye and southern highbush cultivars show that the incidence of rain-related splitting is strongly cultiva-dependent. Laboratory values for forced splitting and naturally occurring rain-related field splitting data show a strong correlation indicating that the incidence of fruit splitting can …
Effect Of Cercosporella Rubi On Blackberry Floral Bud Development, Kenneth Curry
Effect Of Cercosporella Rubi On Blackberry Floral Bud Development, Kenneth Curry
Kenneth J. Curry
Rosette, caused by the fungus Cercosporella rubi, is an important blackberry disease in the southeastern United States. This disease severely reduces fruit production, and its management has been erratic due to a limited understanding of the host-pathogen relationship. In this study, we expand on previous histological investigations of the development of C. rubi on blackberry at tissue and cellular levels from floral bud initiation through senescence of the flower. Symptomatic and asymptomatic floral buds were examined with light microscopy and both scanning and transmission electron microscopy (SEM and TEM, respectively). Fungal development on the surface of floral buds was …
Osmophore Development In Stanhopea Anfracta And S. Pulla (Orchidaceae), Kenneth Curry
Osmophore Development In Stanhopea Anfracta And S. Pulla (Orchidaceae), Kenneth Curry
Kenneth J. Curry
The developmental anatomy and morphology of the floral scent glands (osmophores) were examined daily from the late bud stage to post-anthesis, for 2 species which are considered to be at opposite poles in the evolutionary development of the genus. The osmophore of S. anfracta was studied using morphometric techniques to estimate volume density of selected cellular inclusions, whereas the osmophore of S. pulla was examined qualitatively. The volume density of starch/amyloplast in S. anfracta remained relatively constant throughout most of the two-day flowering period as did the degree of cell vacuolation. The flower of S. pulla lasts only one day, …
Improved Microassays Used To Test Natural Product-Based And Conventional Fungicides On Plant Pathogenic Fungi, Kenneth Curry
Improved Microassays Used To Test Natural Product-Based And Conventional Fungicides On Plant Pathogenic Fungi, Kenneth Curry
Kenneth J. Curry
Interpretive Summary: New effective fungicides are needed to control fungal pathogens that have developed resistance to currently used fungicides or to replace fungicides that have lost their registration for use on certain crops. Natural products are one source of these new fungicides. Prospective new fungicides are screened in vitro to identify products which inhibit germination of fungal conidia or prevent normal growth of fungal hyphae. In this paper we established standard conditions that improved the in vitro micro titer assays used in the initial screening of natural products as potential fungicides. The simple step of washing fungal spores prior to …