Open Research Oklahoma
ORO serves as the home for Oklahoma State University's open-access intellectual output. It includes digital dissertations, faculty publications, OSU Extension publications, undergraduate research, open educational resources, and more. Email openresearch@okstate.edu to see how your Oklahoma-based institution can join.
Recent Submissions
Publication Effectiveness of hexanoic acid for the management of bacterial spot on tomato caused by Xanthomonas perforans(MDPI, 2025-03-25)Bacterial spot of tomato (BST), caused by Xanthomonas euvesicatoria pv. perforans (referred to as X. perforans thereafter), is widely distributed globally, including Florida, and reduces fruit quality and yield in tomato fields. Currently, copper-based bactericides are widely used for this disease control; however, the effectiveness of these treatments has diminished due to the emergence of copper-tolerant strains. Therefore, there is a need for novel chemical controls against BST. In this study, we investigated hexanoic acid (HA) as an alternative against copper-tolerant strains of X. perforans through laboratory, greenhouse, and field experiments. In vitro experiments demonstrated HA had a lower minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) compared to copper sulfate, with values of 512 and 1024 mg/L for HA versus 1024 and 2048 mg/L for copper sulfate. HA exhibited bactericidal activity within 1 h at 512 and 1024 mg/L. In greenhouse trials, HA applied at 512 and 1024 mg/L two days before inoculation significantly reduced disease severity compared to untreated controls and Kocide 3000 (copper hydroxide) + Penncozeb. However, field trials indicated that while HA reduced disease severity relative to the untreated control, it did not outperform the grower standard commercial bactericide ManKocide (copper hydroxide + mancozeb), nor did it improve total yield. Previous studies have shown the antimicrobial activity of HA against various other phytopathogens, but this study is the first to demonstrate the potential of hexanoic acid for controlling BST.Publication Status and distribution of diseases caused by phytoplasmas in Africa(MDPI, 2025-05-27)Phytoplasma (“Candidatus Phytoplasma” species) diseases have been reported globally to severely limit the productivity of a wide range of economically important crops and wild plants causing different yellows-type diseases. With new molecular detection techniques, several unknown and known diseases with uncertain etiologies or attributed to other pathogens have been identified as being caused by Phytoplasmas. In Africa, Phytoplasmas have been reported in association with diseases in a broad range of host plant species. However, the few reports of Phytoplasma occurrence in Africa have not been collated together to determine the status in different countries of the continent. Thus, this paper discusses the geographical distribution, detection techniques, insect vectors, alternative hosts and socio-economic impacts of Phytoplasma diseases in Africa. This is to create research perspectives on the disease’s etiology in Africa for further studies towards identifying and limiting their negative effects on the continent’s agricultural economy. In Africa, Phytoplasmas recorded in different countries affecting different crops belong to eight groups (16SrI, 16SrII, 16SrIII, 16SrIV, 16SrVI, 16SrXI, 16SrXIV and 16SrXXII) out of the 37 groups and over 150 subgroups reported worldwide on the basis of their 16S rRNA RFLP profile. Lethal yellow disease was the most destructive Phytoplasma reported in Africa and has a high socio-economic impact.Publication OER and ethical learning analytics(Open Education (OER) Conference, 2023-04-06)This presentation examines the intersection of open educational resources (OER) and ethical learning analytics (LA), focusing on student data privacy in higher education. It outlines a framework developed by a university library team to ethically collect and use learning data, grounded in values such as care, equity, and student autonomy. The session explores practical steps for implementing ethical LA practices, highlights the importance of student voice in shaping data policies, and provides tools and frameworks for institutions seeking to align OER initiatives with responsible data stewardship.Publication Re-routing: OpenOKState undergraduate student outreach(Colorado OER Conference, 2025-05-30)This presentation explores a collaborative outreach initiative between an open educational resources (OER) program and a university student council. The project focuses on empowering undergraduate students through OER advocacy, retention support, and inclusive academic engagement. Drawing on student leadership and institutional collaboration, the session highlights strategies for sustainable student involvement in open education.Publication Multifactor comparison of pragmatics, social relationships, and discrimination among individuals with hearing loss(2021-05)Individuals with hearing loss (HL) often report inadequate interpersonal relationships. Previous research explored relationships between pragmatics and social relationships in children with HL. This study investigated how pragmatics and socio-relational functional development impact quality of life in adults with HL who use cochlear implants or hearing aids. Additionally, this current research uses self-report surveys which include the desired social factors needed to explore these particular relationships. The Sociolinguistics and Hearing Loss Survey included modifications of existing surveys to examine factors such as: relationship quality (support/advocacy), social discrimination (occupational /educational), pragmatic and conversational competence (listening effort/communication skills), and internal and external perceptions (impact of hearing loss). Surveys were analyzed from 52 participants with a range of HL severities and ages of diagnosis. Results suggest that stronger pragmatic and conversational competence is related to: (1) experiencing less socio-relational discrimination in social relationships and workplace; (2) more positive perceptions from conversational partners; (3) increased presence of self-advocacy; and (4) greater support/accommodations related to familial and workplace relationships. To improve quality of life for HL individuals, speech-language pathologists, researchers, educators, and family members must develop a deeper understanding of the pragmatic and communication competence of those with HL to allow for effective and efficient assessment, intervention, and treatment.
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