Incense cedar [ (Torr.) Florin] is a coniferous evergreen tree, indigenous to western North America, that is being evaluated in Tennessee for its adaptability to eastern U.S.
View Article and Find Full Text PDFEastern redbuds () are the important trees in Tennessee nurseries, known for their vibrant spring blooms, and heart-shaped foliage (Kidwell-Slak and Pooler 2018). In May 2023, container-grown eastern redbuds exhibited crown and root rot symptoms. Disease incidence was 50% of 100 plants and severity was 40% for the affected root area.
View Article and Find Full Text PDFSwamp white oak () is a North American species of medium-sized trees in the beech family. One-year-old swamp white oak seedlings grown in field conditions in a commercial nursery in Warren County, Tennessee exhibited severe root rot in July 2024. Dark brown lesions were observed in the affected roots (Fig.
View Article and Find Full Text PDFCrown gall is a soil-borne bacterial disease caused by , leading to significant economic losses in many plant species. For the assessment of the biological and chemical products on crown gall, each plant's crown region and roots were wounded, and then were dipped into their respective treatments. After the treatments, the plants were inoculated with a suspension of pathogenic isolate FBG1034 and maintained in a greenhouse for six months to assess them for gall formation.
View Article and Find Full Text PDFPlasma-activated water (PAW) exhibits potent antimicrobial properties attributed to the generation of diverse reactive oxygen and nitrogen species. This study assessed the effectiveness of PAW in vitro against phytopathogenic and pv. , which cause diseases on ornamental plants.
View Article and Find Full Text PDFEastern redbud ( L.) is a popular and high-value woody ornamental plant native to the eastern and south-central United States of America (U.S.
View Article and Find Full Text PDFKousa dogwood () is an economically important woody ornamental crop that exhibits creamy, white, pointed bracts in late spring, and reddish to pink drupe fruits in late summer and fall. It bears shiny dark green leaves that become reddish-purple to scarlet in the fall. In August of 2023, 3-year-old container grown var.
View Article and Find Full Text PDF, responsible for boxwood blight, produces sticky conidia that pose a contamination risk in boxwood production via cross-contamination from tools, equipment, and other resources. This study evaluated UV-C light-emitting-diode (LED) irradiation (263 to 287 nm) as a disinfection method by examining its effectiveness in inactivating conidia and determining the UV-C sensitivity. Conidial suspensions were exposed to quantifiable UV-C doses under a dynamic stirring condition.
View Article and Find Full Text PDFPhytopythium root rot caused by is an emerging threat to red maple and Freeman maple production that seriously impacts plant growth, aesthetic, and economic values. This study reports on the resistance of red maple and Freeman maple cultivars against root rot disease caused by . Rooted cuttings were received from a commercial nursery and planted in 3-gallon containers.
View Article and Find Full Text PDFFungus-farming ambrosia beetles in the tribe Xyleborini tunnel into plants and trees to establish chambers for cultivating their nutritional fungal mutualists and rearing offspring. Some xyleborine ambrosia beetles preferentially infest and perform better in living but weakened trees. Flood stress predisposes horticultural tree crops to infestation, but the impact of drought stress has not been well studied.
View Article and Find Full Text PDFAmerican ginseng, a highly valuable crop in North America, is susceptible to various diseases caused by fungal pathogens, including spp., spp., and spp.
View Article and Find Full Text PDFJapanese camellia (), is an important ornamental species that has an increasing economic value in China, Japan, Australia and the USA (Vela et al. 2013). Leaf blight symptoms were observed on 20-year-old 'April Tryst' leaves collected from a research plot in McMinnville, TN in March 2022.
View Article and Find Full Text PDFThe eastern redbud ( L.) is an esthetically and economically important landscape tree with vibrant blossoms and attractive heart-shaped leaves. One-year-old eastern redbud seedlings grown in field condition in two commercial nurseries in Warren Co.
View Article and Find Full Text PDFXylosandrus spp. ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) are important wood-boring pests of nursery trees weakened by abiotic and biotic stressors. Acibenzolar-S-methyl (ASM), a plant defense elicitor, was tested for inhibiting Xylosandrus spp.
View Article and Find Full Text PDFRoot rot caused by Schltdl. is a newly identified disease in oakleaf hydrangea. Some cultivars such as Pee Wee and Queen of Hearts grown in pot-in-pot container systems showed root rot symptoms after late spring frost in May 2018 with 40 and 60% incidence in the infected nursery, respectively.
View Article and Find Full Text PDF(de Bary) Abad, de Cock, Bala, Robideau, A. M. Lodhi & Levesque is an important waterborne and soil-inhabiting oomycete pathogen causing root and crown rot of various plants including certain woody ornamentals, fruit, and forest trees.
View Article and Find Full Text PDFOakleaf hydrangea () is an important ornamental plant grown in Tennessee. In May 2018, after late spring frost, cultivars Pee Wee and Queen of Hearts showed root and crown rot symptoms and identification and management of the disease was a major concern. The objective of this research was to identify the causal organism of this disease and develop management recommendations for nursery growers.
View Article and Find Full Text PDFAmerican ginseng ( L.) is an herbaceous perennial understory plant. It was listed as endangered species by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (McGraw et al.
View Article and Find Full Text PDFRed maple ( L.) is an economically important ornamental nursery plant grown for its aesthetic value. In May 2022, field and container-grown red maple 'October Glory' plants exhibited severe leaf spots in a commercial nursery in Warren Co.
View Article and Find Full Text PDFAmerican ginseng ( L.) is one of the most valuable medicinal plants that is native to the U.S.
View Article and Find Full Text PDFAmerican ginseng ( L.), native to the forested regions of northeast U.S is a perennial herb valued as traditional Chinese medicine.
View Article and Find Full Text PDFAmbrosia beetles (Coleoptera: Curculionidae, Scolytinae) and Phytophthora root rot (Peronosporales: Peronosporaceae) cause significant damage to the ornamental industry in the United States. In this study, mefenoxam (fungicide), permethrin (insecticide), and charcoal + kaolin were used in different combinations with Phytophthora cinnamomi (Rands: Peronosporales: Peronosporaceae) inoculated and noninoculated plants to optimize the management of ambrosia beetles and Phytophthora root rot. Treatment applications were performed in two trials on 1 (mefenoxam, drench), 18 (P.
View Article and Find Full Text PDFPhytophthora root rot, caused by Rands, is one of the major diseases of flowering dogwood ( L.). The severity of root rot disease increases when the plants are exposed to flooding conditions.
View Article and Find Full Text PDF