First Report of Causing Root Rot of Incense Cedar in Tennessee and the United States.

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.

First Report of Crown and Root Rot on Eastern Redbud () Caused by in Tennessee.

Eastern 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.

First Report of Causing Root Rot on in Tennessee and the United States.

Swamp 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.

Evaluation of Chemical and Biological Products for Control of Crown Gall on Rose.

Crown 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.

Effect of Plasma-Activated Water (PAW) Generated Using Non-Thermal Atmospheric Plasma on Phytopathogenic Bacteria.

Plasma-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.

Vascular streak dieback: A novel threat to redbud and other woody ornamental production in the United States.

Eastern redbud ( L.) is a popular and high-value woody ornamental plant native to the eastern and south-central United States of America (U.S.

First Report of Causing Root Rot on Kousa Dogwood in Tennessee and the United States.

Kousa 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.

Evaluating UV-C Sensitivity of in Model Buffer Solution Using a UV-C Light-Emitting-Diode System.

, 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.

Resistance of Red Maple and Freeman Maple Cultivars to , a Causal Agent of Root and Crown Rot Disease.

Phytopythium 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.

New records of three parasitoids, Pteroptrix chinensis, Aphytis hispanicus, and Marlattiella prima (Hymenoptera: Aphelinidae) associated with an exotic scale, Lopholeucaspis japonica (Hemiptera: Diaspididae) in Tennessee.

A survey for parasitoids of Lopholeucaspis japonica Cockerell (Hemiptera: Diaspididae), an exotic scale of woody ornamentals, resulted in the discovery of 3 species of aphelinid parasitoid wasps, Pteroptrix chinensis (Howard), Aphytis hispanicus (Mercet), and Marlattiella prima Howard. This serves as the first report of these parasitoids reared from a host in the state of Tennessee, USA. Despite routine pesticide applications in the surveyed nursery and directed treatments of the infested plants to control the scale outbreak, the percentage of parasitized scale in privet and euonymus shrubs averaged 7.

Type and duration of water stress influence host selection and colonization by exotic ambrosia beetles (Coleoptera: Curculionidae).

Fungus-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.

First Report of Leaf Blight of Caused by in Tennessee and the United States.

Japanese 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.

First Report of Root Rot of Redbud Caused by in Tennessee and the United States.

The 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.

Acibenzolar-S-methyl induces resistance against ambrosia beetle attacks in dogwoods exposed to simulated flood stress.

Xylosandrus 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.

Evaluation of Hydrangea Cultivars for Tolerance Against Root Rot Caused by .

Root 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.

Evaluation of winter cover crop methods for management of flatheaded appletree borer (Coleoptera: Buprestidae).

Winter cover crops grown at the base of red maples (Acer rubrum L.) can reduce flatheaded appletree borer (Chrysobothris femorata Olivier; Coleoptera: Buprestidae; FAB) damage by both physically blocking preferred oviposition sites and altering the environment around them. However, cover crop competition negatively affects tree growth.

Real-Time and Rapid Detection of Using Loop-Mediated Isothermal Amplification Assay.

(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.

Identification and Chemical and Biological Management of Fusarium Root and Crown Rot Disease of Oakleaf Hydrangea.

Oakleaf 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.

First Report of Leaf Spot of Caused by in Tennessee and the United States.

American 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.

Morpho-physiological and biochemical response of rice ( L.) to drought stress: A review.

Global food shortages are caused mainly by drought, the primary driver of yield loss in agriculture worldwide. Drought stress negatively impacts the physiological and morphological characteristics of rice ( L.), limiting the plant productivity and hence the economy of global rice production.

Sensing and Automation Technologies for Ornamental Nursery Crop Production: Current Status and Future Prospects.

The ornamental crop industry is an important contributor to the economy in the United States. The industry has been facing challenges due to continuously increasing labor and agricultural input costs. Sensing and automation technologies have been introduced to reduce labor requirements and to ensure efficient management operations.