Publications by authors named "Farhat A Avin"

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.

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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.

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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.

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Article Synopsis
  • Nandina 'Fire Power' plants in Tennessee experienced severe leaf yellowing and root rot, affecting 80% of a sample group in a commercial nursery in April 2024.
  • Researchers isolated the root tissues and identified fungal growth using V8 agar, revealing the presence of specific morphological features linked to a particular pathogen.
  • Genetic sequencing using multiple primer pairs confirmed the identification of the isolates, providing vital information on the genetic markers associated with the disease affecting the nandina plants.
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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.

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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.

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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.

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Article Synopsis
  • Scrub titi is a native shrub in central Florida with potential landscaping uses due to its attractive features, but it faces disease issues as observed in a nursery in Tennessee.
  • Symptoms such as black leaf lesions and brown stem lesions were identified, with a disease severity of 25% and incidence of 10% in the studied plant population.
  • Bacterial analysis revealed a gram-negative strain with sequences closely related to a known species, suggesting it may be a new species pending further classification.
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American ginseng, a highly valuable crop in North America, is susceptible to various diseases caused by fungal pathogens, including spp., spp., and spp.

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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.

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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.

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(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.

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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.

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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.

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Red 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.

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American ginseng ( L.) is one of the most valuable medicinal plants that is native to the U.S.

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American ginseng ( L.), native to the forested regions of northeast U.S is a perennial herb valued as traditional Chinese medicine.

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pv. , which causes bacterial canker, is the most polyphagous bacterium in the . complex because of its broad host range.

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Boxwood ( sp. L.) is a very popular evergreen shrub in the United States which is widely used as landscape plant and fresh greenery.

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Soilborne diseases caused by pathogens such as , , , , and species are the most important diseases of woody ornamentals. Ginkgo () and red maple ( 'October Glory') plants grown in containers and fields in Tennessee showed root and crown rot symptoms with dark brown to black lesions in 2017 and 2018. The objective of this research was to isolate and identify pathogens affecting ginkgo and red maple plants in Tennessee nurseries and to develop fungicide/biofungicide management recommendations for nursery producers.

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Eastern ninebark ( (L.) Maxim.) is a popular native perennial plant used in landscapes because of its colorful foliage and spring flower display.

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Flowering cherry ( Lindl. 'Kwanzan') rooted cuttings grown in propagation beds containing 40% coarse sand and 60% ground pine bark in a commercial propagation nursery in Warren County, Tennessee were exhibiting root and crown rot in December 2016. Dark brown to black soft lesions were observed in the roots as well as the crown region of flowering cherry rooted cuttings and those rooted cuttings were non-marketable due to lesions.

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DNA barcoding involves the use of one or more short, standardized DNA fragments for the rapid identification of species. A 648-bp segment near the 5' terminus of the mitochondrial cytochrome oxidase subunit I (COI) gene has been adopted as the universal DNA barcode for members of the animal kingdom, but its utility in mushrooms is complicated by the frequent occurrence of large introns. As a consequence, ITS has been adopted as the standard DNA barcode marker for mushrooms despite several shortcomings.

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Identification of edible mushrooms particularly Pleurotus genus has been restricted due to various obstacles. The present study attempted to use the combination of two variable regions of IGS1 and ITS for classifying the economically cultivated Pleurotus species. Integration of the two regions proved a high ability that not only could clearly distinguish the species but also served sufficient intraspecies variation.

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NF kappa B inhibitor alpha (MrNFκBI-α) was sequenced from a freshwater prawn Macrobrachium rosenbergii. The MrNFκBI-α protein contains a long ankyrin repeat region circular domain between 193 and 413 along with its 6 repeats (ankyrin repeat 1,2,3,4,5 and 6). An IκB degradation motif and a putative PEST motif is present at 37-64 and 418-471 of the N- and C-terminal regions of MrNFκBI-α respectively.

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