Sara May, The Pennsylvania State University – NEPDN, Swarnalatha Moparthi, North Carolina State University – SPDN, and Samantha Fieweger, Wisconsin Department of Agriculture, Trade, and Consumer Protection - NCPDN
The Communicator: Volume 6, Issue 2, February 2025
Contact Sara May (srm183@psu.edu), Swarnalatha Moparthi (smopart@ncsu.edu), and Samantha Fieweger (sam.fieweger@wisconsin.gov) for suggestions to include.
Denotes publications with one or more authors who are members of NPDN.
Diagnostic guides
Sunflower head rot diseases: Botrytis head rot and bacterial head rot https://doi.org/10.1094/PHP-08-24-0077-DG
Pathogens
Defining the pathobiomes associated with drippy blight in Colorado and drippy nut in California https://doi.org/10.1094/PHYTOFR-03-24-0029-R
Methods and protocols
Optimization of amplicon-based sequencing for large-scale diagnostics of known pome viruses and viroids https://doi.org/10.1094/PHYTOFR-01-24-0003-SC
Development of tools to detect and identify strains belonging to the Pseudomonas syringae species complex responsible for vein clearing of zucchini https://doi.org/10.1094/PHYTOFR-05-23-0062-R
Development of a qPCR and a LAMP assay for Verticillium longisporum detection and a triplex qPCR assay for simultaneous detection of V. longisporum, Leptosphaeria biglobosa, and L. maculans from canola samples https://doi.org/10.1094/PHYTOFR-03-24-0031-R
A molecular method to assess viability of Phytophthora in infected wood following phytosanitary heat treatment https://doi.org/10.1094/PHYTOFR-05-24-0056-R
Towards improved nepovirus detection and identification in Xiphinema nmatodes https://doi.org/10.1094/PHYTOFR-03-24-0018-R
Detection and characterization of potato virus Y (PVY) strains and mixed infections in San Luis Valley, Colorado https://doi.org/10.1094/PHYTOFR-03-24-0028-R
Seedborne fungal detection differs with seed assay method, and fungal diversity and abundance are impacted by fungicide treatment, harvest timing, and storage environment https://doi.org/10.1094/PHYTOFR-06-24-0076-R
Notable First Reports
Herbaceous ornamentals and turfgrass:
First report of Pseudomonas amygdali causing leaf spot on Hibiscus rosa-sinensis in a greenhouse in New York State, U.S.A. https://doi.org/10.1094/PDIS-07-24-1556-PDN
First report of Hyaloperonospora sp. causing downy mildew of stock (Matthiola incana) in Ohio https://doi.org/10.1094/PDIS-08-24-1708-PDN
First report of anthracnose caused by Colletotrichum sansevieriae on Dracaena trifasciata (snake plant) in Tennessee https://doi.org/10.1094/PDIS-05-24-1049-PDN
Woody ornamentals and forests:
First report of Phytopythium vexans causing root rot on tulip poplar in Tennessee and the United States https://doi.org/10.1094/PDIS-11-24-2343-PDN
First report of Xylella fastidiosa subsp. multiplex infecting southern shagbark hickory (Carya carolinae-septentrionalis) in Georgia, USA https://doi.org/10.1094/PDIS-09-24-1990-PDN
First report of Phytopythium vexans causing root rot of incense cedar in Tennessee and the United States https://doi.org/10.1094/PDIS-11-24-2342-PDN
Vegetables, herbs and table beet:
First report of bacterial wilt of ginger caused by Ralstonia pseudosolanacearum in the continental United States https://doi.org/10.1094/PDIS-11-24-2402-PDN
Tree fruit and small fruit: berries, nuts, stone and pome fruit:
First report of postharvest fruit rot on passion fruit (Passiflora edulis) caused by Lasiodiplodia theobromae in the U.S.A. https://doi.org/10.1094/PDIS-09-24-1968-PDN
First report of Neofusicoccum mediterraneum causing persimmon (Diospyros kaki) branch and twig canker in California https://doi.org/10.1094/PDIS-06-24-1298-PDN
Field crops, cannabis, sugar beet, potato, sunflower:
First report of Pantoea ananatis causing bacterial leaf and panicle blight of rice in Louisiana, USA https://doi.org/10.1094/PDIS-08-24-1731-PDN
Peer review highlights
The bacterial and viral communities associated with onion bacterial bulb rot
https://doi.org/10.1094/PBIOMES-11-23-0121-R
Tar spot of maize in the Americas is caused by a complex of closely related Phyllachora species which vary in their host and geographic range
https://doi.org/10.22541/au.170669802.27673013/v1
An emerging fungal disease is spreading across the globe and affecting the blueberry industry
https://doi.org/10.1111/nph.20351
Phytophthora species and their associations with chaparral and oak woodland vegetation in Southern California
https://doi.org/10.3390/jof11010033
Optical density assay to determine the sensitivity of Globisporangium and Pythium isolates to mefenoxam
https://doi.org/10.1094/PHYTOFR-09-24-0105-FI
Mycovirome of Diaporthe helianthi and D. gulyae, causal agents of Phomopsis stem canker of sunflower (Helianthus annuus L.)
https://doi.org/10.1016/j.virusres.2024.199521
Sensitivity to the demethylation inhibitor difenoconazole among baseline populations of various Penicillium spp. causing blue mold of apples and pears
https://doi.org/10.3390/jof11010061
A bioassay that yields quantifiable symptoms of cucurbit yellow vine disease caused by Serratia marcescens
https://doi.org/10.1094/PDIS-07-24-1401-RE
Evidence of rapid infection of four sweetpotato potyviruses in a commercial field in California
https://doi.org/10.1094/PDIS-06-24-1304-SC
Extension
The emergence of Fusarium oxysporum f. sp. apii race 4 causing Fusarium wilt on celery in south Florida
https://doi.org/10.32473/edis-pp381-2024
Field guide to hemp (Cannabis sativa) diseases.
DOI: https://doi.org/10.32473/edis-pp379-2024
Citrus canker and citrus leprosis fruit symptom comparison.
https://doi.org/10.32473/edis-PP372-2024
