Plant Health Progress
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Plant Health Progress
@planthealthprog.bsky.social
A peer-reviewed, multidisciplinary journal of applied plant health and crop protection. Published by The American Phytopathological Society.
Multiple Fusarium spp. have been reported to be associated with Fusarium head blight on hemp. Misbakhul Munir et al. develop species-specific qPCR assays for detection and quantification of F. graminearum and F. sporotrichioides on hemp: https://doi.org/10.1094/PHP-11-24-0131-RS
Development of qPCR Assays to Detect and Quantify Fusarium spp. on Hemp (Cannabis sativa) Flowers | Plant Health Progress
Fusarium head blight (FHB) is one of the most important diseases affecting hemp. Multiple Fusarium spp. have been reported to be associated with FHB on hemp. The most commonly isolated species were those that potentially produce mycotoxins, such as F. g...
doi.org
November 24, 2025 at 5:14 PM
Get a First Look 🔍: “G143A Mutation identified in Diaporthe helianthi Causing Phomopsis Stem Canker in Sunflower,” by Karthika Mohan et al.: https://doi.org/10.1094/PHP-03-25-0091-RS
G143A Mutation Identified in Diaporthe helianthi Causing Phomopsis Stem Canker in Sunflower | Plant Health Progress
Phomopsis stem canker, primarily caused by Diaporthe gulyae and D. helianthi, is a significant disease of sunflowers (Helianthus annuus L.), leading to yield losses of up to 40%. Foliar fungicides containing pyraclostrobin (quinone outside inhibitors [Q...
doi.org
November 18, 2025 at 4:50 PM
Alejandra M. Jimenez Madrid et al. present the first report of Pseudopithomyces chartarum on corn in the United States. 🌽 Learn more: https://doi.org/10.1094/PHP-10-24-0099-BR
November 12, 2025 at 8:08 PM
Get a First Look 🔍: “A Diagnostic Guide of Diseases Caused by Diaporthe Species in Soybean,” by Milsha George et al.: https://doi.org/10.1094/PHP-03-25-0096-DG
A Diagnostic Guide of Diseases Caused by Diaporthe Species in Soybean | Plant Health Progress
Species of Diaporthe cause major diseases in soybean (Glycine max [L.] Merr.), including Diaporthe (Phomopsis) seed decay, pod and stem blight, and stem canker. This diagnostic guide offers an overview of the symptoms caused by Diaporthe species, as wel...
doi.org
November 6, 2025 at 3:24 PM
High tunnels protect plants, but conditions often result in the accumulation of soilborne pathogens in tomato. Manisha Hamal et al. evaluated the prevalence of soilborne pathogens in 265 tomato high tunnels on 118 farms from 12 states: https://doi.org/10.1094/PHP-01-25-0004-S
November 3, 2025 at 4:55 PM
Get a First Look 🔍: “Genome-Wide Association Study Identified One Major Quantitative Trait Locus Associated with Resistance to Fusarium proliferatum in Soybean (Glycine max L.),” by Nitha Rafi, Matias Dominguez, and Febina M. Mathew
Genome-Wide Association Study Identified One Major Quantitative Trait Locus Associated with Resistance to Fusarium proliferatum in Soybean (Glycine max) | Plant Health Progress
Fusarium root rot is a yield-limiting disease of soybean (Glycine max L.) in the United States and Canada (Ontario). Among the species of Fusarium causing root rot, F. proliferatum is a virulent pathogen. Sources of resistance to F. proliferatum have be...
doi.org
October 28, 2025 at 5:10 PM
Where flowers bloom, so do downy mildews: Catalina Salgado-Salazar et al. report downy mildew observations on several annual, herbaceous perennial, and woody shrub plants in several states in the eastern United States. https://doi.org/10.1094/PHP-10-24-0100-RS
October 22, 2025 at 8:07 PM
Reposted by Plant Health Progress
On this #WorldFoodDay, we celebrate the efforts of those who nourish our communities, protect our planet, and shape a better future through better food for all. Explore resources to learn more about food security and sustainability. #FAO80

https://bit.ly/4nqN3x7
October 16, 2025 at 2:14 PM
Physiological races of Podosphaera xanthii have not been classified for watermelon. Chandrasekar S. Kousik and Jennifer L. Ikerd developed a set of watermelon powdery mildew race differentials and identified potential races. 🍉 https://doi.org/10.1094/PHP-11-24-0114-RS
October 13, 2025 at 4:52 PM
Plant Disease Management Reports (PDMRs) are now easier to navigate! A new update allows users to filter PDMRs by crop type and author, making it easier than ever to find relevant reports.

Explore PDMRs published in Plant Health Progress: apsjournals.apsnet.org/topic/pdmrar...
October 10, 2025 at 8:24 PM
Get a First Look 🔍: “Field-Scale Evaluation of Fungicide Timing for Corn Diseases and Yield in Indiana from 2019 to 2022,” by Kaitlin G. Waibel et al.: https://doi.org/10.1094/PHP-04-25-0103-RS @DTelenko
Field-scale evaluation of fungicide timing for corn diseases and yield in Indiana from 2019 to 2022 | Plant Health Progress
Tar spot (Phyllachora maydis), gray leaf spot (Cercospora zeae-maydis), southern rust (Puccinia polysora), and northern corn leaf blight (Exserohilum turcicum) are foliar diseases that can significantly reduce corn (Zea mays) yields in Indiana. The obje...
doi.org
October 7, 2025 at 4:50 PM
Since 2020, a disease syndrome on watermelon plants has been observed in Jalisco, Mexico. Hernández-Pérez et al. present the first report of CYSDV and WmCSV in a natural mixed infection in watermelon in Mexico 🍉: https://doi.org/10.1094/PHP-10-24-0096-BR
October 1, 2025 at 7:45 PM
Get a First Look 🔍: “Comparison of Cuprous Oxide and Chlorothalonil Applied Alone and as Tank Mix Partners with Flutolanil or Inpyrfluxam for Management of Late Leaf Spot (Nothopassalora personata) of Peanut,” by Alana G. Atkinson et al.: https://doi.org/10.1094/PHP-02-25-0052-RS
September 25, 2025 at 4:53 PM
Diagnostic Guide: “Sunflower Head Rot Diseases: Botrytis Head Rot and Bacterial Head Rot,” by Malcolm Ryley et al.: https://doi.org/10.1094/PHP-08-24-0077-DG
September 22, 2025 at 5:09 PM
Get a First Look 🔍: “Occurrence of Plant-Parasitic Nematodes in Pacific Northwest Hopyards,” by Lester Antonio Núñez Rodríguez et al.: https://doi.org/10.1094/PHP-01-25-0011-RS
https://doi.org/10.1094/PHP-01-25-0011-RS
t.co
September 18, 2025 at 9:30 PM
Potato virus Y (PVY) strain surveys (2019–2023) across Michigan seed lots by Mio Satoh-Cruz et al. reveal PVYN-Wi as dominant, but necrotic strains like PVYNTN and PVYE persist. Continued monitoring is vital for management. Learn more: doi.org/10.1094/PHP-...
May 19, 2025 at 7:32 PM
A decade-long study by Phillip S. Wharton, Alan Malek, and Katie L. Malek, published in Plant Health Progress, is the first to provide conclusive evidence that copper-based fungicides reliably manage aerial stem rot in potatoes. 🥔 Read the full press release: www.apsnet.org/about/newsro...
April 17, 2025 at 5:37 PM
Reposted by Plant Health Progress
560 million bushels gone. $2.9 billion lost.

These are the estimated losses caused by wheat diseases from 2018 to 2021. Read more in the new @planthealthprog.bsky.social publication at doi.org/10.1094/PHP-....

@badgercropdoc.bsky.social @alabamaed1.bsky.social
#science 🧪 #wheat #disease #IPM
March 20, 2025 at 12:03 PM
A 3-year study by Bhavit Chhabra et al. in the eastern U.S. showed that the fungicide Sphaerex effectively controlled Fusarium head blight and deoxynivalenol levels, with similar results to standard fungicides. @umnplantpath.bsky.social doi.org/10.1094/PHP-...
Testing the Efficacy of a Newly Released Fungicide, Sphaerex, for Control of Fusarium Head Blight in Wheat | Plant Health Progress
Fusarium head blight (FHB) is a destructive disease of wheat and other small-grain cereals. FHB causes reduction in crop yield due to premature bleaching of spikes. Additionally, it deteriorates the crop quality due to production of mycotoxins. An integrated management strategy is needed to effectively manage this disease. One of the most important strategies in the FHB management toolbox is chemical control. Fungicides start losing their efficacy over time due to the development of fungicide resistance in the pathogens. This necessitates the development and testing of new fungicides with multiple active ingredients or modes of action. In this 3-year study, we evaluated the effectiveness of a new fungicide with multiple active ingredients, Sphaerex (a proprietary mix of metconazole and prothioconazole), in an FHB-susceptible soft red winter wheat cultivar, Shirley, in the eastern United States. Sphaerex provided significantly better control over untreated plots for FHB incidence, FHB severity, and deoxynivalenol (DON) content across all 3 years. The level of control of FHB and DON by Sphaerex was found to be similar to that provided by other standard FHB fungicides. The yield of the fungicide-treated plots was statistically similar to that of the untreated plots.
doi.org
February 25, 2025 at 5:35 PM
Starting this year, Plant Disease Management Reports (PDMRs) will be published in Plant Health Progress. With this change, PDMRs now offer year-round submission with prompt publication upon acceptance. Learn more: apsjournals.apsnet.org/page/php/pdmr
February 24, 2025 at 4:57 PM
Black root rot is a significant seedling disease in Australian cotton. This guide by Duy P. Le et al. offers diagnostic tools, pathogen isolation methods, molecular identification techniques, and pathogenicity assessment approaches. doi.org/10.1094/PHP-...
February 17, 2025 at 7:57 PM
Foliar diseases affect table beet production in New York. Field trials by Pratibha Sharma et al. show varying susceptibility among cultivars, with Bazzu and Irazu offering the best resistance to all three diseases. doi.org/10.1094/PHP-...
February 11, 2025 at 6:07 PM
Reposted by Plant Health Progress
Thank you for this recognition @planthealthprog.bsky.social @plantdisease.bsky.social! 🎊🥳
February 5, 2025 at 11:07 PM
Small fruit crops are vital to the Pacific Northwest. A new study by Cristian Olaya et al. reveals dagger nematodes in 52% of fields surveyed and reports ToRSV in Oregon wine grapes and red currants for the first time, updating virus-vector data. Learn more: doi.org/10.1094/PHP-...
January 7, 2025 at 7:46 PM
Reposted by Plant Health Progress
"The...significant effect of hybrid susceptibility on disease severity & yield suggests...use of genetic resistance may be more effective in tar spot...management than altering plant density."

From @planthealthprog.bsky.social's pub apsjournals.apsnet.org/doi/10.1094/...

@plantdisease.bsky.social
Effects of Nitrogen Application Rate and Plant Density on Severity of Tar Spot of Corn | Plant Health Progress
Tar spot of corn, caused by the fungus Phyllachora maydis, is an economically important foliar disease recently reported in the United States and Canada. Due to the recent introduction of Phyllachora maydis, the impacts of cultural management practices on disease development are still unknown. Separate field studies were conducted to determine the effects of nitrogen (N) application rate and plant density on disease development. Field trials were conducted across six site years in Michigan with two corn hybrids of differing disease susceptibility. The relative area under the disease progress curve was used to compare disease development between N application rates and plant densities. Nitrogen application rate had no significant effect on disease at any location. Plant density and disease had a significant (P < 0.05) inverse relationship at five of six site years, with an average 41% decrease in the relative area under the disease progress curve for every 1,000 plants per hectare increase. The economically optimal planting density ranged from 73 to 77 thousand plants per hectare for US$150 to 300 per metric ton corn prices, demonstrating that relatively low planting densities were more profitable despite greater disease. Therefore, other disease management practices including hybrid selection may be more effective at protecting yield than increasing plant density.
apsjournals.apsnet.org
January 3, 2025 at 8:30 PM