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Plant Disease @plantdiseasej.bsky.social · 04/10/2026

“Genetic Dissection of Adult-Plant Resistance to Stripe Rust in the Winter Wheat Line Tianmin 668,” by Jinghuang Hu et al. Learn more: doi.org/10.1094/PDIS-11-25-2275-RE

Fig. 1. Frequency distribution and correlation analysis of stripe rust maximum disease severity in recombinant inbred lines from the cross Tianmin 668 × Jingshuang 16 across three years and BLUP datasets. Field phenotyping was conducted in the field plots at Qingshui, Gansu Province, in the growing seasons 2019 to 2020 (Q2020), 2020 to 2021 (Q2021), and 2021 to 2022 (Q2022). **, P < 0.01.

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Plant Disease @plantdiseasej.bsky.social · 04/10/2026

Shirley Marcou et al. present the most comprehensive survey to date of #Rhizoctonia solani and related fungi across major field crops in Sweden, focusing on the southern agricultural region Scania: doi.org/10.1094/PDIS-08-25-1754-RE

Fig. 2. Distribution of Rhizoctonia and related fungal isolates among the five major crop groups in Sweden (Fabaceae, primarily pea; carrot; sugar beet; potato; and Brassicaceae) and the anastomosis group (AG) composition within the three most represented crops. The central pie chart shows the relative number of isolates collected from each crop group, with Fabaceae (primarily pea), carrot, and sugar beet being the most dominant. Surrounding pie charts depict the AG distribution (expressed as percentages) within pea, carrot, and sugar beet.

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Plant Disease @plantdiseasej.bsky.social · 03/10/2026

A previously undocumented and economically significant fruit rot disease has emerged on apple during cold storage in China. Xiaofei Liang et al. identified #Neocyphella psychrotropha sp. nov. as the causal agent—representing a new family in Agaricales: doi.org/10.1094/PDIS-08-25-1642-RE

Fig. 3. Pathogenicity assessment of Neocyphella psychrotropha (isolate LC01) on ‘Fuji’ apple. A, Wound-inoculated fruit at 30 days postinoculation (dpi) at 20°C (scale bar = 1 cm). B, Unwounded inoculation at 30 dpi (20°C), with an infection rate of approximately 10%. C, Wound-inoculated fruit stored after 6 months at −1°C. D, Leaf inoculation treatments: M-U (mock-unwounded), M-W (mock-wounded), I-U (inoculation-unwounded), and I-W (inoculation-wounded), imaged at 7 dpi/20°C.

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Plant Disease @plantdiseasej.bsky.social · 03/10/2026

In 2023, an unusual outbreak of soybean root rot (SRR) was observed in Harbin, Heilongjiang Province, China. Jing Zhang et al. report the first known report of SRR caused by #Colletotrichum sojae in China: doi.org/10.1094/PDIS-06-25-1180-RE

Fig. 1. A, Soybean root rot caused by Colletotrichum sojae in the field. B, The top and bottom of a C. sojae isolate colony on potato dextrose agar. C, Soybean root inoculated with C. sojae reisolated from the pathogenicity assays. D, Conidia. E, Conidiophore of C. sojae.

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Plant Disease @plantdiseasej.bsky.social · 02/10/2026

#Puccinia coronata f. sp. avenae (Pca) is a threat to oat production in Australia. Through virulence and genomic analysis of Pca isolates collected across Australian oat-producing regions, Zhouyang Su et al. identified new races and a new lineage: doi.org/10.1094/PDIS-11-25-2239-SC

Fig. 2. A maximum-likelihood (ML) phylogenetic tree of 380 Puccinia coronata f. sp. avenae isolates worldwide. A midpoint-rooted ML tree was constructed using 396,452 biallelic single-nucleotide polymorphisms, with 500 bootstrap replicates. Bootstrap support values ≥80% are indicated by white circles. Isolates collected in 2024 are shown with bold text. Previously characterized Australian lineages (L1 to L18) are shown with brackets. The newly described L19 is indicated with a star. Scale bar represents mean substitutions per site.

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Plant Disease @plantdiseasej.bsky.social · 01/10/2026

“Antifungal Properties and Genomic Analysis of Burkholderia pyrrocinia DLL-114, an Endophyte of Camphor Tree,” by Yixuan Ning et al. Learn more: doi.org/10.1094/PDIS-09-25-2010-RE

Fig. 3. Antagonistic effect of DLL-114 against plant pathogens. A, Botryosphaeria dothidea BDAY; B, Botrytis cinerea CMH; C, Alternaria tenuis COCG; D, Pyricularia grisea DW; E, Colletotrichum gloeosporioides CGAR; F, C. fructicola HML28; G, Nigrospora sphaerica LQH; H, Neofusicoccum parvum NPAU; I, A. tenuis OSF; J, Phomopsis vexans PV; K, C. boninense Co-zyc; L, Diaporthe pseudooculi DE; M, Fusarium oxysporum PKW; N, Rugonectria castaneicola NSZrc; O, Pestalotiopsis choerospondicola sp. nov. pc2-1.

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Plant Disease @plantdiseasej.bsky.social · 01/10/2026

Saffron corm rot, caused by #Fusarium oxysporum, has become a devastating threat to saffron cultivation in Shangri-La, China. Findings from Mingjia Wen et al. reveal the #rhizosphere ecological mechanism underlying corm rot progression: doi.org/10.1094/PDIS-07-25-1456-RE

Fig. 2. Disease progression of Crocus sativus bulb rot at different time points A, 0 h (control); B, 72 h; C, 96 h; and D, 120 h (scale bar = 10 mm).

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Plant Disease @plantdiseasej.bsky.social · 01/10/2026

Chenming Liu et al. systematically investigated the population structure, distribution of avirulence genes, and pathogenicity of #Magnaporthe oryzae using 174 monosporic isolates collected in 2021 from three counties in Hunan, China. Learn more: doi.org/10.1094/PDIS-09-25-1957-RE

Fig. 1. Resistance rate of monogenic lines against Magnaporthe oryzae in three different ecological regions of Hunan Province in 2021.

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Plant Disease @plantdiseasej.bsky.social · 30/09/2026

“Prevalence and Persistence of Oxytetracycline-Resistant and Copper-Tolerant Xanthomonas arboricola pv. pruni in Peach Orchards of the Southeastern United States,” by Milan Panth et al. Learn more: doi.org/10.1094/PDIS-08-25-1751-RE

Fig. 2. Visualization of leaf defoliation using a bubble chart as a function of bacterial spot incidence and severity on peach leaves. The defoliation is represented by the size and color of the sphere where smaller, blue-colored bubbles indicate minimal defoliation, and larger, red-colored bubbles indicate higher defoliation. Data from 2021 to 2024 from South Carolina orchards were compiled and analyzed to produce this figure.

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Plant Disease @plantdiseasej.bsky.social · 29/09/2026

Karen B. Torres-Valenzuela et al. revealed a diverse range of fungi associated with dieback and trunk cankers in pecan orchards in Sonora, Mexico, including #Pseudofusicoccum stromaticum, #Lasiodiplodia brasiliensis, and #Diaporthe caatingaensis: doi.org/10.1094/PDIS-10-25-2057-RE

Fig. 2. Pecan trees exhibiting dieback symptoms in orchards from Hermosillo, Sonora, Mexico. A to D, Symptoms observed in the trees. E to G, Cankers and wood damage.

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Plant Disease @plantdiseasej.bsky.social · 29/09/2026

Findings from Simranjot Kaur, Katia Viana, and Hardev Sandhu highlight the vulnerability of current sugarcane varieties to pineapple sett rot, especially under mechanical planting systems where smaller seedcane pieces are used. Learn more: doi.org/10.1094/PDIS-10-25-2050-RE

Fig. 1. The signs and symptoms of pineapple sett rot observed on the diseased seedcane collected from 3- to 4-month-old sugarcane fields at Everglades Agricultural Area. A, A gap in the field row showing dieback of a young shoot. B, Dead bud observed on the seedcane removed from soil. C, Internal discoloration or blackening of pith observed when the seedcane was split open. Front (D) and back (E) view of Thielaviopsis spp. cultures on potato dextrose agar media, and macroconidia (F) and microconidia (G) as observed under the light microscope.

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Plant Disease @plantdiseasej.bsky.social · 28/09/2026

Fengnian Wu et al. provide a species-resolved, region-wide assessment of #Cephaleuros red rust in China’s major oolong tea production areas and reveal pronounced geographic partitioning of pathogen communities: doi.org/10.1094/PDIS-12-25-2495-RE

Fig. 4. Microscopic features of Cephaleuros infection on oolong tea (Camellia sinensis) leaves in Fenghuang, Chaozhou, Guangdong. A, Enlarged upper surface lesion. B, Tufts of sporangiophores with zoosporangia on the lower surface at a lesion. C, Higher-magnification view of sporangiophore tufts with zoosporangia. D, Initial infection site with immature gametangia (ga). E, Transverse section of a lesion showing subepidermal thalli (arrows) beneath both surfaces, with necrosis of epidermal (ep), palisade (ps), and spongy (sp) tissues. F, Transverse section of a healthy leaf. Images in A, B, E, and F were taken at 100× magnification, and images in C and D were taken at 400× magnification.

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Plant Disease @plantdiseasej.bsky.social · 28/09/2026

“Improving the Implementation of Disease Forecasting Systems and an Alternative Management Program to Mitigate Regulatory Concerns with Multisite Fungicides for Apple Scab Management,” by Līga A. Kalniņa and Kerik D. Cox: doi.org/10.1094/PDIS-07-25-1551-RE

Fig. 1. Apple scab incidence at the end of the standard-season management trial on fruit (A and C) and on terminal leaves (B and D). ‘Empire’ (A and B) and ‘Jonagold’ (C and D) cultivars in 2022 and 2023. Within each graph, different letters above bars indicate significant differences between means based on Tukey’s honestly significant difference test (P < 0.05). DSS = decision support system.

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Plant Disease @plantdiseasej.bsky.social · 27/09/2026

Xiaoxue Ji et al. found that fluopyram not only exhibited strong nematicidal activity against Heterodera glycines but also induced systemic resistance in soybean. Learn more: doi.org/10.1094/PDIS-10-25-2124-RE

Fig. 1. Nematode mortality and LC50 and LC90 of fluopyram and abamectin against Heterodera glycines second-stage juveniles. LC50 and LC90 mean the 50 and 90% lethal concentration, respectively. Data are pooled between repeats of experiments as there were no significant differences between experiments (P > 0.05).

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Plant Disease @plantdiseasej.bsky.social · 27/09/2026

Di Liu et al. investigated the temporal and spatial dynamics of the #Fusarium graminearum species complex associated with Fusarium head blight in wheat from 2014 to 2023 in Mexico. Learn more: doi.org/10.1094/PDIS-01-26-0064-RE

Fig. 1. Geographic distribution of sampling sites in Mexico and yearly distribution of isolates collected across all locations from 2014 to 2023, excluding 2020.

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Plant Disease @plantdiseasej.bsky.social · 27/09/2026

Nidà M. Salem et al. establish gradual heat treatment as a robust, nonchemical, and commercially viable strategy to manage tomato brown rugose fruit virus in tomato seeds and highlight the critical importance of bioassays in certifying seed health: doi.org/10.1094/PDIS-10-25-2187-RE

Fig. 3. Transmission electron microscopy reveals virion degradation. A, Heat-treated, tomato brown rugose fruit virus (ToBRFV)-contaminated seeds show fragmented and degraded viral particles. B, Untreated, ToBRFV-contaminated seeds show intact, rod-shaped virions. Scale bars = 500 nm.

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Plant Disease @plantdiseasej.bsky.social · 26/09/2026

“Low Diversity of Isolates of Calonectria ilicicola, the Causal Agent of Red Crown Rot of Soybean, Detected Across Illinois,” by Steven J. Clough et al. Learn more: doi.org/10.1094/PDIS-07-25-1424-SC

Fig. 1. Examples of red crown rot (RCR) disease symptoms and signs of the pathogen (Calonectria ilicicola) on soybean at a field in our Illinois surveys.

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Plant Disease @plantdiseasej.bsky.social · 26/09/2026

Sarita Poudel et al. demonstrate that early maturity soybean lines, which are essential for northern production regions, harbor meaningful and stable resistance to #Sclerotinia sclerotiorum that has been largely overlooked in previous research: doi.org/10.1094/PDIS-11-25-2197-RE

Fig. 1. The map illustrates the geographic diversity of selected soybean plant introduction (PI) lines from the United States Department of Agriculture-Germplasm Resources Information Network. All PI lines are defined as maturity groups 000, 00, 0, and I. The number next to each country name indicates the number of PI selected from each country to be evaluated for resistance to Sclerotinia sclerotiorum. The legend on the right-hand side also demonstrates a heat map of the number of PI lines selected from each country.

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Plant Disease @plantdiseasej.bsky.social · 25/09/2026

Hainan, China has experienced widespread foliar diseases in its durian orchards. Field surveys conducted between October 2023 and October 2024 and molecular analysis led Huan Xu et al. to identify six causal #Fusarium species: doi.org/10.1094/PDIS-01-26-0070-SC

Fig. 1. Symptoms of the diseased durian leaves with only Fusarium isolates obtained.

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Plant Disease @plantdiseasej.bsky.social · 24/09/2026

Findings from Edison Reyes-Proaño et al. suggest alfalfa fields in Idaho and other Pacific Northwest states provide reservoirs for the local isolates of pea streak virus that may pose a risk for pulse crop production. Learn more: doi.org/10.1094/PDIS-09-25-1861-RE

Fig. 2. Foliar symptoms observed in pea streak virus (PeSV)–positive plant species screened in host range studies at 2 weeks postinoculation (WPI).

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Plant Disease @plantdiseasej.bsky.social · 24/09/2026

“Development and Validation of a Real-Time RT-qPCR Assay for the Detection of Citrus Yellow Vein Clearing Virus,” by Fatima Osman et al. Learn more: doi.org/10.1094/PDIS-10-25-2122-RE. And learn more about DAVN: www.apsnet.org/DAVN/Pages/default.a…

Fig. 1. Symptoms of Citrus yellow vein clearing virus on lemon trees in Tulare, California. Yellow vein clearing dorsal side (A), water-soaked veins ventral side (B), nonsymptomatic leaf (C, left) and symptomatic leaf (C, right) showing yellow vein clearing and leaf deformation. Photos by G. Vidalakis and S. Bodaghi.

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Plant Disease @plantdiseasej.bsky.social · 24/09/2026

Elizabeth J. Indermaur et al. confirmed a new species of #Didymella from the eastern U.S. is a pathogen of invasive #Reynoutria japonica but is a poor candidate for biological control because of its ability to infect the crop species Rheum rhabarbarum: doi.org/10.1094/PDIS-05-25-1125-RE

Fig. 4. Disease symptoms caused by Didymella spp. on polygonaceous hosts. A and B, Reynoutria japonica inoculated with Didymella polygonacearum. C and D, Rheum rhabarbarum ‘Victoria’ inoculated with D. polygonacearum. E, Rh. rhabarbarum ‘Victoria’ inoculated with Didymella rhei, a known pathogen of Rheum spp. All leaves pictured are <6 cm in length.

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Plant Disease @plantdiseasej.bsky.social · 23/09/2026

Wenxuan Yang et al. developed a reverse transcription recombinase polymerase amplification combined with lateral flow strip assay for on-site detection of rice stripe virus, rice black-streaked dwarf virus, and southern rice black-streaked dwarf virus: doi.org/10.1094/PDIS-02-25-0329-SR

Fig. 1. The results of the RT-RPA-LF assay for RSV, RBSDV, and SRBSDV.

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Plant Disease @plantdiseasej.bsky.social · 22/09/2026

By integrating data from public databases, Zheng Zhang et al. constructed an up-to-date atlas of plant viruses and further established the Plant Virus Database for storing and organizing information about these viruses: doi.org/10.1094/PDIS-07-25-1393-SR

Fig. 3. Evolution of virome in monocots and eudicots. The inner ring represents monocot and eudicot members of the phylogenetic tree; the middle ring shows their corresponding plant orders; the outer ring indicates whether plants are from temperate or tropical regions. The outer bar chart displays the number of virus families infecting each plant.

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Plant Disease @plantdiseasej.bsky.social · 22/09/2026

🌾 Mritunjoy Barman et al. conducted a statewide sampling during the 2023 to 2025 growing seasons across Nebraska to examine the infection dynamics of the causal agents of wheat streak mosaic disease in winter and spring cereal crops. Learn more: doi.org/10.1094/PDIS-09-25-1876-RE

Fig. 2. Symptoms in the sampled fields and collected leaves.

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Plant Disease @plantdiseasej.bsky.social · 21/09/2026

Feature: “Modern Taxonomy as the Foundation for Identifying and Managing Fungal and Fungus-Like Plant Pathogens,” by Michael J. Bradshaw et al. Learn more: doi.org/10.1094/PDIS-12-25-2537-FE

Fig. 2. Examples of plant diseases discussed in this study and the species involved.

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Plant Disease @plantdiseasej.bsky.social · 21/09/2026

Editor’s Pick: Wei-Ting Chuang et al. clarify the etiology of fungal gummosis disease in flowering cherries in Taiwan and demonstrates fungicide application strategies with potential for broader management of fungal trunk diseases in urban landscapes: doi.org/10.1094/PDIS-10-25-2065-RE

Fig. 1. Gummosis and canker symptoms in the flowering cherry and cotton tree. A, Clear to dark amber gum exudation from the trunk of Prunus campanulata. B, Internal wood browning and gum oozing beneath the bark. C, Wart-like swellings on a cherry branch (unknown species). D, Black cankers on the trunk of Bombax ceiba.

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Plant Disease @plantdiseasej.bsky.social · 16/09/2026

Zhenyu Zhao et al. found α-pinene exhibits promise as a natural substitute for synthetic fungicides or as a building block for the creation of novel fungicides to combat rice sheath blight, caused by #Rhizoctonia solani: doi.org/10.1094/PDIS-10-25-2055-RE

Fig. 2. Effect of α-pinene on hyphal morphology of Rhizoctonia solani. A, The mycelium, B, result observed by the optical microscope, and C, result observed by the scanning electron microscope of normal R. solani. D, The mycelium, E, result observed by the optical microscope, and F, result observed by the scanning electron microscope of R. solani treated with α-pinene (1.0 mg/ml).

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Plant Disease @plantdiseasej.bsky.social · 15/09/2026

“Spatiotemporal Distribution, Mechanisms, and Field Efficacy of Tebuconazole Resistance in Blumeria graminis f. sp. tritici (Bgt) Populations in Hebei, Henan, and Shandong Provinces, China,” by Qiuyan Bi et al. Learn more: doi.org/10.1094/PDIS-10-25-2160-RE

Fig. 5. Pathogenicity of sensitive and resistant Blumeria graminis f. sp. tritici (Bgt) isolates to wheat. HNLZ-3, HNHB-3, HBLC-3, HBYX-3, and SDTS-7 are sensitive isolates, and the rest are resistant isolates.

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Plant Disease @plantdiseasej.bsky.social · 15/09/2026

Duoduo Wang et al. present the first study in Canada to evaluate the efficacy of fungicides for managing #Fusarium head blight in winter rye. Learn more: doi.org/10.1094/PDIS-09-25-1884-RE

Fig. 1. A, Treatment means of Fusarium head blight (FHB) severity across varieties; B, variety means of FHB severity across treatment. UUC, uninoculated-untreated control; H, heading; 10A, 10% anthesis; 80A, 80% anthesis; 6DA50A, 6 days after 50% anthesis; and IUC, inoculated-untreated control. The dots indicate the means, and the horizontal bars indicate the asymptotic lower and higher confidence limits. Means with different letters are significantly different at P < 0.05.

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Plant Disease @plantdiseasej.bsky.social · 14/09/2026

Banana anthracnose severely affects banana yield and quality. Results from Xiaoying Xie et al. show that #Bacillus velezensis GX0003742 exhibits promising biocontrol potential against banana anthracnose through multiple antifungal mechanisms: doi.org/10.1094/PDIS-07-25-1519-RE

Fig. 8. Effect of active substances on the hyphae of Colletotrichum musae. A and B, Light microscopy. Red arrows indicate the location of hyphal rupture observed under the microscope. C and D, Scanning electron microscope.

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Plant Disease @plantdiseasej.bsky.social · 14/09/2026

Findings from Pawan Basnet et al. highlight that continuous planting of soybean containing resistance genes can lead to shifts in soybean cyst #nematode populations toward more virulent types. Learn more: doi.org/10.1094/PDIS-09-25-1939-RE

Fig. 3. GLMM effects for SCN female index across different HG type indicator lines and experimental years. * Significant at P ≤ 0.05 ** Significant at P ≤ 0.01 *** Significant at P ≤ 0.001.

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Plant Disease @plantdiseasej.bsky.social · 13/09/2026

Pine wilt disease, caused by the pinewood #nematode (PWN) #Bursaphelenchus xylophilus, devastates pine forests worldwide. Sai-Nan Li et al. investigated the nematicidal activity of volatile organic compounds released from Wolfiporia hoelen against PWN: doi.org/10.1094/PDIS-09-25-2002-RE

Fig. 1. Assay methods for nematicidal volatiles emitted by fungi.

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Plant Disease @plantdiseasej.bsky.social · 11/09/2026

Demand for organic products continues to increase in the United States. Courtney C. Meeks, Drew W. Benish, and Leslie A. Holland examined the impact of an organic fungicide program on disease severity in ‘Petite Pearl’ vineyards in Wisconsin: doi.org/10.1094/PDIS-07-25-1560-RE

Fig. 1. Average disease progression for the 2022 season at site 1 and corresponding climate data. Data displayed were collected from 23 May (week 1) until 22 September (week 17). In the top graph, weather data are displayed with precipitation represented by the bar graph, and average temperature is depicted by the line graph. In the bottom graph, each point represents the average disease severity (across all pathogens) across all blocks with the organic treatment displayed by the solid line and the standard treatment displayed by the dotted line.

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Plant Disease @plantdiseasej.bsky.social · 11/09/2026

Findings from Noor E. Mujjassim et al. not only validated the stability of previously reported loci but also uncovered novel QTLs, thereby enriching the current understanding of the genetic basis of southern corn rust resistance: doi.org/10.1094/PDIS-09-25-1838-RE

Fig. 6. QTLs showing epistatic interaction for resistance to southern corn rust disease detected in doubled haploid mapping populations 1 and 2 (MP1 and MP2) derived from the cross PL#09 × PL#07 and PL#08 × PL#07. QTLs = quantitative trait loci.

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Plant Disease @plantdiseasej.bsky.social · 10/09/2026

Jiaxin Tian et al. assessed the ecological characteristics and vector-driven mechanisms of rice viral diseases in a tropical island agroecosystem. Learn more: doi.org/10.1094/PDIS-06-25-1330-RE

Fig. 1. Spatiotemporal patterns of rice virus incidence in the tropical hotspot region of Hainan Island.

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Plant Disease @plantdiseasej.bsky.social · 10/09/2026

Findings from Jules Butchacas et al. mark the first detection of #Pseudomonas coronafaciens pv. coronafaciens in Idaho and the first detailed description of the pathogen in the United States after over half a century. Read the open access article: doi.org/10.1094/PDIS-08-25-1717-RE

Fig. 1. Symptoms of bacterial halo blight (BHB) on oat disease caused by Pseudomonas coronafaciens pv. coronafaciens (Pcc) A, in the field in Aberdeen, Idaho, in 2023; and B, on oat leaves collected from the field. C, Colonies of Pcc on Wilbrink’s media.

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Plant Disease @plantdiseasej.bsky.social · 09/09/2026

Results from Francisco Franco-Navarro, Andreas Westphal, and Antoon T. Ploeg showed that the N gene in pepper confers resistance to Meloidogyne incognita but not to M. floridensis, whereas the Me gene confers resistance to both species. Learn more: doi.org/10.1094/PDIS-07-25-1396-RE

Fig. 2. Development of Meloidogyne incognita at five time intervals after inoculation with second-generation juveniles (1, 3, 7, 15 and 30 days postinoculation [dpi]) in roots of bell pepper ‘Baron’ (Ba), bell pepper ‘Carolina Wonder’ (CW), and rootstock ‘Bedrock’ (BR).

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Plant Disease @plantdiseasej.bsky.social · 09/09/2026

In a stripe rust hot spot in China, wheat cultivar Lanhangxuan 122 provided valuable adult-plant resistance. Ying Guo et al. identified three stable QTLs, candidate genes, and KASP markers to support wheat breeding for durable resistance: doi.org/10.1094/PDIS-11-25-2203-RE

Fig. 4. Phenotypes of stripe rust severity in F6:7 lines from the cross between Huixianhong and Lanhangxuan 122 carrying different resistance genes.

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Plant Disease @plantdiseasej.bsky.social · 08/09/2026

Rice blast disease increased across Korea in 2020 and 2021, contributing to reduced rice production. Dan-Dan Zhao et al. characterized the race structure and virulence diversity of rice blast isolates from major rice-producing provinces. Learn more: doi.org/10.1094/PDIS-10-24-2199-SR

Fig. 1. Regional incidence of rice leaf blast and rice panicle blast in Korea from 2020 to 2022. A, Regional incidence of rice leaf blast from 2020 to 2022. B, Regional incidence of rice panicle blast from 2020 to 2022. Colors on the map and color scales indicate the incidence levels of rice leaf blast and rice panicle blast. Numbers indicate the incidence areas in hectares (ha).

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Plant Disease @plantdiseasej.bsky.social · 08/09/2026

“Comparison of NbRdRp1 Expression in Domesticated and Wild Accessions of Nicotiana benthamiana and Their Crosses Infected by a Native Australian Tobamovirus,” by Weinan Xu et al. Learn more: doi.org/10.1094/PDIS-05-25-1064-RE

Fig. 1. Real-time PCR amplification of RdRp1 sequences from Nicotiana benthamiana accessions. Lane 1: 100-bp DNA ladder (Axygen). Lane 2: LAB (RA-4) (NbRdRp1m). Lane 3: MtA-6 (NbRdRp1). Lane 4: F1 hybrid (NbRdRp1/1m) from a cross between LAB and MtA-6. Lane 5: negative control.

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Plant Disease @plantdiseasej.bsky.social · 07/09/2026

Although efficacy was lower than typically reported for conventional fungicides, Ewumi Azeez Folorunso et al. found that ozone nanobubbles offer a potentially safer, residue-free alternative for integrated pest management of cucumber powdery mildew: doi.org/10.1094/PDIS-09-25-1819-RE

Fig. 3. The effects of ozone nanobubbles on cucumber powdery mildew in a 20-day bioassay. A, Leaves treated with distilled water after 20 days of the treatment, and B, leaves treated with 0.5 mg liter−1 after 20 days under 65 to 73% relative humidity conditions.

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Plant Disease @plantdiseasej.bsky.social · 07/09/2026

Root rot threatens the yield and quality of wolfberry, an important economic and medicinal crop. Yanbo Wang et al. found that combined inoculation with #Rhizophagus intraradices and #Metarhizium significantly reduced disease incidence and severity: doi.org/10.1094/PDIS-07-25-1477-RE

Fig. 1. The mycorrhizal colonization structure and colonization rate of wolfberry roots. A to C, Rhizophagus intraradices colonization structure; D, noninoculated control (CK); E, mycorrhizal colonization rate. Different lowercase letters indicate significant differences between different treatments (P < 0.05). s: spores; eh: extraradical hyphae; v: vesicles; ih: intraradical hyphae; ar: arbuscule.

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Plant Disease @plantdiseasej.bsky.social · 06/09/2026

New high-oleic acid safflower lines faced widespread disease outbreaks in Western Australia in 2022. Mark F. Fisher et al. identified #Alternaria sect. Alternaria and #Stemphylium eturmiunum as causal agents: doi.org/10.1094/PDIS-07-25-1372-SR

Fig. 1. Safflower disease symptoms observed on leaves, stems and flower heads.

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Plant Disease @plantdiseasej.bsky.social · 05/09/2026

Rice kernel smut, caused by #Tilletia horrida, poses a major threat to rice production in the United States. Sabin Khanal et al. assess the resistance of T. horrida isolates to propiconazole and seek to identify the molecular basis of the resistance: doi.org/10.1094/PDIS-08-25-1685-RE

Fig. 2. In the initial experiment, the binary method of presence and absence of fungal growth was utilized to assess the baseline sensitivity. The growth of three Tilletia horrida isolates, CA-8, CA-9, and CA-10, collected from organic rice on potato dextrose agar (PDA) amended with propiconazole at 0, 0.0125, 0.025, 0.05, 0.1, and 0.2 mg/liter. None of the three isolates exhibited growth at the concentration of 0.2 mg/liter.

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Plant Disease @plantdiseasej.bsky.social · 04/09/2026

The last studies of wheat stem rust in Jordan date to the late 1980s. Kholoud M. Alananbeh et al. conducted a national survey to assess the virulence and genetic diversity of #Puccinia graminis f. sp. tritici and durum wheat responses to infection: doi.org/10.1094/PDIS-10-25-2026-RE

Fig. 2. Infection types produced by races TKKTF (isolate 18JOR175-01) and TKFTF (isolate (18JOR171-01) of Puccinia graminis f. sp. tritici on genotypes carrying stem rust resistance genes Sr35, Sr47, and Sr1RSAmigo.

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Plant Disease @plantdiseasej.bsky.social · 04/09/2026

Pei-Shan Wu et al. identified MfHS1, a gene that is significantly upregulated during the initial stages of infection, as correlating with virulence in #Monilinia fructicola. Learn more: doi.org/10.1094/PDIS-10-25-2125-RE

Fig. 3. Hyphal tips of Bmpc7 and MfHS1 knockout and complemented transformants.

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Plant Disease @plantdiseasej.bsky.social · 03/09/2026

#Gnomoniopsis smithogilvyi, the causal agent of brown rot, is a threat to chestnut production. Giorgia Bastianelli et al. compare the in vitro efficacy of 15 different chemical and biologically based fungicides against G. smithogilvyi. Learn more: doi.org/10.1094/PDIS-07-25-1563-RE

Fig. 1. Inhibition of mycelial radial growth and conidial germination for the isolate MIFCC217 with Tilt. 0% inhibition = UTC (PDA without fungicide); 50% inhibition = EC50 (0.010 ± 0.003 μl/liter for mycelial radial growth and 0.024 ± 0.016 μl/liter for conidial germination); 100% inhibition = 0.1 μl/liter for mycelial radial growth and 1 μl/liter for conidial germination.

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Plant Disease @plantdiseasej.bsky.social · 03/09/2026

Ihsanul Khaliq and Nolan R. Anderson present a comprehensive survey of the recently expanded cotton-growing area in the Northern High Plains of Texas and provide valuable insights into the #Fusarium species associated with cotton–corn rotation fields: doi.org/10.1094/PDIS-10-25-2121-SR

Fig. 2. Damage on roots of cotton seedlings inoculated with Fusarium species. Whole root systems were rated visually using a 0 to 5 rating scale. Left to right: 0 = no symptoms; 1 = <10% of roots discolored; 2 = 10 to 30% of roots discolored; 3 = 31 to 50% of roots discolored; 4 = 51 to 80% of roots discolored; and 5 = 81 to 100% of roots discolored.

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Plant Disease @plantdiseasej.bsky.social · 02/09/2026

Findings from Hui Yu et al. provide a scientific basis for the rational use of tebuconazole in controlling ginseng Alternaria leaf and stem blight. Learn more: doi.org/10.1094/PDIS-08-25-1682-RE

Fig. 8. Molecular docking of tebuconazole to the binding sites of the CYP51 protein from the sensitive parental isolate (A) and its resistant mutant (B) of Alternaria alternata.

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