#PlantDisease
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plantdiseasej.bsky.social
Bacterial leaf streak (BLS) is a threat to wheat production in the Northern Great Plains. To identify novel sources of BLS resistance, Subash Thapa et al. screened globally diverse bread wheat landraces and cultivars for BLS response: https://doi.org/10.1094/PDIS-05-25-1021-RE #PlantDisease
Fig. 1. Rating scale for infection types in wheat seedlings inoculated with Xanthomonas translucens pv. undulosa under greenhouse conditions.
October 16, 2026 at 10:29 PM
plantdiseasej.bsky.social
“Potato Black Scurf and Stem Canker: Pathogen Biology, Global Distribution, and Traditional and Modern Diagnostics,” by Aqleem Abbas et al. Read the latest Plant Disease Feature article—freely available in the September issue: https://doi.org/10.1094/PDIS-04-26-0711-FE #PlantDisease
Fig. 1. Symptoms of Rhizoctonia solani infection on potato.
October 14, 2026 at 9:10 PM
plantdiseasej.bsky.social
Editor’s Pick: “Spray-Induced Gene Silencing Targeting the Transcription Factor Bcmrr1: A Sustainable RNAi-Based Strategy to Control Botrytis cinerea and Overcome Multidrug Resistance,” by Alba López-Laguna et al. Learn more: https://doi.org/10.1094/PDIS-01-26-0043-RE #PlantDisease
Fig. 4. Influence of dsRNA treatments on the development of gray mold caused by isolates B05.10 and JEY2013.1 on apple fruit.
October 12, 2026 at 5:55 PM
plantphenomics.bsky.social
PlantIF: multimodal graph learning for plant disease diagnosis. Fuses image-text features via semantic encoders and self-attention GCN. 96.95% accuracy on 205K images. #PlantDisease #MultimodalLearning #PrecisionAgriculture
Details: doi.org/10.1016/j.pl...
September 25, 2026 at 12:51 PM
plantcarebasics.bsky.social
Snake plant fungus shows as brown spots with pinpoint black dots.

👉 See what invites it back: https://plantcarebasics.com/how-to-treat-snake-plant-fungus/?utm_source=bluesky&utm_medium=social&utm_campaign=snake-plant-care

#gardening #houseplants #plantdisease
How to treat snake plant fungus: an upright Dracaena trifasciata carries brown, black-dotted fungal leaf spots. Close-up of snake plant fungus: a sunken brown leaf spot ringed with tiny black dots on an upright snake plant blade. Close-up of a sterilized blade pruning a fungus-spotted snake plant leaf back to firm green tissue. An upright snake plant kept dry with steady airflow to stop the spread of fungus, pushing clean new central growth.
October 2, 2026 at 9:40 PM
plantphenomics.bsky.social
LViM fuses Mamba and Transformer via dual-path U-Net with language infusion, boosting apple leaf disease segmentation by 4.25% Dice and 4.49% mIoU in complex orchards. #LViM #PlantDisease #AgriTech
Details: doi.org/10.1016/j.pl...
September 4, 2026 at 11:56 AM
plantphenomics.bsky.social
We introduce PhenoTrait, a multimodal plant disease diagnosis model that outperforms GPT-4o by aligning images with expert text. Code & data public. #PlantDisease #MultimodalAI #OpenScience
Details: doi.org/10.34133/pla...
August 31, 2026 at 12:15 PM
vegplotter.com
Seeing brown, rotting stems on your beans, peas, or tomatoes? It could be foot rot. Act fast:
* Pull & burn affected plants
* Rotate crops over a 3-5 year cycle
* Use sterilised compost & pots for seedlings
* Ensure plants aren't stressed.
Prevention is key! #GardeningTips #PlantDisease
classic example of foot rot, with brown withered stem
August 20, 2026 at 8:01 PM
plantdiseasej.bsky.social
Leaf stripe is an important disease on highland barley in Qinghai Province, China. Guomei Bai et al. provide compelling evidence that #Pyrenophora graminea is the primary pathogen causing the disease. Learn more: https://doi.org/10.1094/PDIS-12-24-2564-RE #plantdisease
Fig. 5. Disease symptoms of Qingke cultivar Kunlun 14 caused by the tested strain. A and B, Leaf symptoms after pathogen infection. C, Symptoms of healthy leaves. D, Overall plant status after pathogen inoculation. E, Growth status of healthy plants.
August 17, 2026 at 5:41 PM
plantdiseasej.bsky.social
Hengming Luo et al. provide the first report on the distribution and variation of AVR-Pita3 in #Magnaporthe oryzae populations across rice-growing regions in Southwest China: https://doi.org/10.1094/PDIS-09-25-1912-RE #plantdisease
Fig. 2. Neighbor-joining phylogenetic tree of AVR-Pita3 among 188 isolates of Magnaporthe oryzae collected across rice-growing regions in Southwest China. AVR-Pita3 variants clustered into two distinct groups: cluster A comprises the haplotype H1 from Eleusine indica (same with GenBank accession DQ855958.1 from E. coracana), while cluster B contains the isolates of the haplotypes H2 to H5 from the Oryza sativa host. The haplotype H2 is the original haplotype of H3 to H5 in evolutionary courses.
August 11, 2026 at 6:45 PM
plantdiseasej.bsky.social
To evaluate the effectiveness of soybean leaf-associated gemygorvirus 1 against #Sclerotinia sclerotiorum, Shin-Yi Marzano et al. tested three formulations in greenhouse and field settings: https://doi.org/10.1094/PDIS-06-25-1215-RE #plantdisease
Fig. 2. In the greenhouse, tomato plants sprayed with fungal homogenate at optical density (OD600) 4.0 and 3.0 were visibly healthier than the heat-inactivated (HI) homogenate-sprayed controls. Both sprays showed a reduction in white mold symptoms when challenged with virulent Sclerotinia sclerotiorum, resulting in an improved yield. The average amount of sclerotia produced per plant at harvest was greatly reduced by fungal homogenate sprays at either OD of 3.0 or 4.0 (right). PF, particle filtrate.
August 10, 2026 at 4:25 PM
plantdiseasej.bsky.social
Longfei Wu et al. identified QTL associated with partial resistance to #Aphanomyces euteiches and Fusarium avenaceum in field pea and developed a consensus map of QTL controlling resistance to Aphanomyces and Fusarium root rots: https://doi.org/10.1094/PDIS-06-25-1147-RE #plantdisease
Fig. 1. Correlation analysis among best linear unbiased predictors (BLUPs) for disease severity (d), vigor (v), and plant height (h) in A, the RIL-1 population inoculated with Aphanomyces euteiches (AE), Fusarium avenaceum (FA), or Fusarium graminearum (FG), and B, the RIL-2 population inoculated with AE and FA. Note: r values > 0.3 are significant at P < 0.05.
August 9, 2026 at 12:08 AM
plantdiseasej.bsky.social
Begoña I. Antón-Domínguez et al. evaluated carob and pomegranate extracts as inducers of resistance against #Verticillium wilt in olive tree. Learn more: https://doi.org/10.1094/PDIS-05-25-1032-RE #plantdisease
Fig. 1. Relative expression of marker genes related to A, salicylic acid carboxyl methyltransferase (OeSAMT); B, TIFY transcription factor (OeTIFY); C, 9-cis-epoxy carotenoid dioxygenase (OeNCED); and D and E, polyphenol oxidases (OePPO1 and OePPO2) in stem and root samples from olive plants of cultivar Picual that were noninoculated and treated with pomegranate or carob extracts. The expression of each gene at each sampling time was relative to the first value on each graph (value = 1.0). For each graph, columns represent the mean of three replicated plants, and vertical bars the standard error of the means. For each graph, columns with different letters differ significantly according to Fisher’s protected LSD test at P = 0.05.
August 7, 2026 at 10:06 PM
niooknaw.bsky.social
New publication: #Spinach Seed #Microbiota Associated with #Globisporangium ultimum Disease Suppression Are Culturable and Prevalent. #seedmicrobiome #plantdisease
doi.org/10.1094/PHYT...
Figure 1 in Diakaki et al. (2026): "Visual representation of A, splitting whole seeds into compartment samples true seed and pericarp and B, the entire process from seed lot to whole seed sample, splitting into seed compartment samples, and preparation of microbial cultures."
August 7, 2026 at 9:25 AM
plantdiseasej.bsky.social
Usha Bhatta and Shavannor M. Smith found that maize-teosinte near-isogenic lines and teosinte are valuable genetic resources for enhancing #Ustilago maydis—the causal pathogen of corn smut disease—resistance in cultivated maize: https://doi.org/10.1094/PDIS-05-25-1023-RE #plantdisease 🌽
Fig. 1. Ustilago maydis inoculation methods at different developmental stages. A, Seedling stage: needle inoculation with U. maydis suspension culture (1 × 106 cells/ml) into the seedling stem above the soil line at the three-leaf stage. B, Ear stage: silk channel inoculation 4 to 6 days after silk emergence (silks shown at typical 4 to 5 cm length when inoculated). C, Tassel stage: leaf whorl inoculation 3 to 10 days before tassel emergence from the uppermost leaf sheath (red arrow). White latex gloves indicate points of inoculation.
August 2, 2026 at 4:38 PM
plantdiseasej.bsky.social
Leandro J. S. Shibutani, Isabela V. Primiano, and Renato B. Bassanezi found that reducing spray intervals can limit ‘Candidatus Liberibacter asiaticus’ transmission during periods of shoot growth and continuous vector pressure: https://doi.org/10.1094/PDIS-08-25-1758-RE #plantdisease
Fig. 1. Schematic representation of experiments
August 1, 2026 at 9:17 PM
plantdiseasej.bsky.social
Suman Parajuli, Mary Ruth McDonald, and David Wolyn developed a detached spear screen for purple spot (#Stemphylium vesicarium) on asparagus spears that correlates with natural field infection: https://doi.org/10.1094/PDIS-01-25-0216-RE #plantdisease
Fig. 2. Spear purple spot severity among four asparagus cultivars under different sucrose treatments for two replicate experiments in each of 2021 (A and B) and 2022 (C and D). The lower portions of inoculated spears were incubated in 0, 5, or 10% sucrose solutions. Mean ± SE (n = 3). Means with the same letter are not significantly different according to Tukey’s honestly significant difference test (P ≤ 0.05), both within and among cultivars at each sampling date.
August 1, 2026 at 7:30 PM
plantdiseasej.bsky.social
Matthew West, Olive LoGrasso, and Robyn Roberts developed a colorimetric LAMP bioassay to detect wheat streak mosaic virus and/or Triticum mosaic virus, using either RNA or cDNA as the genomic template. Learn more: https://doi.org/10.1094/PDIS-09-25-1938-RE #plantdisease
Fig. 4. Loop-mediated isothermal amplification (LAMP) bioassay schematic.
July 31, 2026 at 10:12 PM
plantdiseasej.bsky.social
Gracia Montilla-Bascon et al. evaluated a Mediterranean oat collection comprising over 700 Avena sativa and A. byzantina accessions to identify durable sources of resistance against a highly virulent Mediterranean rust isolate: https://doi.org/10.1094/PDIS-06-25-1136-RE #Puccinia #plantdisease 🌾
Fig. 3. Light micrographs showing examples of Puccinia coronata f. sp. avenae development and leaf mesophyll cell responses of oat accessions, viewed by incident fluorescence microscopy.
July 29, 2026 at 6:46 PM
umlegacypress.com
Cotton growers race to treat leaf disease after mysterious arrival: No-one knows how ramularia leaf spot got to Australia, but growers in Queensland are desperate for a treatment as the fungal disease wreaks havoc on their crops. #CottonIndustry #Agriculture #CropHealth #Farming #PlantDisease
Cotton growers race to treat leaf disease after mysterious arrival: No-one knows how ramularia leaf spot got to Australia, but growers in Queensland are desperate for a treatment as the fungal disease wreaks havoc on their crops. #CottonIndustry #Agriculture #CropHealth #Farming #PlantDisease
umlegacypressqsefc.com
July 27, 2026 at 8:37 PM
plantdiseasej.bsky.social
"Evaluating Pistachio Rootstock Tolerance to Phytophthora Root and Crown Rot," by Alejandro I. Hernandez-Rosas et al. Learn more: https://doi.org/10.1094/PDIS-10-25-2051-RE #plantdisease #Phytophthora
Fig. 1. Trial 1. Average stem lesion length of pistachio rootstocks wound-inoculated with Phytophthora mediterranea, Phytophthora niederhauserii, and Phytophthora taxon walnut. Bars with different letters indicate significant differences among rootstock × Phytophthora spp. interaction based on Tukey’s honestly significant difference test (α = 0.05). Vertical lines on columns are the standard error of the mean. PGI = Pioneer Gold I; UCBI = University of California Berkeley I.
July 27, 2026 at 7:21 PM
plantdiseasej.bsky.social
Carmen Luque-Cruz et al. explored the interaction between #Botryosphaeria dothidea and #Neofusicoccum parvum causing cankers in almond and effect of wood age on infection: https://doi.org/10.1094/PDIS-08-25-1734-RE #plantdisease
Fig. 2. Cankers developed on green (A) and lignified shoots (B) of potted almond plants of cultivar Avijor grafted on GF-677 rootstock at 2 and 12 months after inoculation, respectively, with conidial suspensions of Botryosphaeria dothidea and Neofusicoccum parvum. The following treatments were performed: noninoculated controls, single inoculations of B. dothidea or N. parvum, simultaneous inoculation with both pathogens (Bd × Np); B. dothidea and N. parvum, or N. parvum and B. dothidea, with the second species inoculated at 4 days after the first one in each case (Bd × Np-4d and Np × Bd-4d, respectively).
July 26, 2026 at 8:59 AM
plantdiseasej.bsky.social
#Pseudomonas syringae pv. actinidiae (Psa) threatens kiwifruit production worldwide. Lan Peng et al. developed assays that enable accurate discrimination between viable and dead Psa cells: https://doi.org/10.1094/PDIS-04-25-0907-SR #plantdisease
Fig. 5. Detection of viable Pseudomonas syringae pv. actinidiae (Psa) cells in field-collected kiwifruit pollen using PMA-PCR (A) and PMA-LAMP (B). Lanes 1 to 28 represent individual pollen samples collected from a commercial kiwifruit orchard. PMA treatment was performed under optimized conditions: 130 μg/ml PMA, 5 min of dark incubation, and 20 min of light exposure to a 650-W halogen lamp. CK+, positive control, 50 ng/μl genomic DNA of Psa. NC, negative control, sterile water. PMA, propidium monoazide; LAMP, loop-mediated isothermal amplification; qPCR, quantitative polymerase chain reaction.
July 25, 2026 at 9:15 PM
phytopathology.bsky.social
“Evolutionary Relationships and a Tree-Based Alignment Selector Interactive Phylogeny of the Emerging Lineages of the Plant Pathogen Phytophthora ramorum,” by Amanda Mainello-Land et al. Learn more: https://doi.org/10.1094/PHYTO-07-25-0248-R #Phytophthora #plantpathology #plantdisease
Fig. 1. Tree-Based Alignment Selector (T-BAS) phylogeny of 12 lineages of Phytophthora ramorum. The maximum likelihood phylogeny (center) was inferred using concatenated sequences of six nuclear loci (avh120, avh121, btub, gweuk.30.30.1, hsp90, and trp1) and 1,000 bootstrap replicates in IQ-TREE. Colors on the inner ring represent the lineages of P. ramorum as defined in source publications. Colors on the middle ring represent the isolate's country of origin. Colors on the outer ring represent the host type. Branches are not drawn to scale. Percent bootstrap support is noted on each node.
July 25, 2026 at 12:03 AM
plantdiseasej.bsky.social
The #Colletotrichum species responsible for apple bitter rot have distinct regional distributions. Michael S. McLaughlin, Pervaiz A. Abbasi, and Shawkat Ali provide critical insights for managing bitter rot in Nova Scotia: https://doi.org/10.1094/PDIS-05-25-0942-RE #plantdisease
Fig. 2. Morphological characteristics of the identified Colletotrichum species.
July 23, 2026 at 8:34 PM