A microscopic atlas reveals how citrus Huanglongbing disease develops over time, causing phloem cell death and callose deposition in leaves and fruit tissues. Roots experience starch depletion, driving root decay and nutrient deficiencies.
A new study estimates that corn diseases cost US farmers $13.8 billion from 2020 to 2023, resulting in reduced yields of 2.5 billion bushels. The top disease-causing pathogens were tar spot, Fusarium stalk rot, and plant-parasitic nematodes.
Researchers tracing the journey of Phytophthora infestans, a plant destroyer behind Ireland's Irish Potato Famine, explore its taxonomy and identification from early microscopy to genomic technologies. Advances in science strengthen efforts to monitor and manage destructive plant diseases.
Researchers developed a hybrid engine to predict sugar beet disease by combining drone images, weather data, and qPCR-based airborne spore monitoring. The system reduced prediction error by up to 39% and provided accurate forecasts of disease severity.
Researchers analyzed 48 isolates of P. griseola and found a potential symbiotic relationship between the fungus and endophytic bacterium Achromobacter xylosoxidans, influencing disease severity. The study sheds light on how the pathogen evolves and may point to new strategies for breeding disease-resistant crops.
Fusarium head blight (FHB) is a destructive wheat disease that can reduce yields and contaminate grain with toxins. New research in Plant Disease identified several emerging fungal pathogens, including a previously undescribed species, responsible for the severe outbreak in Ethiopia.
A new international study reveals that the ancestors of modern crop viruses likely emerged before the last Ice Age, affecting both wild and cultivated plants. The viruses, spread by leaf-eating beetles, infect various crops and wild species, posing risks to agriculture and natural ecosystems.
Researchers discover that resistant soybean varieties actively recruit beneficial soil microorganisms to suppress the devastating soybean cyst nematode. These microbes can be transferred to soil to help defend susceptible soybeans, providing a promising new approach for sustainable crop protection.
Researchers at FABI define a conserved subset of Phytophthora RxLR effectors with short linear motifs embedded within folded WY domain cores. This arrangement preserves domain integrity while enabling potential interactions with host immune components, reframing pathogen strategies and challenging SLiM dogma.
Researchers have identified novel sources of soybean resistance to cyst nematode that could help protect global soybean production. The study reveals a wealth of previously untapped genetic resistance to SCN by mining deep into soybean genomes.
Researchers have identified Aegilops cylindrica as a powerful genetic reservoir for resistance against the devastating fungal pathogen Zymoseptoria tritici. The study reveals novel mechanisms of immune suppression by the pathogen and offers new insights into plant immunity.
Researchers found that foxtail barley can harbor several fungal pathogens, including those causing net blotch, spot blotch, stem rust, stripe rust, and crown rust. The fungus infected up to 100% of the evaluated accessions, with varying degrees of compatibility
A new multiyear study reveals wheat disease losses totaling $2.9 billion in the US and Canada between 2018 and 2021. The top three yield-reducing pathogens were fusarium head blight, stripe rust, and leaf rust.
The third edition of Compendium of Cotton Diseases and Pests features significant updates and new content, including expanded focus on entomology and emerging diseases. Hundreds of new images enhance identification and diagnosis, making it a comprehensive guide for plant pathologists, agronomists, and growers.
A recent study reveals that foliar fungicides can alter the composition of beneficial fungi in corn leaves, highlighting the need to reassess crop management strategies. The research also suggests that sustainable practices promoting beneficial microbes could enhance crop resilience and yield.
The book explores lesser-known plant diseases that influenced human events, drawing from scientific insight and compelling narrative. Written for specialists and curious readers, it offers a new lens on plant pathology and environmental history.
The updated fourth edition of the Laboratory Guide for Identification of Plant Pathogenic Bacteria provides simplified identification methods and detailed protocols. The comprehensive volume covers conventional and cutting-edge methods, including molecular, serological, biochemical assays, to accurately identify bacterial plant pathogens.
Researchers discovered salicylic acid plays a central role in protecting potato roots from Spongospora subterranea, a soilborne pathogen causing powdery scab. The study used a cutting-edge 'hairy root' system to rapidly test root-pathogen interactions, providing vital insights for developing resistant potato varieties.
A new study has revealed that wheat plants actively influence the microbial communities living on and inside their roots, with certain microbes favored under dry conditions and others under irrigation. This dynamic relationship allows the plant to select its microbial partners, shaping its microbiome over time.
Researchers have identified a key player in the development of Fusarium head blight, a devastating disease that severely damages wheat and barley crops worldwide. The discovery of FgTPP1 could lead to the development of genetically engineered disease-resistant grains.
Researchers found cotton leafroll dwarf virus (CLRDV) infecting plants in southern US states as early as 2006, contradicting the assumption that it emerged more recently. The study used modern data-mining tools to uncover hidden threats and highlights the importance of maintaining accessible databases for disease surveillance.
The latest focus issue of Molecular Plant-Microbe Interactions explores the molecular, cellular, and genomic details of cereal crop diseases, highlighting key research on plant-pathogen interactions. Groundbreaking work has advanced the field, offering new insights into disease resistance and management strategies.
Researchers developed high-resolution risk maps to predict where charcoal rot occurs in soybean fields. The maps use measurable soil characteristics to assess risk across the landscape and identify hotspots for targeted approaches to managing the disease.
A new study confirms copper-based fungicides as a reliable solution for aerial stem rot in potatoes. The research found that copper fungicide treatments consistently slowed disease spread and improved yields over a 10-year period.
The Phytovirome Focus Issue addresses fundamental and translational aspects of phytovirome science, highlighting the transformative role of high-throughput sequencing technologies. Researchers discovered a remarkable diversity of viruses in plants, with complex communities interacting with hosts in both pathogenic and beneficial ways.
Researchers have identified a key protein responsible for nematode infection in soybeans, paving the way for the development of more resistant crops. By engineering 'decoy' proteins that trick nematodes into cleaving themselves, scientists aim to reduce reliance on chemical pesticides and lower agriculture's environmental impact.
Researchers have uncovered how soybean varieties respond to different types of nematode infections, revealing new insights into plant defense mechanisms. The study found that resistant plants activate genes involved in immune responses, while susceptible plants fail to do so, making them vulnerable to attack.
Scientists develop novel approach using Cry14 protein to combat soybean cyst nematode (SCN), a major soybean pest. The research demonstrates that Cry14 reduces SCN population in soybean roots, leading to higher yields and potential resistance against native traits.
The Compendium of Rose Diseases and Pests, Third Edition, is a comprehensive guide to diagnosing diseases, identifying pests, and expanding expertise in rose health management. Edited by industry experts, the book features over 50 contributing authors and provides practical guidance for students, researchers, educators, and professionals.
The impacts of natural disasters on plant health can be devastating, with the potential for direct effects from disasters like pathogen or vector dispersal. Human-driven disasters also create conditions favorable to the spread of plant pathogens, leading to crop loss and disease spread.
Researchers have identified 31 effector genes from the fungus Ceratocystis fimbriata, which causes devastating black rot in sweetpotatoes. This breakthrough provides a new approach to developing disease-resistant crops using effector-assisted breeding.
A recent study has provided significant genomic insight into tar spot of corn, a destructive disease causing $1.2 billion in yield loss. The researchers identified over 100 novel effectors that play a crucial role during infection, warranting further investigation.
The American Phytopathological Society has created a new series of distinguished reviews in honor of Harold H. Flor, who developed the gene-for-gene concept in plant pathology. The series presents authoritative reviews on molecular plant-microbe interactions, providing a historical perspective and future directions for research.
Researchers have discovered a gene, B5, in Egyptian cotton that confers powerful resistance to bacterial blight. The gene enables strong resistance to the disease under Oklahoma field conditions and accumulates high amounts of defense chemicals.
The American Phytopathological Society has published a focus issue on critical biosecurity gaps in US plant disease diagnostics, highlighting the need for harmonized diagnostics within the agricultural biosecurity system. The focus issue addresses assay validation methods, including high-throughput screening and PCR/RPA techniques.
Researchers have identified a new trichothecene, NX, produced by Fusarium graminearum, which contributes to the pathogen's ability to infect wheat and spread disease. Deleting the gene responsible for NX production reduces toxin levels and disease severity, providing potential control methods.
A recent study confirmed which genes in the HiVir cluster are essential and which contribute partially to the disease. The toxin produced by Pantoea ananatis has broad-spectrum activity, potentially targeting conserved functions within plants.
The American Phytopathological Society published a special issue on key discoveries in plant pathology, highlighting groundbreaking findings over the past 50 years. These discoveries have significantly impacted plant health, food security, and food safety worldwide.
A new identification tool called IDphy has been developed to accurately identify Phytophthora species, which cause significant economic and environmental losses. The tool uses data from ex-type cultures and includes features such as an interactive key, factsheets, and a mobile app.
A devastating fungal disease, Fusarium wilt of banana (FWB), caused by Tropical Race 4 (TR4) is spreading in Mozambique, jeopardizing banana production. The Cavendish banana variety is highly susceptible to the disease, and lack of access to on-farm data hinders effective containment.
A new strategy balances disease control with resistance management by balancing resistance to both fungicides until it increases enough to fail. The approach is robust to variations in parameters and could influence policy recommendations.
A new webcast on Grow: Plant Health Exchange presents an overview of the physiological drivers of yield in cotton. The presentation discusses factors influencing each driver and results from research with advanced breeding lines.
Researchers have discovered licorice leaf extract as a potent bactericide and fungicide, offering a sustainable alternative to synthetic pesticides. The extract modulates plant immune responses to pathogens and acts against resistant oomycetes, making it a potential solution for naturally controlling plant diseases.
A severe begomovirus-satellite DNA disease complex has been detected in okra fields in the lower Rio Grande Valley area of Texas, posing a significant threat to cotton production. The complex involves the exotic cotton leaf curl Gezira virus and its associated satellite DNA molecules.
A new webcast from the American Phytopathological Society provides insights into soil biophysical properties and nitrogen application rates in predicting cotton yield and quality. The study suggests including soil biophysical information in making N recommendations to maximize profits and reduce environmental impact.
A transnational collaboration led to the characterization of Physostegia chlorotic mottle virus (PhCMoV), a plant disease first identified in Austria in 2018. The study revealed that PhCMoV can infect at least nine plant species, causing severe fruit symptoms on economically important crops.
Researchers have characterized the tar spot pathogen on a molecular level, revealing its virulence molecules target specific plant organelles. This study advances our understanding of plant-pathogen interactions and contributes to developing disease control strategies.
Researchers have discovered that nutrient elements such as potassium, calcium, magnesium, and sodium can activate immune responses in tomato plants, leading to disease resistance. The study found that different defense signaling pathways are required for induction of immunity in response to different elements.
A recent study discovered a legume locus that stimulates promiscuous interaction with soil bacteria, forming nitrogen-fixing nodules with up to 30 different rhizobial strains. This finding opens the door for crop improvement by naturally promoting plant growth through symbiotic associations.
Wild potato varieties have evolved multiple resistance factors to combat pathogens like Pectobacterium species. Researchers have identified protease inhibitors that prevent bacterial malignance by interrupting their communication system and degrading plant cell walls.