plant pathology – Page 4

Seimatosporium chinense, a Novel Pestalotioid Fungus Associated with Yellow Rose Branch Canker Disease

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Researchers identified a new fungal disease affecting ornamental yellow roses in China. The disease causes branch cankers (sunken lesions) and was caused by a previously unknown fungus species named Seimatosporium chinense. By examining the fungus under microscopes and analyzing its DNA, scientists distinguished this new species from similar fungi. This discovery helps understand and manage diseases affecting ornamental rose plants.

Identification, biological characteristics, and screening of control agents against root rot of Ardisia crenata Sims in China

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Researchers identified a fungus called Fusarium cugenangense as the cause of root rot disease in Ardisia crenata, a valuable traditional Chinese medicinal plant. The disease was affecting 25-35% of plants in Chongqing farms and damaging their roots. Scientists tested various pesticides and found that fluazinam chemical spray and zhongshengmycin biological spray were the most effective at stopping the fungus, providing farmers with effective treatment options.

De novo Genome Assembly and Annotation of 12 Fungi Associated with Fruit Tree Decline Syndrome in ON, Canada

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Apple and stone fruit trees in Ontario have been dying at alarming rates since 2016. Researchers sequenced and analyzed the genetic code of 12 different fungi suspected of causing this decline. This study provides the first complete genetic blueprints for several fungal species, helping farmers and scientists better understand what causes the disease and develop ways to prevent it.

Fungal Argonaute proteins act in bidirectional cross-kingdom RNA interference during plant infection

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Scientists discovered that fungi and plants exchange genetic instructions called small RNAs to control each other during infection. A fungal pathogen called Botrytis cinerea uses special proteins called Argonautes to deliver these instructions into plant cells, which helps the fungus cause disease. Plants also send back their own genetic instructions to defend themselves. Understanding these molecular communications could lead to new ways to protect crops from fungal diseases.

Whole-genome sequencing of Fusarium oxysporum K326-S isolated from tobacco

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Scientists have sequenced the complete genetic code of a fungus called Fusarium oxysporum that infects tobacco plant roots, causing them to wilt and turn brown. This fungus is a major problem for tobacco farmers because it lives in soil and is difficult to control. By mapping out all 17,272 genes in this fungus, researchers now have detailed information that will help them develop better ways to prevent and manage this disease.

Neem Essential Oil as an Antifungal Agent against Phyllosticta citricarpa

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Citrus fruits are susceptible to a serious fungal disease called black spot that prevents them from being exported to certain countries. This study tested neem oil, a natural plant extract, as a replacement for chemical fungicides currently used to clean citrus fruits. The researchers found that neem oil was just as effective as the standard copper-based treatments at killing the fungus and preventing the disease, and it worked by breaking down the fungus cell membranes. This natural alternative could help farmers and fruit companies maintain food safety while using more eco-friendly solutions.

Hass Avocado (Persea americana Mill) Peel Extract Reveals Antimicrobial and Antioxidant Properties against Verticillium theobromae, Colletotrichum musae, and Aspergillus niger Pathogens Affecting Musa acuminata Colla Species, in Ecuador

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Researchers tested whether avocado peel waste could help protect banana crops from fungal diseases. They extracted beneficial compounds from avocado peels and tested them against three harmful fungi that affect bananas. The results showed the extract worked best against one type of fungus and had good antioxidant properties, suggesting avocado peel could be a natural and sustainable way to protect banana crops.

Genome sequencing and analysis of isolates of Cytospora sorbicola and Cytospora plurivora associated with almond and peach canker

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This study provides genetic blueprints for two dangerous fungal pathogens that damage almond and peach orchards by causing canker diseases. Scientists sequenced the complete genomes of these fungi and identified genes responsible for their ability to infect plants, finding that they’ve evolved special abilities to survive in nutrient-poor bark tissue. This genetic information could help farmers develop fruit trees resistant to these infections. The research also clarifies the identity of a newly described fungal species, showing it’s actually the same as a previously known species.

Phylogenetic diversity of Colletotrichum species (Sordariomycetes, Glomerellales, Glomerellaceae) associated with plant diseases in Thailand

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Researchers identified eight species of Colletotrichum fungi causing plant diseases in Thailand. They discovered two completely new species and found these fungi on 13 additional plant hosts previously unknown. Using DNA analysis, they confirmed the identity of each fungal species and documented their characteristics. This work helps farmers and scientists better identify and manage these damaging plant pathogens.

Essential Oils as an Antifungal Alternative to Control Several Species of Fungi Isolated from Musa paradisiaca: Part III

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Researchers tested six essential oils from common culinary herbs to control fungal diseases that damage bananas after harvest. Thyme, cinnamon, and oregano oils were most effective at preventing fungal growth at concentrations between 600-1000 parts per million. These natural oils could replace synthetic fungicides in banana storage facilities, providing a safer, more environmentally friendly approach to preserving fruit quality.

Research Topic: plant pathology