Research Topic: postharvest disease

Identification, Characterization, Pathogenicity, and Fungicide Sensitivity of Postharvest Fungal Diseases in Culinary Melon from Northern Thailand

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Researchers in Thailand identified four different fungi causing diseases in culinary melons after harvest. They found that three fungus species cause damage to stored melon fruits, significantly reducing their quality and value. By testing various fungicides, they determined which chemical treatments effectively stop each fungus type, helping farmers protect their crops and reduce losses.

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Context-Dependent Fitness Trade-Offs in Penicillium expansum Isolates Resistant to Multiple Postharvest Fungicides

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This research examines how apples and pears get a fungal disease called blue mold and how the fungus develops resistance to commonly used fungicides. Scientists tested fungus samples that resist different fungicides to see if this resistance makes them weaker. They found that resistant fungus strains do struggle more under stressful laboratory conditions, but remain dangerous during long-term cold storage of fruit, especially when fungicides are present.

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Isolation and Identification of Postharvest Rot Pathogens in Citrus × tangelo and Their Potential Inhibition with Acidic Electrolyzed Water

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Tangelo fruits suffer from fungal rot during storage caused primarily by two fungi: Penicillium citrinum and Aspergillus sydowii. Researchers tested acidic electrolyzed water (AEW), a safe and environmentally friendly treatment, and found it effectively kills these fungi by damaging their cell membranes and causing them to leak their contents. This treatment could replace harmful chemical fungicides while keeping tangelo fruits fresh and safe for consumers.

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Exogenous L-Arginine Enhances Pathogenicity of Alternaria alternata on Kiwifruit by Regulating Metabolisms of Nitric Oxide, Polyamines, Reactive Oxygen Species (ROS), and Cell Wall Modification

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Researchers discovered that a specific nutrient called L-arginine paradoxically makes a fungus that causes black spot on kiwifruit more dangerous at low concentrations. The fungus uses this amino acid to trigger multiple survival mechanisms including producing protective molecules and enzymes that break down plant cell walls. However, at higher concentrations, L-arginine actually inhibits the fungus, suggesting it could be used as part of a disease control strategy.

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Characterization and Biological Characteristics of Alternaria, Botryosphaeria, Pestalotiopsis, and Trichothecium Species Associated with Postharvest Loquat Fruit Rot in Yunnan, China

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Researchers in China identified four types of fungal pathogens responsible for loquat fruit rot after harvest. These fungi cause different symptoms ranging from ring-shaped spots to soft decay, with infection rates between 4-12%. The study confirmed each pathogen’s ability to cause disease and found that some are more aggressive than others. This research helps growers understand what causes loquat spoilage and suggests that careful handling and cool storage can reduce losses.

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Sweet Pepper cv. Lai Lai Ripeness Stage Influences Susceptibility to Mycotoxinogenic Alternaria alternata Causing Black Mold

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This research shows that green and red peppers can both develop black mold caused by a fungus called Alternaria alternata, but at different rates depending on temperature. Red peppers are more susceptible to severe infection at room temperature, while both types are similarly affected during cold storage. Importantly, infected peppers can produce toxins harmful to human health, emphasizing the need for preventing fungal infection in pepper crops before harvest and storage.

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