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<p>Auricularia cornea is an economically important edible mushroom widely cultivated for its nutritional and medicinal value. During cultivation trials conducted at the Mushroom Research Laboratory, IGKV, Raipur (2022–2024), an unusual yellow, vein-like growth was observed colonizing the substrate and fruiting bodies. Morphological examination identified the contaminant as a slime mould (Physarum sp.), characterized by actively streaming plasmodia, yellow pigmentation with staining upon contact, a sulphur-like odor, and the formation of globose sporangia bearing brown spores on erect sporangiophores. Under conditions of 25–28 °C and 80–85% relative humidity, the organism rapidly developed extensive plasmodial networks, overgrew the substrate, and inhibited mycelial growth of A. cornea. Infected basidiocarps were stunted, discolored, and deformed, with yield losses reaching 60–70% in severely affected units. To our knowledge, this is the first report of Physarum sp. as a contaminant affecting A. cornea cultivation in India. The findings highlight an emerging biotic constraint in mushroom production and emphasize the need for strict sanitation, environmental regulation, and early detection to minimize crop losses. Further studies on molecular identification and management strategies are warranted.</p>

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Yellow slime mould (Physarum sp.) associated with poor quality basidiocarps in Auricularia cornea

  • 期刊论文

  • 发表日期：

    2026年6月3日

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  • Harvinder Kumar Singh,
  • Pradeep Kumar Badhai,
  • Devendra Kumar Choudhary,
  • Shweta Singh,
  • Chandramani Raj

摘要

Auricularia cornea is an economically important edible mushroom widely cultivated for its nutritional and medicinal value. During cultivation trials conducted at the Mushroom Research Laboratory, IGKV, Raipur (2022–2024), an unusual yellow, vein-like growth was observed colonizing the substrate and fruiting bodies. Morphological examination identified the contaminant as a slime mould (Physarum sp.), characterized by actively streaming plasmodia, yellow pigmentation with staining upon contact, a sulphur-like odor, and the formation of globose sporangia bearing brown spores on erect sporangiophores. Under conditions of 25–28 °C and 80–85% relative humidity, the organism rapidly developed extensive plasmodial networks, overgrew the substrate, and inhibited mycelial growth of A. cornea. Infected basidiocarps were stunted, discolored, and deformed, with yield losses reaching 60–70% in severely affected units. To our knowledge, this is the first report of Physarum sp. as a contaminant affecting A. cornea cultivation in India. The findings highlight an emerging biotic constraint in mushroom production and emphasize the need for strict sanitation, environmental regulation, and early detection to minimize crop losses. Further studies on molecular identification and management strategies are warranted.