{"id":654,"date":"2026-08-26T00:00:00","date_gmt":"2026-08-25T16:00:00","guid":{"rendered":"https:\/\/www.xinhaimushroom.com\/?p=654"},"modified":"2026-10-09T12:20:21","modified_gmt":"2026-10-09T04:20:21","slug":"mycelium-de-shiitake-en-phase-de-colonisation-6-problemes-courants-causes-et-mesures-correctives","status":"publish","type":"post","link":"https:\/\/www.xinhaimushroom.com\/fr\/shiitake-mushroom-spawn-run-6-common-problems-causes-and-treatment-measures\/","title":{"rendered":"Guide de course du blanc de shiitak\u00e9"},"content":{"rendered":"
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La r\u00e9ussite de la culture du shiitak\u00e9 (Lentinula edodes) d\u00e9pend largement d'une course de blanc saine \u2014 la phase de croissance myc\u00e9lienne pr\u00e9c\u00e9dant la fructification. De nombreux cultivateurs perdent du rendement \u00e0 cause de probl\u00e8mes qui apparaissent durant cette p\u00e9riode. Ce guide pratique couvre les 6 probl\u00e8mes de course de blanc les plus courants, leurs causes et les mesures de traitement \u00e9prouv\u00e9es pour vous aider \u00e0 prot\u00e9ger vos grumes et augmenter votre production de champignons. <\/span><\/div>\n\n\n\n
\n

1. R\u00e9gression du myc\u00e9lium dans les sacs de blanc<\/strong><\/span><\/p>\n

Sympt\u00f4mes :<\/strong> Pendant la phase de course de blanc, le myc\u00e9lium blanc jaunit, et les zones autrefois colonis\u00e9es par le myc\u00e9lium reviennent \u00e0 la couleur naturelle du substrat de sciure.<\/span><\/p>\n

Causes :<\/strong> La temp\u00e9rature pendant la course de blanc d\u00e9passe 35 \u00b0C, et les sacs ne sont pas retourn\u00e9s assez fr\u00e9quemment.<\/span><\/p>\n

Pr\u00e9vention et traitement :<\/strong><\/span><\/p>\n

    \n
  • \u00c9vitez de confectionner des sacs pour la culture pendant les saisons chaudes.<\/span><\/li>\n
  • Pour les grumes n\u00e9cessitant une longue course de blanc, percez des trous d'a\u00e9ration pour augmenter l'apport en oxyg\u00e8ne.<\/span><\/li>\n<\/ul>\n
    \n

    2. Brunissement faible ou absent des grumes de champignons<\/strong><\/span><\/p>\n

    Sympt\u00f4mes :<\/strong> Les grumes pr\u00e9sentent une couleur jaune-brun clair (formation insuffisante de l'\u00e9corce protectrice brun fonc\u00e9).<\/span><\/p>\n

    Causes :<\/strong><\/span><\/p>\n

      \n
    • \u00c2ge myc\u00e9lien insuffisant \u2014 les grumes sont d\u00e9ball\u00e9es trop t\u00f4t, avant que le myc\u00e9lium ne soit physiologiquement mature.<\/span><\/li>\n
    • Mauvaise r\u00e9tention d'humidit\u00e9 sur la couche de culture \u2014 humidit\u00e9 trop faible pour r\u00e9pondre aux exigences du brunissement.<\/span><\/li>\n
    • Temp\u00e9rature trop \u00e9lev\u00e9e au d\u00e9ballage avec pulv\u00e9risation d'eau commenc\u00e9e trop tard, ou temp\u00e9rature inf\u00e9rieure \u00e0 12 \u00b0C au d\u00e9ballage.<\/span><\/li>\n<\/ul>\n

      Traitement :<\/strong><\/span><\/p>\n

        \n
      • Pulv\u00e9riser de l'eau pour la r\u00e9tention d'humidit\u00e9 combin\u00e9e \u00e0 une ventilation \u2014 une fois par jour pendant 2 \u00e0 3 jours cons\u00e9cutifs.<\/span><\/li>\n
      • Inspecter le film de couverture de la couche, r\u00e9parer les trous \u00e9ventuels et tendre le film pour am\u00e9liorer la r\u00e9tention d'humidit\u00e9.<\/span><\/li>\n
      • Poser les grumes \u00e0 plat sur le sol pour utiliser la temp\u00e9rature et l'humidit\u00e9 du sol afin de favoriser le brunissement d'un c\u00f4t\u00e9, puis les retourner pour brunir l'autre c\u00f4t\u00e9.<\/span><\/li>\n
      • Si caus\u00e9 par une temp\u00e9rature basse : retirer une partie de l'ombrage pour laisser entrer la lumi\u00e8re et \u00e9lever la temp\u00e9rature, et ventiler \u00e0 midi.<\/span><\/li>\n
      • Si caus\u00e9 par une temp\u00e9rature \u00e9lev\u00e9e : augmenter la fr\u00e9quence de ventilation et pulv\u00e9riser de l'eau de source fra\u00eeche pour abaisser la temp\u00e9rature ; ouvrir le film aux deux extr\u00e9mit\u00e9s de la couche \u00e0 midi, et ventiler le matin et le soir pendant 30 minutes \u00e0 chaque fois.<\/span><\/li>\n<\/ul>\n
        \n

        3. D\u00e9shydratation myc\u00e9lienne<\/strong><\/span><\/p>\n

        Sympt\u00f4mes :<\/strong> La surface de la grume devient rugueuse et piquante au toucher, et le poids diminue sensiblement.<\/span><\/p>\n

        Causes :<\/strong><\/span><\/p>\n

          \n
        • Forte exposition au soleil pendant la course de blanc, ou chute du ruban adh\u00e9sif sur les trous d'inoculation, provoquant l'\u00e9vaporation de l'eau du sac.<\/span><\/li>\n
        • Vent sec du nord-ouest ou vent chaud et sec au d\u00e9ballage, provoquant la rupture des cellules myc\u00e9liennes, la fuite des nutriments et le dess\u00e8chement de la surface.<\/span><\/li>\n
        • Grande diff\u00e9rence d'humidit\u00e9 entre le site de culture et le myc\u00e9lium \u2014 courant dans les fermes de champignons en terrain sec o\u00f9 le sol absorbe l'humidit\u00e9 des grumes.<\/span><\/li>\n
        • Mauvaise r\u00e9tention d'humidit\u00e9 du film de couche (vieux film trou\u00e9, film mal tendu ou flux d'air excessif dans la couche).<\/span><\/li>\n
        • Ventilation inappropri\u00e9e \u2014 le film est laiss\u00e9 ouvert trop longtemps et les grumes sont expos\u00e9es au vent chaud et sec.<\/span><\/li>\n<\/ul>\n

          Traitement :<\/strong><\/span><\/p>\n

            \n
          • Augmenter la pulv\u00e9risation d'eau \u2014 utiliser un arrosoir pour pulv\u00e9riser abondamment de l'eau sur les grumes pendant 2 jours cons\u00e9cutifs jusqu'\u00e0 ce que la surface soit souple plut\u00f4t que piquante.<\/span><\/li>\n
          • Couvrir le film herm\u00e9tiquement et raccourcir le temps de ventilation, en maintenant une humidit\u00e9 relative d'environ 90 %.<\/span><\/li>\n
          • Irriguer les sillons des deux c\u00f4t\u00e9s de la couche de champignons avec de l'eau courante pour augmenter l'humidit\u00e9 du sol.<\/span><\/li>\n<\/ul>\n
            \n

            4. \u00c9paississement de la couche d'\u00e9corce (cro\u00fbte)<\/strong><\/span><\/p>\n

            Sympt\u00f4mes :<\/strong> La couche d'\u00e9corce devient dure et brun fonc\u00e9, rendant la fructification difficile.<\/span><\/p>\n

            Causes :<\/strong><\/span><\/p>\n

              \n
            • D\u00e9ballage retard\u00e9 \u2014 l'\u00e2ge myc\u00e9lien est trop long, les nutriments sont continuellement transport\u00e9s vers la surface, et le myc\u00e9lium se noue et s'\u00e9paissit couche par couche.<\/span><\/li>\n
            • Formule de substrat inappropri\u00e9e \u2014 source d'azote excessive, rapport carbone\/azote d\u00e9s\u00e9quilibr\u00e9, prolif\u00e9ration excessive du myc\u00e9lium, effondrement retard\u00e9 et \u00e9corce \u00e9paissie apr\u00e8s le brunissement.<\/span><\/li>\n
            • Ventilation inappropri\u00e9e \u2014 non-respect du calendrier de ventilation de la phase de brunissement, ou sessions de ventilation trop peu nombreuses et trop courtes.<\/span><\/li>\n
            • Site de culture trop ombrag\u00e9 avec un \u00e9clairage insuffisant.<\/span><\/li>\n<\/ul>\n

              Traitement :<\/strong><\/span><\/p>\n

                \n
              • Renforcer la ventilation \u2014 au moins 2 fois par jour, 1 heure \u00e0 chaque fois.<\/span><\/li>\n
              • Ajuster l'\u00e9clairage \u2014 maintenir un environnement \u201c trois parties de soleil, sept parties d'ombre \u201d.<\/span><\/li>\n
              • Augmenter la diff\u00e9rence sec-humide et la diff\u00e9rence de temp\u00e9rature pour forcer le myc\u00e9lium \u00e0 passer de la croissance v\u00e9g\u00e9tative \u00e0 la croissance reproductive.<\/span><\/li>\n
              • Utiliser la \u201c m\u00e9thode de fructification par tapotement des grumes \u201d \u2014 brosser la surface de la grume dans les deux sens avec une brosse \u00e0 paume tremp\u00e9e dans l'eau, ou presser d\u00e9licatement la grume \u00e0 la main pour faire vibrer et briser le myc\u00e9lium, exposant le myc\u00e9lium blanc \u00e0 travers les fissures pour favoriser la nouaison et la fructification.<\/span><\/li>\n<\/ul>\n
                \n

                5. S\u00e9cr\u00e9tion d'eau jaune par les sacs<\/strong><\/span><\/p>\n

                Sympt\u00f4mes :<\/strong> \u00c0 mesure que les sacs m\u00fbrissent progressivement, des gouttelettes d'eau jaune-brun (commun\u00e9ment appel\u00e9es \u201c eau jaune \u201d) ne cessent de suinter de la surface du sac. L'eau jaune contient des nutriments ; si elle s'accumule excessivement avec le temps, elle peut facilement attirer le Trichoderma et d'autres contaminants, finissant par faire pourrir les sacs. Elle doit \u00eatre trait\u00e9e rapidement.<\/span><\/p>\n

                Traitement :<\/strong><\/span><\/p>\n

                  \n
                • Renforcer la ventilation pour emp\u00eacher les bact\u00e9ries de se multiplier dans un environnement carenc\u00e9 en oxyg\u00e8ne ; la ventilation aide \u00e9galement \u00e0 \u00e9vaporer l'eau jaune.<\/span><\/li>\n
                • Utiliser un couteau ou une aiguille tranchante et st\u00e9rilis\u00e9e pour percer le sac aux points d'accumulation d'eau jaune (percer uniquement le film plastique, pas le myc\u00e9lium) afin de laisser l'eau jaune s'\u00e9couler. \u00c9viter de laisser l'eau jaune p\u00e9n\u00e9trer dans les trous d'inoculation. Lors de la pulv\u00e9risation d'eau pour refroidir les sacs, rincer l'eau jaune, mais \u00e9viter de laisser l'eau p\u00e9n\u00e9trer \u00e0 l'int\u00e9rieur du sac.<\/span><\/li>\n<\/ul>\n
                  \n

                  6. Moisissure et pourriture des grumes de champignons<\/strong><\/span><\/p>\n

                  Sympt\u00f4mes :<\/strong> Pendant le d\u00e9ballage et le brunissement, des taches noires apparaissent sur les grumes ; en pressant la zone affect\u00e9e, de l'eau noire suinte, avec une odeur f\u00e9tide.<\/span><\/p>\n

                  Causes :<\/strong><\/span><\/p>\n

                    \n
                  • Temp\u00e9rature \u00e9lev\u00e9e apr\u00e8s le d\u00e9ballage, surtout les jours de pluie avec une mauvaise ventilation \u2014 temp\u00e9rature et humidit\u00e9 \u00e9lev\u00e9es favorisent la contamination.<\/span><\/li>\n
                  • Moisissure non d\u00e9tect\u00e9e \u00e0 temps pendant la course de blanc, restant latente dans le substrat et se multipliant rapidement apr\u00e8s le d\u00e9ballage lorsque la temp\u00e9rature et l'humidit\u00e9 deviennent favorables.<\/span><\/li>\n
                  • D\u00e9ballage trop tardif \u2014 l'eau jaune p\u00e9n\u00e8tre dans la grume et provoque une contamination.<\/span><\/li>\n
                  • Site trop ombrag\u00e9, environnement environnant m\u00e9diocre et mauvaise circulation d'air.<\/span><\/li>\n<\/ul>\n

                    Traitement :<\/strong><\/span><\/p>\n

                      \n
                    • Isolate the affected logs \u2014 gather moldy logs on one bed and sprinkle lime powder on the ground.<\/span><\/li>\n
                    • Manual removal combined with chemicals \u2014 first cut away the rotten parts with a knife to expose healthy tissue (leave no rotten material behind), then wipe or apply 50% carbendazim diluted 200\u2013300 times onto the affected areas to effectively inhibit further rot.<\/span><\/li>\n
                    • Control water spraying to avoid excessive humidity.<\/span><\/li>\n
                    • Increase ventilation \u2014 open the film once a day to keep the bed air fresh.<\/span><\/li>\n
                    • If the shading around the shed is too dense, open the north\u2013south ventilation windows to allow air circulation.<\/span><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"

                      Shiitake mushroom (Lentinula edodes) cultivation success depends largely on a healthy spawn run \u2014 the mycelial growth stage before fruiting. Many growers lose yield because of problems that appear during this period. This practical guide covers the 6 most common spawn run problems, their causes, and proven treatment measures to help you protect your logs […]<\/p>\n","protected":false},"author":1,"featured_media":4631,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-654","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"\nShiitake Mushroom Spawn Run Guide - Xinhai Mushroom Equipment<\/title>\n<meta name=\"description\" content=\"Shiitake mushroom (Lentinula edodes) cultivation success depends largely on a healthy spawn run \u2014 the mycelial growth stage before fruiting. Many growers\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Shiitake Mushroom Spawn Run Guide\" \/>\n<meta property=\"og:description\" content=\"Shiitake mushroom (Lentinula edodes) cultivation success depends largely on a healthy spawn run \u2014 the mycelial growth stage before fruiting. Many growers\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.xinhaimushroom.com\/fr\/mycelium-de-shiitake-en-phase-de-colonisation-6-problemes-courants-causes-et-mesures-correctives\/\" \/>\n<meta property=\"og:site_name\" content=\"Xinhai Mushroom Equipment\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/xinhaimushroom\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-25T16:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-09T04:20:21+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.xinhaimushroom.com\/wp-content\/uploads\/2026\/09\/Shiitake-Mushroom-Spawn-Run-6-Common-Problems-Causes-and-Treatment-Measures-858562.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"760\" \/>\n\t<meta property=\"og:image:height\" content=\"964\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"@mxd1101201\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/shiitake-mushroom-spawn-run-6-common-problems-causes-and-treatment-measures\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/shiitake-mushroom-spawn-run-6-common-problems-causes-and-treatment-measures\\\/\"},\"author\":{\"name\":\"@mxd1101201\",\"@id\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/#\\\/schema\\\/person\\\/65e2f2e3e50adcbf00007578972fdf46\"},\"headline\":\"Shiitake Mushroom Spawn Run Guide\",\"datePublished\":\"2026-08-25T16:00:00+00:00\",\"dateModified\":\"2026-10-09T04:20:21+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/shiitake-mushroom-spawn-run-6-common-problems-causes-and-treatment-measures\\\/\"},\"wordCount\":998,\"publisher\":{\"@id\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/shiitake-mushroom-spawn-run-6-common-problems-causes-and-treatment-measures\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/Shiitake-Mushroom-Spawn-Run-Guide-1.jpg\",\"articleSection\":[\"\u672a\u5206\u7c7b\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/shiitake-mushroom-spawn-run-6-common-problems-causes-and-treatment-measures\\\/\",\"url\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/shiitake-mushroom-spawn-run-6-common-problems-causes-and-treatment-measures\\\/\",\"name\":\"Shiitake Mushroom Spawn Run Guide - Xinhai Mushroom Equipment\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/shiitake-mushroom-spawn-run-6-common-problems-causes-and-treatment-measures\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/shiitake-mushroom-spawn-run-6-common-problems-causes-and-treatment-measures\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.xinhaimushroom.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/Shiitake-Mushroom-Spawn-Run-Guide-1.jpg\",\"datePublished\":\"2026-08-25T16:00:00+00:00\",\"dateModified\":\"2026-10-09T04:20:21+00:00\",\"description\":\"Shiitake mushroom (Lentinula edodes) cultivation success depends largely on a healthy spawn run \u2014 the mycelial growth stage before fruiting. 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