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杉木缩顶病病原菌主要是Pestalotiopsis guepinii (Desm.) Stey. ,其次是Fusarium oxysporum Schlech。这两种菌菌丝生长的最适温度和pH值的范围是28～30℃和pH6～7。它们的分生孢子萌发与菌丝生长所需的最适温度相似。P.guepinii和F.oxysporum孢子萌发的相对湿度在95％以上是必需的。两者都以天冬酰胺作氮源生长最好且优于PSA;P.guepinii以麦芽糖为碳源生长最好但不及PSA,F.oxysporum在可溶性淀粉和甘露醇为碳源的培养基上生长优于PSA;杉木针叶及树皮汁培养基均不及PSA。两者在上述培养基上菌落颜色有很大的变化。
The main pathogens of CSP are Pestalotiopsis guepinii (Desm.) Stey., Followed by Fusarium oxysporum Schlech. The optimal temperature and pH for the growth of both mycelia are 28-30 ° C and pH 6-7. Their conidial germination is similar to the optimum temperature for mycelial growth. P.guepinii and F. oxysporum spores germination relative humidity above 95% is required. Both asparagine nitrogen source for the best and better than the PSA; P.guepinii malt sugar as the carbon source growth but the best but not PSA, F. oxysporum soluble starch and mannitol in the carbon source medium growth Better than PSA; fir needle and bark juice medium and PSA are less. Both of these colonies in the above medium have a great color change.