[Effects of three fungicides on arbuscular mycorrhizal fungal infection and growth of Scutellaria baicalensis Georgi].

To make full use of arbuscular mycorrhizal (AM) fungal resources to increase the quantity and quality of Chinese medicinal materials and reduce the use of fungicide and environmental pollution, this research was carried out under pot culture condition to study the effects of benomyl, difenconazole and flusilazol on AM fungal (Glomus mosseae) colonization and the growth of Scutellaria baicalensis. The results showed that Glomus mosseae generally promoted the growth of host plant under the same fungicide application, and the effect of Glomus mosseae was different with different fungicides. The growth of non-mycorrhizal Scutellaria baicalensis was inhibited by applying with different fungicides. On mycorrhizal plants, contents of K in shoot and Fe in root significantly decreased under benomyl treatment; the contents of total N, K in shoot, Baicalin and Ca in root significantly decreased under difenconazole treatment; mycorrhizal colonization, the contents of total P, Baicalin, K and Cu in shoot, total N, Ca, Zn and Fe in root significantly decreased under flusilazol. The inhibitory effects of flusilazol on the Glomus mosseae colonization and growth of Scustellaria baicalensis were greater than those of difenconazole and benomyl. It is reasonable to choose less toxic fungicides in Scutellaria baicalensis cultivation to reduce the harmful effects on arbuscular mycorrhizal fungi.