title: [Antagonism of Trichoderma spp. to fungi caused root rot of Sophora tonkinensis].
abstract: OBJECTIVE
  To study the antagonism of Trichoderma spp. to fungi S9(Fusarium solani)which caused root rot of Sophora tonkinensis and discuss the further develop prospects of microbial biological control in soil-borne diseases on Chinese herbal medicines.
  
  
  METHODS
  Antagonism of H2 (Trichoderma harsianum), M6 (Trichoderma viride) and K1 (Trichoderma koningii) to Fusarium solani were researched by growth rate and confront culture. And their mechanisms were discussed.
  
  
  RESULTS
  H2 and M6 had obvious competitive advantage, the growth rate of which were 1.43-2.72 times and 1.43-1.95 times as S9 respectively. The space competitive advantage of K1 was relatively weak; the growth rate was slower than S9. The antagonism of three species of Trichoderma spp. to S9 was in varying degrees. The antagonism to S9 of M6 and H2 was better,the inhibition rate were 100% and 82.35% respectively, even cultivated S9 for three days in advance. And their inhibition indexes were both reached class I. The inhibition index and inhibition rate of K1 was respectively 46.36% and class IV. The Trichoderma spp. could cause S9 mycelium to appear some phenomenon just like fracture, constriction reduced, digestion, etc. which were observed under the microscope.
  
  
  CONCLUSIONS
  Trichoderma harsianum and Trichoderma viride showed the further develop prospects in the fight against soil-borne disease on Chinese herbal medicines.
authors.affiliation: Guangxi Botanical Garden of Medicinal Plant, Nanning 530023, China. qinliuyan@126.com
authors.forename: Liu-yan
authors.initials: LY
authors.lastname: Qin
authors.forename: Ni
authors.initials: N
authors.lastname: Jiang
authors.forename: Mei-qiong
authors.initials: MQ
authors.lastname: Tang
authors.forename: Jian-hua
authors.initials: JH
authors.lastname: Miao
authors.forename: Lin-xuan
authors.initials: LX
authors.lastname: Li
mesh_terms: D000898:Antibiosis; D061046:Biological Control Agents; D007887:Fabaceae / Q000382:microbiology*; D005670:Fusarium / Q000254:growth & development* / Q000472:pathogenicity; D010935:Plant Diseases / Q000382:microbiology*; D018517:Plant Roots / Q000382:microbiology; D010946:Plants, Medicinal / Q000382:microbiology; D012988:Soil Microbiology; D014242:Trichoderma / Q000502:physiology*
chemical_list: D061046:Biological Control Agents