A novel native bio-control agent Trichoderma Brevicompactum promotes growth and resistance to the powdery mildew in Impatiens Balsamina

摘要

Ornamental plants are very important to control environmental pollution and ultimately contribute in beautification of urban areas. Native Trichoderma brevicompactum Tb-50 isolated from rhizosphere soil of ornamental plant, Salvia splendens Ker-Gawler was identified via combination of morphological and molecular methods based on rDNA internal transcribed spacer region gene sequences. The antagonist action of Tb-50 against five soil-borne plant pathogens, Sclerotinia sclerotiorum , Fusarium oxysporum , Rhizoctonia solani , Alternaria alternate and Cytospora chrysosperma , was respectively investigated on dual culture in petri dishes. Moreover, the present study focuses to promote flower production, improvement of vegetative parts, diseases resistance and early blossoming flowers of Impatiens balsamina by the applications of Tb-50. The presented results showed positive effects on leaves, stem height, seeds setting and plant height when compared with control group (CK). Besides, it is also found that the applications of Tb-50 controlled powdery mildew on I. balsamina .