Abstract:
【Objective】 To expand biocontrol strain resources and screen new strains with a higher antagonistic rate and a wider inhibiting range to control ginseng diseases.【Method】 The antagonistic strains were isolated by dilution plate method and were screened by flat-stand method.【Result and conclusion】 Seven actinomycetes strains with higher antagonistic activities to single ginseng pathogen, such as
Phytophthora cactorum,
Sclerotinia schinseng,
Botrytis cinerea,
Alternaria panax,
Cylindrocarpon destructans,
Rhizoctonia solani and
Fusarium solani, had been screened, whose inhibition rates were 80.84%, 82.46%, 66.08%, 71.33%, 64.63%, 85.53% and 65.11%, respectively. Five strains, including a strain of
Trichoderma and four strains of
Actinomyces, had higher antagonistic activities to seven kinds of ginseng pathogens. The results indicate that the beneficial strains in the rhizosphere has a biocontrol potential ability of ginseng pathogens and can be used to prevent and cure major diseases of ginseng.