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Colonisation of grapevine wood by Trichoderma harzianum and Eutypa lata
Author(s) -
JOHN S.,
WICKS T.J.,
HUNT J.S.,
SCOTT E.S.
Publication year - 2008
Publication title -
australian journal of grape and wine research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.65
H-Index - 77
eISSN - 1755-0238
pISSN - 1322-7130
DOI - 10.1111/j.1755-0238.2008.00003.x
Subject(s) - trichoderma harzianum , inoculation , colonisation , biology , horticulture , biological pest control , botany , colonization , microbiology and biotechnology
Background and Aims: Trichoderma species have potential in biocontrol of eutypa dieback; however, little is known about their ability to colonise grapevine wood. The colonisation of vines by Trichoderma harzianum and its effects on colonisation by Eutypa lata were studied. Methods and Results: T. harzianum colonised canes over a total distance (above and below the inoculation point) of 10 cm or more in 12 weeks after inoculation. Application of T. harzianum to canes prior to E. lata , either at the same inoculation point or at a different point, reduced recovery of the pathogen. In the field, T. harzianum grew 3 cm from the inoculation point in 4 months in all seven of the mature vines treated. The fungus persisted for 20 months in four of the seven vines at 6 cm from the inoculation point and reached the crown of one vine. Prior inoculation of mature vines with Trichodowels, containing T. harzianum , reduced recovery of E. lata 14 months after inoculation. Conclusions: T. harzianum colonised wood of Chardonnay, Shiraz and Nyora and reduced colonisation by E. lata . T. harzianum persisted in wood of mature vines of Nyora for up to 20 months. Significance of the Study: The results support the potential of T. harzianum in the biocontrol of eutypa dieback.