Comparison of application of root endophytic <i>Trichoderma</i> into established kiwifruit orchards


  • C.H. Stark
  • R.A. Hill
  • N. Cummings
  • J-H. Li



The kiwifruit disease Pseudomonas syringae pv actinidiae (Psa) was first identified in New Zealand in 2010 and currently affects over 85 of the countrys kiwifruit orchard area This research focused on root endophytic Trichoderma as a biological control option for Psa as these fungi can limit the damaging effects of pathogens through antibiotic metabolites induce systemic resistance and improve plant health Promising biocontrol isolates were identified by inoculating kiwifruit with Trichoderma under controlled conditions and in the field before exposing them to Psa The mixture TriMix1 emerged as one of the best performing treatments consistently lowering disease incidence and increasing kiwifruit seedling longevity To assess persistence in kiwifruit roots and determine the best method to apply TriMix1 into existing orchards endophytic fungi were reisolated from kiwifruit roots at two organic NZ kiwifruit orchards following four treatments Trichoderma root application with (N) and without nutrient solution (T); surface application with vermicompost (V); untreated control (C) While similar numbers of Trichoderma were isolated from the two sites treatment effects were significant and treatments T V and N increased Trichoderma counts compared to the untreated control Inoculation of older orchard vines using a suitable application method facilitates the establishment of a strong root endophytic Trichoderma community that can improve plant health




How to Cite

Stark, C.H., R.A. Hill, N. Cummings, and J-H. Li. “Comparison of Application of Root Endophytic &lt;i&gt;Trichoderma&lt;/i&gt; Into Established Kiwifruit Orchards”. New Zealand Plant Protection 68 (January 8, 2015): 443–443. Accessed December 7, 2022.



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