Plant Pathology (2005) 54, 212-218

K.L. McLean, J. Swaminathan, C.M. Frampton, J.S. Hunt, H.J. Ridgway and A. Stewart (2005)
Effect of formulation on the rhizosphere competence and biocontrol ability of Trichoderma atroviride C52
Plant Pathology 54 (2), 212-218
Abstract: The rhizosphere competence of the biological control agent Trichoderma atroviride isolate C52 was studied on onion roots both in the glasshouse and in the field when introduced into soil in a range of formulations. Proliferation of T. atroviride in the rhizosphere was formulation-dependent. A pellet formulation maintained the fungal concentration at 10⁵ cfu per g soil, whereas solid-substrate and seed-coating formulations gave concentrations of 10⁴ and 10¹ cfu per g soil, respectively. To facilitate rhizosphere-competence studies, a UP-PCR band profile generated with primer L45 for isolate C52 was used to enable conclusive identification of T. atroviride C52 when recovered from soil. When isolate C52 was introduced into Sclerotium cepivorum-infested soil as both pellet and solid-substrate formulations, there was no statistically significant difference in the disease control between these treatments, but the pellet treatment doubled the percentage of healthy plants compared with the control treatment.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Alison Stewart, Hayley J. Ridgway, Kirstin L. McLean

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
formulation/storage of bioagents
application technology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Stromatinia cepivora	Onion/garlic/leek (Allium)
Trichoderma atroviride (antagonist)	Stromatinia cepivora	Onion/garlic/leek (Allium)