BioControl (2011) 56, 237-247

Nuray Özer (2011)
Screening for fungal antagonists to control black mold disease and to induce the accumulation of antifungal compounds in onion after seed treatment
BioControl 56 (2), 237-247
Abstract: Twelve isolates belonging to the genera Aspergillus, Penicillium, and Trichoderma, from onion (Allium cepa L.)-growing soils were recently found to have antagonistic features against Aspergillus niger (An) van Tieghem, the cause of black mold disease of onion, in dual culture. In the work reported in this paper, the function of these isolates applied as seed treatment on onion seed germination was investigated. In addition, isolates with no negative effect on seeds were screened for their effect on shoot length, and for their abilities to inhibit colonization of An on seeds, to control black mold disease, to increase set bulb diameter, and to induce production of antifungal compounds in pot-grown onion sets. Application of non-aflatoxigenic A. flavus Link (AS3), T. harzianum Rifai (TRIC7) and (TRIC8) to seeds led to defense reactions with accumulation of antifungal compounds in sets, combined with increased protection against the disease, although they did not enhance bulb diameter.
(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): Nuray Özer

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aspergillus niger	Onion/garlic/leek (Allium)
Trichoderma harzianum (antagonist)	Aspergillus niger	Onion/garlic/leek (Allium)
Aspergillus flavus - atoxigenic (antagonist)	Aspergillus niger	Onion/garlic/leek (Allium)