TY  - EJOU
AU  - M, Kiehr 
AU  - Delhey, R 

TI  - Freckles, a blemish of onion bulbs caused by <i>Sclerotium</i> sp.
T2  - Phyton-International Journal of Experimental Botany

PY  - 2011
VL  - 80
IS  - all
SN  - 1851-5657

AB  - Freckles is a new blemish of white-scaled onion bulbs in the Lower Rio Colorado Valley (Argentina) characterized by the formation of small sclerotia imbedded in the dry scale tissue. The causal agent has been isolated from scales and symptomless roots of onion and was identified as <i>Sclerotium</i> sp. Although in its host range and morphology it resembles <i>Sclerotium cepivorum</i>, it is quite different with respect to other cultural and pathological traits. In inoculation experiments, onion and garlic plants could be infected and the typical sclerotia were formed, but no rot, a symptom characteristic for <i>S. cepivorum</i>, nor any other tissue deterioration was observed. The inoculated fungus could be re-isolated fulfilling Koch´s postulates. Freckles is considered a minor imperfection of minimal, if any, economic importance.
KW  - <i>Sclerotium</i> sp.
KW  -  <i>Sclerotium cepivorum</i>
KW  -  Onion
KW  -  Argentina

DO  - 10.32604/phyton.2011.80.221