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

TI  - Smudge and other diseases of onion caused by <i>Colletotrichum circinans</i>, in southern Argentina
T2  - Phyton-International Journal of Experimental Botany

PY  - 2012
VL  - 81
IS  - all
SN  - 1851-5657

AB  - While studying the etiology of onion diseases in southern Argentina, a coelomycetous fungus was found associated with diverse disease expressions. They included the typical smudge symptoms in white onion bulbs in local markets as well as field infections on yellow- and red-coloured cultivars, with severe infections on transplants in the seed-bed. The fungus was isolated and identified as <i>Colletotrichum circinans</i> on the basis of its morphological, morphometric, biological and pathological characteristics. Two isolates, obtained from white bulbs and from transplants, were inoculated on bulbs of white and yellow-coloured cultivars and produced the typical smudge symptoms on the outer scales. Koch´s postulates were fulfilled by re-isolating the inoculated fungus. This is the first record of <i>C. circinans</i> in southern Argentina and the first observation of the disease in the field in this country.
KW  - <i>Colletotrichum circinans</i>
KW  -  Onion
KW  -  Smudge
KW  -  Southern Argentina

DO  - 10.32604/phyton.2012.81.161