tailieunhanh - First report of powdery mildew caused by Golovinomyces cichoracearum Dahlia (Dahlia variabilis) from Himachal Pradesh (India)

Powdery mildew disease appeared for the first time in field-grown Dahlia (Dahlia variabilis) in Himachal Pradesh, India. With the advancement of the disease, the infected plants withered and died. In order to investigate the causal organism of this symptom disease, fungus was morphologically studied. The fungus showed conidiophore with85-118 X 6-10µm in size, composed of subcylindrical foot cell with a single constriction at the base, and 2-4 immature conidia in chains formed in basipetal succession. Conidia that were hyaline, barrel-shaped or ellipsoid or doliform, borne in chains of three to four and without distinct fibrosin bodies measuring 29-52µm X 14-19µm. |

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