Holy Basil ( Ocimum sanctum) , is a short lived perennial plant belonging to family Lamiaceae. Its leaves are medicinally important and used as a fresh or dried herb.

A diseased leaf was spotted on the Tulsi plant growing in my terrace. I plucked the leaf and saw its tips had turned necrotic. On magnifying I could see certain hypertrophied areas.

Browning on tips and edges as well as hypertrophied areas

I prepared temporary mount of the diseased part and observed under the foldscpe to find rounded dark round localised patches. Are these cysts or simple localized necrotic lesions?

I am unable to identify the causal organism.

Jasveen, GGDSD College, Chandigarh

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