Summary
“Purple Blotch” disease, which has recently been observed in Punjab, is caused byAlternaria porri (Ell.) Neergaard. It causes heavy damage to onion crop. Both the leaves and seed stalks are attacked. The symptoms of the disease under Punjab conditions have been described.
Pathogenicity to onion leaves, seed stalks and bulbs has been established. It has also been proved that fungus causing “Purple Blotch” of onion is a wound parasite and has got very limited host range.
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Communicated by Dr. L. D. Kapoor,f.a.sc.
A part of thesis submitted to the Panjab University (1958) in partial fulfilment for the degree of Master of Science in Agriculture (Plant Pathology).
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Pandotra, V.R. Purple blotch disease of onion in Punjab. Proc. Indian Acad. Sci. 60, 336–340 (1964). https://doi.org/10.1007/BF03053890
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DOI: https://doi.org/10.1007/BF03053890