Diseases and associated fungal pathogens of mulberry nurseries

and H.V. RAJU, V.P. GUPTA, GOVINDAIAH

Diseases and associated fungal pathogens of mulberry nurseries

2002

and H.V. RAJU, V.P. GUPTA, GOVINDAIAH

Various diseases, e.g. stem-canker, cutting rot, collar rot, sprout/leaf blight, die-back and root rot, were observed in mulberry (Morus alba) nurseries in Karnataka and Andhra Pradesh, India. These diseases affected initial establishment of mulberry by causing mortality of stem-cuttings and death of saplings. On isolation and identification, Botryodiplodia theobromae, Fusarium solani, Phoma sorghina, F. pallidoroseum and Colletotrichum gloeosporioides [Glomerella cingulata] were identified as causal pathogens of these diseases. Amongst these, B. theobromae was found to be highly virulent causing 44.4% mortality of cuttings (cv. Kanva 2) when inoculated to the soil and caused 51.4 to 61.1% mortality when inoculated in combination with F. solani and/or P. sorghina. B. theobromae also infected the foliage of saplings (50-60% saplings killed), causing die-back disease.

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