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Post-harvest pathogens on cold stored carrots: Mycocentrospora acerina (Deighton), the major spoilage fungus.

Cam, B. le; Rouxel, F.; Villeneuve, F.;

Agronomie Year: 1993 Vol: 13 Issue: 2 Pages: 125-133 Ref: 25 ref.

1993

บทคัดย่อ

Post-harvest pathogens on cold stored carrots: Mycocentrospora acerina (Deighton), the major spoilage fungus.

Analysis of carrot root mycoflora under cold storage and production conditions in Normandy, France, showed that major spoilage pathogens were M. acerina and Phytophthora megasperma. Rot caused by Botrytis cinerea, Sclerotinia sclerotiorum and Stemphylium radicinum [Alternaria radicina] was of secondary importance. Storage losses due to fungal spoilage were lower in ice-bank cooled stores at 0.5-1 deg C and RH 98% than in conventionally cooled stores at 2 deg , 85-90% RH. Only M. acerina and B. cinerea strains were pathogenic on carrot root slices at 0.5 deg , but were not particularly adapted for cold conditions. The behaviour of the pathogens related to temp. and RH is discussed. A relationship was found between healing of wounds on roots and infection by M. acerina by exposing them before cold storage. It is concluded that spoilage wastage caused by M. acerina still remains important even under opt. storage conditions.