บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of cooling and pre- and postharvest chemical treatments on Sclerotinia sclerotiorum in stored carrots (Daucus carota).

Boese, Dennis.

Thesis of M.Sc., The University of Manitoba, Canada, 1990, 95 pages

1990

บทคัดย่อ

EFFECT OF COOLING AND PRE- AND POSTHARVEST CHEMICAL TREATMENTS ON SCLEROTINIA SCLEROTIORUM IN STORED CARROTS (DAUCUS CAROTA).

The potential of field-applied fungicides and postharvest dips to reduce Sclerotinia sclerotiorum (Lib.) de Bary infection in stored carrots (Daucus carota L.) was investigated.

 Vinclozolin (3- (3,5-dichlorophenyl) -5-methyl-5-vinyl-1,3-oxazolidine-2,4-dione) applied at 0.84 l ai/ha to the foliage ten days before harvest resulted in almost complete prevention of disease development in storage.  Two applications of vinclozolin during the growing season, at a dosage of 0.42 l ai/ha each time, were also effective in reducing sclerotinia rot.  Benomyl (methyl 1- (butylcarbamoyl) -2-benzimidazole-carbamate) applied at 1.0 kg ai/ha ten days before harvest also reduced sclerotinia development in storage, but was less effective than vinclozolin.

 A benomyl dip before storage reduced S.  sclerotiorum development in storage.  H2O and CaCl2 dips were not effective in reducing sclerotinia disease in stored carrots.

 Cooling studies demonstrated the importance of rapid cooling after harvest to minimize losses in storage from sclerotinia disease.

 Temperature monitoring of three commercial carrot storages revealed that bulk stored carrots required up to 2 months to cool to storage temperatures of 0-1circC.  (Abstract shortened by UMI.).