This study was carried out in the cold storage unit , Horticultural Department and the Plant Protection Department laboratories, College of Agriculture , University of Baghdad , Abu-Ghraib , during the seasons 2004and 2005. The results showed that isolation of the genera Alternaria , Aspergillus , Penicillium , cylindrocarpon , Rhizopus , Sclerotinia from green bean pods stored under temperatures of 12 – 18 , 8 , 4oC. Netted bags decreased frequency rate of Alternaria sp in sterilized and non sterilized pods under the three temperature (12-18 , 8 , 4)o C. the above mentioned treatment displayed the lower frequency rate of Aspergillus sp for sterilized and non sterilized pods under (12-18) o C and non sterilized pods under 4 o C on the other hand , under 8 oC temperature no infection was occurred for non sterilized pods treatments .The genus Penicillium sp was not found in sterilized pods kept either in polyethylene bags with 32 holes or netted bags and storied under 12-18oC . It also was not found in the netted bags for sterilized fruits under 4oC .The genus Cylindrocarpon sp did not found in sterilized and non sterilized pods kept in polyethylene or netted bags and stored at room temperature (12 – 18)oC , while the lower frequency rate of this genus was found in non sterilized pods kept in netted bags stored in 8o and 4o C. the paper bags less frequency rate was recorded for Alternaria sp after 13 days from the storage date . The treatment of fine cotton bags had the lowest frequency rate of both Aspergillus sp and Cylindrocarpon sp after 13 days from the storage date. Penicillium sp did not appear in pods kept in stiroform boxes , while the genus Sclerotinia sp did not appear in pods kept in both paper bags and cottony bags under 4 + 1o C. Sterilized pods kept in netted bags showed lower percent of microbial decay of (10.0 , 15.0 and 6.6%) after (6 , 15 , 21) days at (12 – 18 , 8 and 4 o C ) respectively . The pods in striform boxes had the lowest percent of microbial decay which was 11.5% after 11 days from storage date. In the treatment of stiroform boxes no pelling off was found in the fruits as this treatment was characterized by maintaining the highest value of chlorophyll pigments (a , b , total) in the fruits which was 0.0047 , 0.0021 , 0.0068 respectively after 13 days from storage date .
part of M.Sc. thesis of First Author |