Cultivars Ripening stages Extracts Diameter of inhibition zone (mm)
E . coli ATCC 25922 Pseudomonas aeruginosaATCC 27853 Salmonellaenterica ATCC 13076 Listeria monocytogenesATCC 7644 Staph. saprophyticusATCC 15305 Staph. aureus ATCC 25923 Staph. aureusATCC 29213
Khulase Biser Ether ND 10.5 ± 1.0cd ND 12 ± 0.5gh 13.5 ± 0.0g 17.5 ± 0.5c 16.5 ± 0.0c
    Ethanol ND 9 ± 0.5d ND 20 ± 1.0c 35 ± 0.1b 15 ± 0.5d 15 ± 1.0d
    Water ND ND ND 16.5 ± 0.0de 14 ± 0.5f ND ND
  Rutab Ether ND ND ND 13 ± 0.5f 9.5 ± 1.0 8.5 ± 1.0g 11 ± 0.5fg
    Ethanol ND ND ND 13 ± 0.0f 31 ± 0.0c ND ND
    Water ND 8.5 ± 0.5d ND 15 ± 0.5e 10 ± 0.5h 9 ± 0.5fg 12 ± 0.0ef
  Tamer Ether ND 11 ± 0.5c ND 12.5 ± 0.5fg 10 ± 0.5h ND 12 ± 0.5ef
    Ethanol ND ND ND 14.75 ± 1.0ef 29 ± 0.5d ND ND
    Water ND 10.25cd ND 12.5 ± 0.0fg 29.5 ± 0.5cd ND 10 ± 0.5gh
Sheshi Biser Ether ND 9 ± 1.0d ND 17.5 ± 0.0d 17 ± 0.0e 12.5 ± 1.0e 11.5 ± 0.5fg
    Ethanol ND 10 ± 0.5cd ND 16 ± 1.0de 30 ± 0.5cd 12.5 ± 0.5e 16.5 ± 0.5c
    Water ND 9 ± 0.0d ND 15.5 ± 1.5e 29 ± 1.0d 9.5 ± 0.5fg 10.5 ± 0.0gh
  Rutab Ether ND ND ND 12 ± 0.0gh ND 9 ± 0.0fg 10 ± 0.0gh
    Ethanol ND ND ND 12 ± 0.0gh 31 ± 0.5c ND 9 ± 0.0h
    Water ND ND ND 15 ± 0.5e 9 ± 0.0h ND 11 ± 0.0fg
  Tamer Ether ND 13.5 ± 1.5b ND 9.5 ± 0.0h ND ND 9 ± 0.0h
    Ethanol ND ND ND 12.5 ± 1.0fg 35.5 ± 1.0b ND 8 ± 0.0h
    Water ND ND 9 ± 0.0d 12.5 ± 0.5fg 29.5 ± 0.5cd ND 8.5 ± 0.0h
Rezaz Biser Ether ND ND ND 15.5 ± 0.5e ND 10 ± 0.0f 10.5 ± 1.0gh
    Ethanol ND ND ND 15.5 ± 1.5e 37.5 ± 0.5a ND 10.5 ± 1.0gh
    Water ND ND ND 14.5 ± 1.0ef 30 ± 0.5cd ND 8.5 ± 0.5h
  Rutab Ether 11 ± 1.0c ND ND 12 ± 0.0gh ND ND 8.5 ± 0.5h
    Ethanol ND ND 12 ± 0.0c 13 ± 0.5f ND ND ND
    Water ND ND 11 ± 1.0c 15.5 ± 0.5e ND ND ND
  Tamer Ether ND ND ND 12 ± 0.5gh 12.5 ± 0.0g ND 13 ± 0.5e
    Ethanol ND ND ND 12.5 ± 0.0fg ND ND 8.5 ± 0.5h
    Water ND ND ND 11 ± 0.0h ND 13 ± 0.0e ND
    Chl 44 ± 1a 33 ± 1.0a 48 ± 0.0a 60 ± 0.0a ND 46 ± 0.0a 46 ± 1.0a
    Sul 30 ± 1b ND 26 ± 0.0b 30 ± 0.0b 38 ± 0.0a 32 ± 0.0b 33 ± 1.0b
a-hMean values (± SD; n = 6) within the same column bearing different superscripts are significantly different (P>0.05)
Chl: chloramphenicol, 25 mg/ml
Sul:sulfadimidin, 100 mg/ml
ND: Not Detected
Table 3: Antibacterial activity (Diameter of inhibition zone mm) of date cultivars extracts at various ripening stages against pathogenic bacteria.