Table 1 Disease progression represented as percentage live stem in 6 month old P. patula seedlings during an eight week period post inoculation with F. circinatum. The significance levels are relative to the relevant control.

Chitosan (1mg/ml)

89.73

82.31

76.75

71.43

60.81

61.16

36.10

Chitosan (10mg/ml)

91.12*

84.89*

80.60*

72.80*

64.28*

60.32

44.18

Control

89.23

82.10

74.48

69.04

58.65

55.15

34.53