highly significantP < 0.001
Results from the RM analysis of cube root transformed new attacks/m 2 showed highly significant date effects ( F = 20.86; df = 12, 96; P < 0.001) but differences between treatment groups, averaged over dates, and the treatment by date interaction, were not significant ( F = 2.07; df = 2, 26.6; P = 0.146 and F = 1.03; df = 24, 128; P = 0.433, respectively).