a Tind of pots (NB ¼ no bag, B ¼ enclosed in a hermetic bag).
b Incidence of infection expressed as percentage measured 40 days after transplanting
using the DAS-ELISA technique (LS: Least Significance Difference).
c Four repetitions for each treatment and dose.
d Values in each column followed by the same letter do not differ significantly
according to the LSD method.