Table 2 also shows that disease intensity decreased with the decrease in inoculum
concentration. It is well known that every spore of a pathogen has potentiality to produce disease.
Disease intensity cannot differ greatly with the decrease of inoculum potential on such a small
population. There might be present something else in the spore suspension responsible for
decreasing disease intensity when the concentration of the suspension was decreased. It is also
well known that F. moniliforme produces growth promoters named gibberellins (GAs). Presence
of GAs in the suspension may have an important role in overgrowth of the seedlings. When spore
suspension was diluted into different levels, GAs of the suspensions also diluted. As a result, OGR,
lankiness and colour were decreased with the decrease of inoculum concentration in this
experiment. Therefore, sterilized suspension filtrate of F. moniliforme might mimic bakanae
symptom.