In addition, the results of the
disease severity investigation showed that BQ9 pretreated
plants had significantly reduced disease severity when
compared to the viral control; accordingly, 30 days after
inoculation with TYLCV the biocontrol efficacy of BQ9
in controlling the viral disease caused by TYLCV reached
58.7%. After 45 days, the protection conferred by BQ9 was
weakened; however, it still provided significant disease
reduction (42%) (Figure 1b).