Temporal Dynamics of Septoria Leaf Spot of Blueberry and its Relationship to Defoliation and Yield

Fig. 4. Relationship between Septoria leaf spot severity in the fall of 2001 and flower bud numbers (top) and yield (bottom) in 2002 on shoots of Premier rabbiteye blueberry in a field trial in Athens, Georgia. Disease severity is expressed as the number of spots per leaf prior to defoliation of that leaf and averaged for all leaves on a given shoot.



Image from Plant Health Progress article:
Temporal Dynamics of Septoria Leaf Spot of Blueberry and its Relationship to Defoliation and Yield