Figure 6. Economics of roguing.
(a) Responses of the total yield, 
, and the total number of visits to individual plants, 
, (shown in inset) both over the twenty year nominal lifetime of the grove, to the roguing interval, 
. The initial level of infection 
was 4%. (b) The profit, 
, as a function of 
, when the relative cost of surveying, 
, is fixed at 
, again for 
. The distribution of profit when there is no roguing is shown in the histogram in the inset. (c) Responses of 
to 
for different values of 
. The black dots denote the roguing interval for which maximum profitability was attained. In all cases 
. (d) The maximum 
, and the value of 
at which this maximum profit was attained (inset), for a range of values of 
and for different values of 
.