price_reduction function

Price reduction function

Price reduction function

Give the price reduction rate associated with the infection on the (grapevine) fruits

price_reduction( I_host, N_host, Nhost, Nyears, nTSpY, severity_thresh = 0.075, price_penalty = 0.3 )

Arguments

  • I_host: number of infected individuals for each cultivar and timestep
  • N_host: total number of individuals for each cultivar and timestep
  • Nhost: total number of cultivars considered in the simulation
  • Nyears: number of simulated cropping seasons
  • nTSpY: number of timesteps (e.g. days) per cropping season
  • severity_thresh: disease severity threshold above which the price reduction is applied
  • price_penalty: percentage of price reduction

Returns

A matrix with the price reduction rate per cultivar and per year of simulation

References

Savary, S., Delbac, L., Rochas, A., Taisant, G., & Willocquet, L. (2009). Analysis of nonlinear relationships in dual epidemics, and its application to the management of grapevine downy and powdery mildews. Phytopathology, 99(8), 930-942.