Table 5. Parameter values for model simulations.

Parameter	Definition	Value for Host 1 (Short-lived)	Value for Host 2 (Long-lived)
DS	Lifespan of S plants	42 days (d)	70 d
m = 1/DS	Mortality rate of S plants	0.0238 d−1	0.0143 d−1
DI	Lifespan of I plants	42 d	81 d
v	Virulence: (m+v) = 1/DI	0	−0.0019 d−1
bii	Probability of transmission to Si from Si	0.0967	0.0731
bji	Probability of transmission to Si from Sj	0.0872	0.0383
Φii	Rate at which a vector goes from an S to an I plant of the same host	Φ11 = Φ	Φ22 = Φ
Φji	Rate at which a vector goes from an S to an I plant of the other host	Φ21 = Φ	Φ12 = 0.63Φ
1/τ	Infectious period of vector	0.25 d−1	0.25 d−1
a	Prob. of aphids acquiring the virus b	0.0967	0.0731
Dx	Lifespan of aphids	40 d	40 d
α = 1/Dx	Mortality rate of aphids	0.025 d−1	0.025 d−1
K	maximum density of the plant population	model tested with 5≤K≤500 for both hosts
Q	maximum density of the insect vector population	model tested with 0.1≤Q≤5 for both hosts
Φ	rate at which a vector goes from a host to another	model tested with 0.01≤Φ≤1 for both hosts.