Biological Control of Pestilence - Dynamic Modeling of Diseases and Pests - page 190

INFLOWS:
Death Time CONVEYOR OUTFLOW

Infected Population(t)

=

= Infected Population(t − dt) + (Infection −

Death Time) * dt
INIT Infected Population = 1

TRANSIT TIME = 10000

INFLOW LIMIT = ∞

CAPACITY = ∞

INFLOWS:
Infection = IF (INT(Change in Damage > 0)) AND (Uninfected Fraser Fir > 0)

THEN (1) ELSE 0
OUTFLOWS:
Death Time = CONVEYOR OUTFLOW

Larva 1(t) = Larva 1(t − dt) + (Eggs to 1st − First to Second −

Larva 1 Death) * dt
INIT Larva 1 = 10000

INFLOWS:
Eggs to 1st = Eggs * (1/(24 * (5.0 + 100 * (EXP( − 0.10 * (Hourly Temp −

4))))))
OUTFLOWS:
First to Second

= IF Day Accumulation > = 226 AND Day Accumulation < = 80

THEN 0 ELSE Larva 1 * (1/(72 * (10.0 + 50 * (EXP( − 0.25 * (Hourly Temp

− 4))))))

Larva 1 Death = IF (Day Accumulation = 80) THEN Pesticide ELSE (Larva 1

*Rate1)
Larva 2(t) = Larva 2(t − dt) + (First to Second − Second to Third −

Larva 2 Death) * dt
INIT Larva 2

= 0

INFLOWS:
First to Second = IF Day Accumulation > = 226 AND Day Accumulation < = 80

THEN 0 ELSE Larva 1 * (1/(72 * (10.0 + 50 * (EXP( − 0.25 * (Hourly Temp

− 4))))))

OUTFLOWS:
Second to Third

= Larva 2*(1/(72*(10.0 + 50 * (EXP( − 0.25 *

(Hourly Temp − 4))))))

Larva 2 Death = Larva 2*Rate2 \ 3

Larva 3(t) = Larva 3(t − dt) + (Second to Third − Third to Adult −

Larva 3 Death) * dt
INIT Larva 3

= 0

INFLOWS:
Second to Third = Larva 2*(1/(72*(10.0 + 50 * (EXP( − 0.25 *

(Hourly Temp − 4))))))

OUTFLOWS: