Figure 2.

GPNR-simulated dynamics of Meloidogyne incognita, Pochonia chlamydosporia, and roots. (A) Six-month population dynamics of M. incognita eggs (filled symbols) and parasitic fungus propagules and (B) roots (filled symbols) and nematode sedentary stages. Data were produced with initial P. chlamydosporia densities of 5 · 10³ propagules · cc soil^-1. GPNR validation with observed data (C): phases space plot of simulated propagule numbers (filled symbols) resulting from the model cycle, and of observed mean colony-forming units from soil and roots · cc^-1 vs. simulated and observed J2 · 100 cc soil^-1 (empty squares). The starting values for other variables were as follows: 5 eggs · cc soil^-1, 0.1 adults · cc soil^-1, 0.1 J2 · cc soil^-1, and 0.25 g roots · cc soil^-1. (D) Effect of increasing initial fungus densities on the maximum number of eggs · cc soil^-1 observed in the cycle.