In this paper we have studied the dynamical behaviours of a delayed
two-species competitive system affected by toxicant with imprecise biological
parameters. We have proposed a method to handle these imprecise parameters
by using parametric form of interval numbers. We have discussed the
existence of various equilibrium points and stability of the system at these
equilibrium points. In case of toxic stimulatory system, the delay model
exhibits a stable limit cycle oscillation. Computer simulations are carried
out to illustrate our analytical findings.
