under no-flux boundary conditions in a bounded planar convex domain with smooth boundary, where f and S are given parameter functions on Ω × [0,∞)2 with values in [0,∞) and R2×2, respectively, which are assumed to satisfy certain regularity assumptions and growth restrictions. Systems of type (), in the special case S ≡“1 0 0 1 ” reducing to a version of the standard Keller–Seg…
BACKGROUND: Neonicotinoids are widely used as seed treatments in wheat fields against the grain aphid (Sitobion avenae F.) in China. Due to the degradation of neonicotinoids in wheat plants, wheat aphids are more likely to be exposed to low concentrations of neonicotinoids over long periods. It is therefore expected that neonicotinoids, aside from acute (lethal) effects, may also cause a range …