The predation of lady beetle,Chilocorus bijugus Mulsant to arrowhead scale,Unaspis yanonenisis Kuwana was studied in laboratory.The functional response of lady beetle to arrowhead scale was determined as Holling's type II.The mutual interference in individual predators can be described by using Hassell and Varley's equation.The predation efficiency(E) of predator varied with environmental temperature.The effect of temperature on search rate (a) and handling time (Th) can be described by using the quadratic ...