Response of Coranus spiniscutis Reuter to Leptocorisa varicornis F. and Earias vittella (F.)

Functional response of adult predator Coranus spiniscutis to Leptocorisa varicornis and Earias vittella was studied. Functional response was observed at various prey densities such as 1, 2, 4, 8 and 16 in vitro showed that the predatory efficiency of C. spiniscutis was increased when prey density increased. When prey density increased, the attack ratio decreased, on the other hand searching time was also decreased. The components of the functional response fitted significantly the random model of the Hollings disc equation, y=a (Tt-by)x, evidencing type II functional response curve.