Abstract
Aphidius gifuensis, is an important natural enemy of various types of aphids. In this article the color preference behavior in response to the light intensity of Wasp (A.gifuensis (Ashmead) was investigated. A.gifuensis, is an important natural enemy of the many green plant aphids. Ten monochromatic lights of wavelengths (380 to 655 nm) were used for evaluating the reaction of A. gifuensis (Ashmead) to a different wavelength of light color. We used 10 monochromatic lights (emitting various specific wavelengths from 380 to 655 nm). The strongest response was observed by Blue (495nm), Green (575nm), Violet (425 nm), Ultraviolet (380nm)) and low response is stimulated to Yellow (550nm) and Purple (565nm). There was no significant spectrum response to Orange (607nm) and Red (655nm). Here we noticed that the visual system of A. gifuensis is composed of three spectrum receptors, adjusted to blue, green, and UV light.