Moreover, many species of flowering plants have been documented as being attractive to beneficial insects. However, floral attractiveness is dependent on number of factors including color, pollen, nectar and morphology (Colley & Luna, 2000) and there remains a lack of consensus as to which plants are most attractive. Color is one of the most important cues for insect recognition of flowers (Kevan et al., 1996). Wildflower can provide means to enhance natural enemy populations in arable land and to increase their regulative power on pests (Winkler et al., 2006). Flying insect to their hosts, the colour affects both the number of runs a female makes on a plant and the number of probing, and reproduce in flowers are often attracted to blue. Also,
