The ability of learning helps in the provision of parasitoid with the plasticity of behaviour for adapting such responses as per the suitability of foraging prevailing opportunities. This further helps in maintaining genetic variability in the naturally populated parasitoids for the promotion of long- term stability of population and assistance to conserve genetic diversity in order to ensure flexibility in selection of host. Based on the above discussed research questions, further discussion will be conducted to collaborate the results of this research. The research questions are as follows:
1. In reference with preliminary data, it is a well- known fact that in an olfactometer of two chambers, plants aphid induced plant that carry Hamiltonella defensa, the symbiont hold less attractiveness in comparison with Aphidius ervi that is a parasitoid. When the level of attraction of aphid induced plant without and with the symbiont is compared, the preference of aphid induced plants with symbiont is high. In this context, the key objective of this research is focused on exploring the impact of aphid density on attraction of parasitoid within the olfactometer. This paper will focus on assessing the minimum density of symbiont being carried by an adult aphid that further results in triggering response with similar attraction of wasp. This will be done by comparing plants induced with 10 adult aphids in the absence of any symbiont.
2. Further ahead, considering the case of microcosm cage, can aphids enjoy some benefits from the reduction of attraction by HIPV? In the specific sense, it has been hypothesized that when comparing plant aphids that had been induced previously without the symbiont, such aphids will be having less attraction for parasitoid A. ervi.
Synomones induced by herbivore also have key involvement in the location of habitat by aphid parasitoids. A great upwind flight had been recorded by Guerrieri et al. (1993) as A. ervi responded to a system of plant- host than to either the plant along or aphid in the tests of wind tunnel. The parasitoid also can be seen responding to a number of plants damaged by host from which there had been a removal of aphids. There had been a demonstration of similar response to the complec plant- host by A. ervi by Powell et al. (1998) and Du et al. (1997). The response of female to broad plants of beans damaged due to Acyrthosiphon pisum had been greater in comparison with mechanically damaged or undamaged plants. There had also been more response of parasitoid to the damaged bean plants inclined toward A. pisum than to the infested plants of Aphis fabae.