Chemical ecology in forest insect plant interactions depicts the intrinsic behaviour of infochemicals/botanicals which explicit the signals toward insect pests, diseases, hosts behaviour. The book is also highlighting the emerging trends of chemical ecology as a multidisciplinary field among the biologists and the role of plant secondary metabolites on insect, induce resistance in host plant as well as the invaders. Plant volatile is the one area where the behavioural diversity of natural enemies and tritrophic interactions among the host ? insect ? parasite interactions has been discussed. This volume is also focusing the biochemical prospecting of phytochemicals associated with forest resources with reference to anti-infective activity, chemical diversity in diverse ecosystem.