In recent years, the development of biological pest control strategies has focused on the chemical profiles of insect-plant interactions. Plants exhibit an extensive range of defensive strategies, which include insect avoidance, deterrence and antibiosis. The need to overcome these vegetative defence responses has driven the evolution of an array of detoxifying mechanisms, which have become the hallmark of the phytophagous insects' chemical ecology. This volume presents the advances made on phytochemcial biopesticides, covering behavioural, chemical, biochemical and molecular levels of the field. The role of Phytochemicals in integrated pest management is also addressed, whilst discussing the problems and prospects of biopesticides for commercial exploitation. The volume provides a comprehensive overview for graduate students, research scientists and professionals in chemical ecology, insect-plant interactions, phytochemistry, chemistry and biochemistry of insects, and insect toxicology.