Pesticide Biochemistry deals with the mode of action of plant protection agents such as insecticides, fungicides, herbicides, and similar compounds, including nonlethal pest control agents, biosynthesis of pheromones, hormones, and plant resistance agents. It mainly emphasizes on Biochemistry and Physiology of Comparative toxicity, Mode of action, Pathophysiology, Plant growth regulators, Resistance, Other effects of pesticides on both parasites and hosts.