The book serves as a valuable asset for educators, forestry students, research scholars, forest extension personnel, nursery staff, private nursery proprietors, and agroforestry farmers. Notably, approximately 80 percent of tree species are impacted by at least one disease agent, while 75 percent are affected by an insect, underscoring the gravity of the situation. Presence of pests and diseases in plants is also an important factor hindering the increase of forest cover. This text thoroughly includes the complete syllabus pertaining to forest conservation for individuals studying forestry at the graduate level.