This "Handbook on Rearing trichogramma" is a practical guide written for systematically rearing and propagating trichogramma parasitic wasps, which are important biological allies in agriculture. These parasitic wasps have the ability to destroy the eggs of rice stem borers and other crop pests, thus helping to reduce the use of chemical pesticides. The book is structured into five sections for step-by-step learning: 1. Basic Concepts - fundamental principles worth knowing in rearing; 2. Introduction to trichogramma parasitic wasps - life cycle and natural habits; 3. Rearing process of Trichogramma - structure of the wasp; 4. Method for rearing rice borer eggs - step-by-step procedures, life cycle, and related information; 5. Mass propagation method for Trichogramma - techniques for large-scale production and storage methods.