The research was carried out at the Yurimaguas Km 17 Research and Teaching Center, of the National University of the Peruvian Amazon - UNAP. The objective was to evaluate the effect of three organic substrates on the breeding of Eisenia foetida, Red Worm in the district of Yurimaguas – Loreto. The data were analyzed through a Completely Block Design with 4 treatments and 4 repetitions. The treatments were: T1: 100% black earth; T2: 40% black soil + 60% cattle manure; T3: 30% black earth + 50% cow dung + 20% kudzu leaves and T4: 20% black earth + 40% cow manure + 20% kudzu leaves + 20% organic fruit waste. The experimental phase lasted 4 months. The best results were achieved in T2: Humus production (417.40 kg); Population increase (23,442 worms); and biomass weight of the worm (11,376 kg); In relation to the best length of the worm, it was obtained in T3 with 6.65 cm. Significant stati...