The juveniles post rearing production of shrimp farming presents problems related to diseases caused by viruses and bacteria, causing losses of millions of dollars each culture cycle. Conventional medications have caused pathogen resistance, and extracts of phenolic compounds from allopathic plants represent an alternative that has proven useful in combating these diseases. The present work determined the effect on growth and survival of microencapsulated phenolic extracts of two allopathic plants from the Sinaloa region included in commercial shrimp feed. Highly significant concentrations of phenolics in plants and antioxidant capacity were determined in the in vitro assays. One plant microencapsulated extract showed not significantly different to antibiotics and the other one showed higher significantly antibiotic capacity than oxytetracycline control in vitro. On the other hand, the significantly high survival (p > 0.05) in the microencapsulated treatment after the consecutive infections of WSV (80% at 15th day), and V. parahemolitycus (60% after 19th day) have showed how microencapsulated phenolic compounds could be an alternative to commercial antibiotics as well as an antiviral prophylactic medicine, without affecting the growth of treated juveniles (Fig.1).