The present investigation entitled "Effect of biological products and fungal control A/ternaria and Marssonina in growing broccoli (Brassica oleracea) hybrid Royal Favor F 1 Hyb in the province of Lamas ", aimed to assess the effect of biological and fungal products to determine which has a greater effect doses for the control of Alternaria and Marssonina and perform economíc analysis for each treatment. Statistical design of randomized complete block (RCBD} was used with three blocks and five treatments for a total of 15 experimental units. The results indicate that, by applying phytosanitary control treatments T4 (2 l.ha-1 of Kasugamycin + 0,2 kg.ha·1 of Benomyl) and T3 (2,5 1.ha·1 comptex beneficia! microorganisms) showed greater effect control and resistance to A/ternaria and Marssonina, being so, the incidence of A/ternaria and Marssonina was only 10% for both treatments and seve...