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ABSTRACT: Soybean Glycine max ( L.) Merrill is affected by the field wide range of fungal diseases , some bacteria , and viruses and nematodes . Cercospora leaf spot , or stain - frog-eye, caused by the fungus Cercospora sojina Hara , causes severe losses in soybean cultivation. Currently , there is evidence of 25 races of the pathogen in Brazil and new races may occur . Goal from work was to determine the level of incidence of C. sojina Hara in transgenic soybean BRS Valuable RR Maranhao . The test was installedin the area of the Rural Union of Empress , located in BR 010 Km 24 . The experiment was arranged in blocks with split plot design with four replications , were used five treatments with five different doses of agrosilicio . The evaluation of the experiment was carried out 60 days after planting and is performed by visual readings , using a diagrammatic key to the quantification of disease to late season soybean crop . Symptoms were found to stain eye frog in only 9 parcels , most of the infected plants showed leaf area with patches of 1 to 5% and 6-15 %, treatments with 0 and 8 t / ha agrosilicio a higher incidence of gray leaf spot , doses 1, 2 and 4 t / ha agrosilicio not differ in disease incidence. KEY- WORDS: cercosporiose , culture, incidence.

SEVERIDADE DE Cercospora sojina HARA EM SOJA TRANSGÊNICA BRS VALIOSA RR NO ESTADO DO MARANHÃO, SOB DIFERENTES DOSAGENS DE AGROSILÍCIO