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The use of paddy as seed has increased year after year in the Colombian Humid Caribbean, due to the fact that the farmer uses part of the grain harvested in his lots, exchanges with other farmers or acquires it from some mills that finance the product in the region. Due to the above, the following research was proposed whose objectives were: to analyze the quality of the paddy used as seed in La Doctrina, Lorica, Córdoba, determine the frequency of pathogens in the paddy and evaluate the presence of diseases in the crop cycle in lots sown with paddy used as seed. Samples equivalent to 1 kg of the seed were collected at the time of sowing commercial lots in the irrigation district of La Doctrina, Lorica, Córdoba, from the paddy used as seed. A percentage of stained grains of 5% and a percentage of impurities of 8.3% were recorded. 10 pathogens associated with the seed used for sowing were isolated. In the rice field, Gaeumannomyces sp., Registered the highest percentage of frequency (20%), followed by Aspergillus sp. and Curvularia sp. with 14.3% and 14.2% frequency respectively. The bacterium Burkholderia glumae was determined in the paddy used as seed. The most frequent pathogen from the state of emergency to the moment of harvest, in all the samples evaluated was Helminthosporium sp., Followed by the Piricularia oryzae fungus. The incidence and severity of both pathogens and the presence of other associated fungi during the different stages evaluated were low. [ABSTRACT FROM AUTHOR]