RESUMO O coentro é uma olerícola de grande importância no Brasil, principalmente por suas propriedades medicinais e utilização como temperos nas receitas nordestinas e geração de renda para pequenos produtores. No entanto agentes fitopatogenicos têm causado diminuição na área plantada dessa olerícola, em grandes áreas produtivas no estado da Paraíba. Esse trabalho objetivou identificar o agente causal de tombamentos em plantas de coentro no município de Lagoa Seca, PB. O experimento foi

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... o no laboratório de Fitopatologia (LAFIT), da Universidade Federal da Paraíba (UFPB). Foram coletadas plantas de coentro, de uma propriedade rural de Lagoa Seca, PB que apresentavam sintomas de murcha e tombamento. Após a observação dos sintomas as plantas Palavras-chave: Fusarium spp, ABSTRACT Coriander is a vegetable of great importance in Brazil, mainly for its medicinal properties and use as a condiment in Northeastern recipes and in the generation of income for small producers. However, phytopathogenic agents have caused a decrease in the planted area of this garden, in large productive areas in the state of Paraíba. This work aimed to identify the causal agent of tipping in coriander plants in the city of Lagoa Seca, PB. The experiment was conducted at the Phytopathology Laboratory (LAFIT), at the Federal University of Paraíba (UFPB). Coriander was collected from a rural property in Lagoa Seca-PB that showed symptoms of wilting and tipping. After observing the symptoms, the plants were sent to LAFIT, where the plant was isolated, in a culture medium of Potato Dextrose and Agar. After 7 days of isolation, the fungus colonies were identified under an optical microscope. After obtaining the pure culture of the pathogen, Koch's postulates were continued. After the observation of the symptoms, the inoculation was made in coriander with a suspension of 1 x 105 spores / mL, and the reproduction of the symptoms was observed. Then, the isolation of previously inoculated plants, of symptomatic plants was carried out in comparison with the collected coriander plants, which had the same symptoms, of withering and tipping. In this way, all the steps that make up Koch's postulates were carried out. Therefore, through the tests carried out, the pathogen identified was the fungus Fusarium sp., Confirming to be the causal agent of the tipping of coriander seedlings in the municipality of Lagoa Seca, PB.