Aerial application of fungicide with different equipment and application volume on grain quality, productivity and disease control of irrigated rice/Aplicacao aerea de fungicidas com diferentes equipamentos e volumes sobre a produtividade, qualidade de graos e controle de doencas em arroz irrigado

Phytossanitary treatment on irrigated rice are usually done by aerial application. In face of that, the aim of this project was to evaluate yield, grain quality and disease in rice CV Puita Inta CL through the fungicide Azoxystrobin+difenoconazole application with 20 and 30L [ha.sup.-1] using deflecting nozzles, 20 and 30L [ha.sup.-1], tapered nozzles with 20 and 30L [ha.sup.-1] as well as rotary atomizers disk with 10 and 15L [ha.sup.-1]. The plots sprayed with rotary atomizer disk using 10L [ha.sup.-1] and tapered nozzles using 30L [ha.sup.-1], received a second application15 days later. The evaluated parameter were leaves disease control, yield, income and grain pathology. There were no differences detected between treatments in the field, however, the assessments revealed important post harvest control of Fusarium sp., Gerlachia sp. and Bipolaris sp. Key words: Oryza sativa, aero-Application, pathogens, seed pathology. Os tratamentos fitos sanitarios na cultura do arroz irrigado geralmente sao realizados via aplicacao aerea. Por isso, o trabalho objetivou avaliar a produtividade, qualidade do grao e incidencia de doencas em arroz da cultivar PuitaInta CL'atraves da aplicacao dos fungicidas Azoxistrobina e Difenoconazol com bicos defletores, 20 e 30L [ha.sup.-1], bicos conicos 20 e 30L [ha.sup.-1] e atomizadores rotativos de disco 10 e 15L [ha.sup.-1]. Os tratamentos realizados com atomizador rotativo de disco 10L [ha.sup.-1] e bico conico 30L [ha.sup.-1], receberam uma segunda aplicacao 15 dias apos. Os parametros avaliados foram os niveis de doencas foliares, peso de mil graos, numero de graos por panicula, patologia de sementes, renda e rendimento. Nao se verificou nenhuma diferenca entre os tratamentos em nivel de campo, entretanto, as avaliacoes pos- colheita revelaram importante controle dos fungos Fusarium sp., Gerlachia sp. e Bipolaris sp. Palavras-chave: Oryza sativa, aeroapli cacao, patogenos, patologia de sementes.