FUNGICIDE SPRAYING TECHNOLOGIES IN THE CONTROL OF ASIAN RUST IN SOYBEAN CULTIVARS

ABSTRACT The adequacy of spraying technology in the control Asian rust to factors related soybean cultivars and fungicide type is fundamental for efficiency this disease. In context, objective was evaluate chemical deposition applied crop, according different volumes spray nozzles. Four field experiments were set up during 2014/2015 season, each carried out with one cultivar, using: NA 5909 RR®, NS 7237 IPRO®, BMX Potência RR® W 712 RR®. experimental design randomized blocks a 2x2x2 factorial arrangement, four replications. first factor corresponded use fungicides: [pyraclostrobin + epoxiconazole] mancozeb; second factor, types nozzle: double triple fan; last application volume: 60 120 L ha-1. highest volume resulted greater droplets canopy plants, regardless fungicide, nozzle cultivar. association fungicides mancozeb showed efficacy controlling rust, when compared epoxiconazole]. promoted less disease evolution IPRO® yields cultivar higher combination used.