Fungicidas para o controle do mofo branco e eficácia no controle da ferrugem asiática da soja

Abstract

The occurrence of diseases in culture of soybean, the asian soybean rust and white mold with, has gained importance due to the damage caused. The objective was to evaluate the effect of fungicides association applied to white mold with fungicide ciproconazole + picoxystrobin base for the control of asian soybean rust. The experiment was conducted at the Experimental Farm of the Federal University of Grande Dourados (UFGD) and Agricultural Microbiology and Plant Pathology Laboratory in Dourados – MS. The trial was a randomized block design with five replications of 10 treatments: (1) attestant; (2) Oranis (800 mL ha-1 ) + Aproach Prima® ; (3) Oranis® (1000 mL ha1 ) + Aproach Prima® ; (4) Zignal® + Aproach Prima® ; (5) Sumilex® + Aproach Prima® ; (6) Oranis® (1000 mL ha1 ) isolado em R1; (7) Fox® ; (8) Aproach Prima® , (9) Priori Xtra® e (10) Opera® . Weekly leaflets samples were drawn for assessment of lesion numbers, urédia and disease incidence. Next to the closure of the cycle were evaluated defoliation and after harvest rated thousand grain weight and yeld. It is concluded that increased picoxystrobin dose ha-1 in strategy by applying Oranis® raised the rust control efficiency. Fluazinam fungicide (Zignal® ) recommended for white mold control features for asian soybean rust.