Fungicides and ethanolic extract of propolis in the control of late season soybean diseases

Abstract

The productivity of soybean can be affected by several factors, including diseases. Aiming to evaluate nine commercial fungicides and the ethanolic extract of propolis (EEP), for the control of anthracnose, target spot and downy mildew in the soybean culture, in the 2015/16 crop, a study was implanted in a commercial area localized in Sinop/MT. The experiment was performed in randomized block design, with four repetitions. Ten treatments were applied: control; fluxapiroxad+piraclostrobin; trifloxistrobin+prothioconazole; picoxystrobin+cyproconazole; azoxystrobin+benzovindiflupyr; mancozeb; azoxystrobin+cyproconazole; mancozeb+azoxystrobin+cyproconazole; mancozeb+picoxystrobin+cyproconazole and EEP, fortnightly in three growth stages: R1, R3 and R5. The cultivar utilized was Monsoy 8372 IPRO. The treatment picoxystrobin+cyproconazole was the most efficient in the control of downy mildew and target spot. The fungicides and the EEP analyzed did not present efficiency in the control of anthracnose. The use of EEP was efficient in the control of downy mildew and target spot, presenting superiority over some fungicides, and contributing for an increase in productivity. The treatment with the application of picoxystrobin+cyproconazole was superior to the other treatments in relation to productivity and mass of thousand grains.