Fenologia, produtividade e reação de cultivares de soja a Antracnose (Colletotrichum truncatum) e Mancha alvo (Corynespora cassiicola) em Sinop/MT

Abstract

Among the various diseases of soybean crop, some have been highlighted in the northern region of the state of Mato Grosso, such as anthracnose (Colletotrichum truncatum) and the target spot (Corynespora cassiicola). The work evaluate the development of 19 cultivars of conventional soybean at different sowing dates, assess the severity of anthracnose and target spot and present the main characteristics ofthe cultivars. The soybean cultivars were analyzed: BRS (217) Flora; BRSGO 7960; BRSMG winner; BRSMG 810 C; BRS 752 S; BRS 252 (Serena); BRS Jiripoca; BRSGO 8360; BRSGO Chapadões; MG/BR-46 Conquest; BRS Raimunda; BRSGO Jatai; BRS Gralha; BRS Petal; BRS 7560; BRS Aurora; BRS 8660; BRSGO Luziânia and Msoy 8892. All were planted in two different seasons (24/10 – 1 st season, and 15/11 – 2 st season). The cultivars less susceptible to target spot were BRS 252 (Serena); BRS Raimunda; MG/BR-46 Conquest; BRS (217) Flora; BRSGO 8360; BRSGO 7960; BRSMG 810 C; BRS Gralha; Msoy 8892; BRSMG winner; BRS Jiripoca; BRS 752 S and BRS 7560, planted in 1st season. In 2 season, the cultivars with greater resistance were: BRS Petal; BRSGO 7960; BRSMG 810 C; Msoy 8892; BRSMG Conquista; BRS Jiripoca; BRS 752 S and BRS 7560. In relation to anthracnose, the cultivars which presented the greatest resistance were: BRSMG 810C, BRS 752 S, Msoy 8892 and BRS (217) Flora, sown in 1 st season; for the 2 st season cultivars BRSGOLuziânia, BRS Raimunda and BRS 752 S, were the ones that showed greater resistance. The cultivars BRSGO 7960, Brsgo 8660 and BRS Luziânia presented the highest yield in 1° of sowing season, being that in 2 st season cultivars BRSGO 8360; BRSMG 752 S; BRS 252 (Serena); BRSGO Jatai; BRS Aurora and BRS Petal, were those that most produced.