EN 
PT_BR 
A new fungicide for controlling rust. soy The technology for controlling leaf spots showed positive results in field trials, with productivity gains and satisfactory disease control rates. It is expected that the technology will be available for the 2026-27 crop season.
The ready-to-use mixture of prothioconazole and chlorothalonil, which will be marketed by Sipcam Nichino Brasil as Cortina Gold, was evaluated in experiments with the participation of Multcrop Research and Development. In the Network Trials, which bring together more than 20 agricultural consultancies, gains of 12 to 15 sacks of soybeans per hectare were recorded.
According to researcher Carlos Eduardo Valente, from Multcrop, the product achieved spot control between 56% and 58% compared to the control and showed performance approximately 10% superior to other fungicides evaluated. The mixture also showed effectiveness against rust. "We managed to achieve satisfactory spot control parameters, on the order of 56% to 58% compared to the 'control', in addition to an increase of around 10% compared to other fungicides evaluated," he exemplifies.
For the 2026-27 crop season, the possibility of delayed rainfall and soybean planting could increase rust pressure. Valente also highlighted the stability of the formulation, with no reports of nozzle clogging or phytotoxicity in tests. Commercialization is scheduled for September. “Cortina Gold is an innovative liquid, concentrated suspension (SC) formulation. It already comes with multiple sites and delivers high efficacy against the main foliar diseases of soybeans,” says Eric Ono, the company's product and crop portfolio manager.
