Ana Bruna wins A Fazenda 18 Farmer's Challenge, secures immunity

The sixth elimination round of A Fazenda 18 concluded on Wednesday, October 28, with Ana Bruna Ávila winning the Farmer's Challenge and securing immunity from elimination. The competition, held during the live broadcast, featured Ana Bruna, Darlin Ferrattry, and Maíra Charken competing in a time-based task set in a hay maze where participants had to rescue baby sheep and organize them without access to clocks or time markers. The objective was to complete the course as close as possible to three minutes. Ana Bruna recorded a time of three minutes and ten seconds, the closest to the target, earning her the Farmer's hat and immunity.

The sixth farm (roça) formation, which took place on Tuesday, October 27, featured an all-female lineup for the first time in the season. Thaíde, the week's Farmer, nominated Darlin directly to the elimination vote. Giovanna Gold received nine votes from residents and became the second occupant of the farm bench. She then pulled Maíra from the barn (baia). Through the "Resta Um" dynamic, Eduarda initially occupied the fourth position, but Mônica, who held the Red Flame power, used it to replace Eduarda with Ana Bruna. After being placed on the farm, Ana Bruna exercised her veto right and blocked Giovanna from competing in the Farmer's Challenge, preventing her from potentially escaping elimination.

The farm formation was shaped by several power dynamics. Fran Almeida won the Fire Test on Sunday, October 25, earning the Lamp of Power, which granted her the Red Flame advantage—the ability to swap the fourth farm nominee for any participant from the residence or barn. Alfredo Amaral remained immune following Gabriel Torres's inheritance and could not receive votes. The barn population consisted of Alfredo, Ana Bruna, Lucas Bissoli, and Maíra before the vote. Public elimination voting will determine which of the four women—Ana Bruna, Darlin, Giovanna, or Maíra—leaves the program on Thursday, October 29.