Skipper Liam Harris starred in a hat-trick in the Knights' 36-12 victory.
With injuries, York had fallen to the team's naked bones, but their 17-man team all played their part in Craven Park.
“I'm really proud today because it's a really hard place to come and get a victory, especially on how they look,” Applegarth was enthusiastic.
“We talked all week about backing up a tough victory at Batley.
“Our defensive application was first class and I think everyone was just showing up to each other, and that's kind of like you're a bustling coach.
“Today is the last 17 years old. Someone pulled out Jacob Ganon during the session on Friday, so I couldn't name the 18th guy. I love how close it is.
“There was a period of games, especially right after halftime. I guess we did either way. As a coach, the most enjoyable thing is how we invested in decent positions with just the sleeves and we managed to get through the storm that a very good Barrow team had thrown at us.”
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Both teams matched evenly, from Harris to making something out of nothing.
When Luke Broadbent and Ryan Johnston combined with long-distance efforts, Burrow fought back, but Harris responded the earliest to Paul McShane's grabber before bringing the visitors back forward.
Dee saw an effort to rule out forward passes in the buildup before Harris completed a five-minute hat-trick in the second half.
Ellis Robson temporarily closed the gap to six points, but the Knights quickly showed the Mettle, Jones Bishop picked up a loose pass to wide-out, and Dee crashed from close range to open the score 30-12.
The host continued to be particularly widely threatened, but Harris' penalty killed momentum, and Ferreira finished in the left corner, putting her gloss on the scoreline in the dying minutes.
“I thought it was a proper captain knock from Liam Harris,” he admitted. “To be honest, I don't think I can pass him.
“Jordy Thompson gives us that solid 80 minutes in the middle on some of the Bernstorming runs we all have become accustomed to. But you can go 1-17 and choose what they did well.
“As a coach, it really makes me happy that everyone is doing their job and working hard for the team.”
It was a victory laid on the foundation of a solid opening quarter as York routinely handed over the ball on their terms against the Barrow side, who had only lost once this season.
However, the Knights seem to find their rhythm in the end, and with their discipline, they are heartfelt costly in the early rounds of competition, particularly showing signs of improvement.
“We knew they would throw a lot of shapes at us. Even if you're getting two or three scores up, you don't feel the game is out of their reach.
“It's really important to stay focused about you and not start to get too intense when they take that flashy form. The best way to do that is to hand over the ball on your terms and back up your defenses and get out of some issues.
“I knew that if Burrow was getting too sloppy, Burrow would try to burn scraps.
“It's safe to say that it's our discipline, especially when we're defending half of the opposition. It takes some teams off the hook. We've been working really hard to fix it.
“I know it sounds really boring and really cliché, but that's just doing the basics at this stage this year.
“It's not because of that Hollywood rugby, especially on some of the fields you're playing. What? It's when those glamour passes and off-roads are putting out all the other sets. It's about rolling your sleeves and shattering some rough wins.
“It may have been a few games earlier this year to adapt to it, but now we're adapting to it, so it's starting to become more solid for the team.”
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