Mustapha Bundu provided a glimmer of hope for the home side with a goal in the 79th minute, igniting belief in a late equaliser. However, despite mounting pressure and several attempts to create chances, Plymouth were unable to grab a draw.
"There is no denying, we know we are going through a difficult moment, and sometimes when you are going through a difficult moment them small things become big things and seem to go against you, and certainly they have tonight," Rooney admitted.
"We have to do better. We have to show a bit more resilience. I know we have got a lot of young players in there as well but we have to become men very quickly because it doesn't get any easier. We have got a really tough game Saturday (away to Sheffield United) and then a really tough fixture list over Christmas. We need to find that resilience, and dig in and stay in games more than what we are doing."