DeMbare were just over 15 minutes away from being taken to a penalty shootout by the struggling side but Mavhunga struck a sensational first curler from outside the box to earn his team a place in the knockout quarterfinals of the competition.
The stunning goal, scored in the 73rd minute, saved Dynamos from nightmare after a frustrating afternoon in which they created a handful of chances but failed to hit the target.
WhaWha, as expected, defended in the first half and found their rhythm late in the second, especially after Calum English-Brown came on.
English-Brown was so good in those few minutes that his name was chanted aloud by Dynamos fans, who invited him to their bay for a post-match salute.
Dynamos coach Tonderai Ndiraya was frustrated with the number of chances his men missed in a game largely dominated by the home side.
“I’m happy that we have qualified to the next round of the competition but not entirely happy with the way we performed today especially in the first half,” Ndiraya mourned.
“When you fail to put the game to bed you start to become impatient and desperate, but I’m glad that we kept our cool in the second half and continued to create chances.
“I would have wanted us to score from the numerous chances that we created but, in the end, it took the anticipation and brilliance of Trevor to score that goal,” he added.
Chibuku Super Cup results:
Bulawayo Chiefs 1-0 ZPC Kariba
Manica Diamonds 2-0 Yadah Stars
Dynamos 1-0 Whawha
Triangle United 0-1 Highlanders
Chicken Inn 2-0 Harare City
FC Platinum 2-0 Tenax CS
Black Rhinos 1-0 Caps United
Ngezi Platinum 1-2 Herentals