Darlington brought on teenager McGurk for his first team debut at half time in place of Reed.
And the visitors took the lead on 54 minutes when Hodgson crossed for Campbell to head home at the far post. Scott Stamps was booked for arguing after Darlington took the lead
It was a controversial goal from the young midfielder as Darlington had just been awarded a disputed throw-in down the right-hand flank.
Stamps was booked for arguing the decision.
Darlington forward Jackson was cautioned for kicking the ball away on 63 minutes, giving Harriers a free kick 25 yards out and Bird placed well over the bar.
Minutes later, Wainwright put in a great cross from the right for the visitors but Jackson hooked his shot wide from close range.
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