After the break the Bulls pulled away with two tries apiece from Rikki Sheriffe and Brett Kearney.
But a handling error by winger Rikki Sheriffe allowed Delaney to score within two minutes of the restart.
And it soon became 63-3 when Rikki Clarke pushed forward and was bowled through the gate by left-arm spinner Dinuk Hettiarachchi.
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Of England's history-making touring party to the Caribbean, only Rikki Clarke and the retired Nasser Hussain won't be going to South Africa.
Harriers equalised when Boro keeper Rikki Banks did not deal with a long ball and Tom Shaw was able to tap in.
When Rikki Clarke hit two boundaries from the penultimate over, that left the visitors needing just eight to win from the final over.
But the hosts created precious little against an under-strength Wasps who were missing Simon Shaw, Dave Walder, Ben Jacobs, Rikki Flutey and Richard Haughton.
But Rikki Clarke kept his nerve to earn the Bears, Division Two winners in the County Championship last year, another success for coach Ashley Giles.
Two stunning efforts in the first eight minutes from Nick Scruton and Rikki Sheriffe paved the way to a seven-try victory for Steve McNamara's men.
The Wildcats crossed early on through Jamie Rooney but tries from Danny Orr, Matt Gafa, Michael Worrincy and Rikki Sheriffe gave Harlequins a 20-6 lead.
Franks, who followed Adams' lead by bowling six straight maidens, removed Rikki Clarke and Ateeq Javid, before Sidebottom claimed the scalps of Ambrose and Keith Barker.
His curate's egg of an innings continued with successive fours off Rikki Clarke, and he then took 17 off Paul Collingwood's only over of the innings.
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Caines drilled home from 12 yards just when visiting keeper Rikki Banks appeared to have saved his side with a double block from Aaron Farrell and Knights.
Resuming on 99-3, opener Matt Walker was run out early on for 38 before Rikki Clarke (3-20) and Chris Woakes (3-69) helped bowl out Essex for 193.
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Jamie Pipe survived the hat-trick ball but was caught off a lifting delivery from Anyon and captain Rikki Clarke was lbw when he played across the line at Carter.
Sreesanth ended the partnership with a double strike just after lunch, Voges edging to Bell at gully and Ali Brown fending a rising ball to Rikki Clarke in the slips.
Resuming on 51, Rogers, who replaced Rikki Clarke at the helm this month, hit a total of 32 fours and a six in his top score in two spells at Derby.
Anderson then took out Tim Ambrose's off-stump and removed 17-year-old Ateeq Javid and Rikki Clarke in a three-over spell to complete his five-wicket haul and confirm his sharpness for the Ashes.
Chris Woakes, selected for the England Lions side to meet the West Indians next week, was not at his best with the new ball and Rikki Clarke's first three overs cost 28 runs.
And Bradford had winger Rikki Sheriffe back in after recovering from the hamstring injury that forced him to miss last week's win over Wigan Warriors, while Glenn Hall replaced Jamie Langley in the forwards.
But Trott continued to find partners, putting on 69 for the fifth wicket with Tim Ambrose (28), a further 72 with Rikki Clarke (36) and then 96 for the seventh wicket with Ant Botha.
Malan was lucky to escape when he also edged a drive but Rikki Clarke spilled the chance diving in front of Chris Rogers - who has just replaced him as captain - at first slip.
The best their bowlers could do was wait for a mistake by the batsmen and Ian Westwood obliged in Graham Wagg's third over of the morning when a loose drive resulted in a smart catch by Rikki Clarke at second slip.
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