HARARE, July 25 (Xinhua) -- Zimbabwean main opposition MDC Alliance leader Nelson Chamisa said Wednesday his party will not boycott the July 30 polls despite the electoral body refusing to address some of its concerns.

The opposition party accuses the Zimbabwe Electoral Commission (ZEC) of being biased in favor of the ruling ZANU-PF and of refusing to implement electoral reforms including ensuring greater transparency on the voters' roll and the ballot paper.

The ZEC has denied the accusations.

Chamisa told reporters that his party has put in place anti-rigging mechanisms to stop any vote manipulation.

"We cannot boycott our victory. The talk of boycotting is a machination by ZANU-PF to try and get us in a state of despondency," Chamisa said.

He urged his supporters to vote overwhelmingly on July 30, saying this is the only way to overcome any possible vote rigging.

The 40-year-old Chamisa is President Emmerson Mnangagwa's main challenger in the presidential polls where 21 other candidates are vying for the top political post.

Mnangagwa has promised to deliver credible elections and has told the aggrieved opposition to seek recourse in courts on their electoral concerns.