The meeting, which falls on polling day, is taking place at East Malling Research' Bradbourne House in East Malling, Kent at 2pm.
There, Bragg is discussing the HDC's next step following the consultation held earlier this year on the AHDB levy calculation.
Top fruit growers from Kent and other parts of the country are so disappointed with the way their AHDB-HDC levy is calculated they hope to vote themselves out of the organisation at its next five-yearly review.
From last year, the top fruit levy became based on growers' turnover instead of the size of their orchard areas, to bring the calculation method in line with that of other levy payers.
This raised the number of top fruit growers not paying a levy from 17 per cent to 53 per cent, leaving many of those remaining with a larger bill.
Sean Rickard, an agricultural economist at Cranfield University, last year reviewed the new levy calculation methods in a report commissioned by the HDC.
He made several recommendations, one of which was to lower the threshold to £20,000 - equivalent to the former orchard size threshold of 2ha.
The AHDB then launched a consultation, which ended in February, asking all levy payers whether Rickard's recommendations should be implemented across the entire horticulture regime.
Other guest speakers at the poll-day meeting include senior policy advisor for NFU South East Sandra Nichols, who is opening the meeting, NFU Horticulture Board chairman Sarah Pettitt and NFU Horticulture chief advisor Phil Hudson - who are discussing the NFU priorities and current work with growers.