The activities of gangmasters in the horticultural and agricultural industries is set to come under parliamentary scrutiny.
The Environment, Food and Rural Affairs Committee is to conduct an inquiry into the system, chaired by Colin Breed, MP.
A spokesman said: "The inquiry will, in particular, consider the activities of some gangmasters in employing illegal immigrants and benefit claimants."
It will also consider the impact of illegal activities on legitimate gangmasters, farmers and other hirers, retailers and the competitiveness and viability of certain agricultural practices.
The spokesman added: "The Committee will also look at what might be done to combat illegal activity by gangmasters."
The inquiry is calling for written evidence to be submitted by the industry before Friday, April 25.