Die Kosten der Koexistenz von gentechnisch veränderten und biologischen Kulturen: Fallbeispiele aus Frankreich und der Grenzregion

Summary

Coexistence issues have been to a large extent focused on technical measures to
avoid the adventitious presence of gm material in non-gm crops. Information about
costs involved in growing GM, conventional and/or organic crops in the same agricultural
system are not available. In this case study, we investigated the coexistence
costs of gm and non-gm grain maize for the gm maize and the non-gm maize producer.
From our simulation results we can conclude that the benefits of gm maize production
can only cover the potential coexistence and management costs in cases of i)
small discard zone distances and ii) in cases with high gm maize adoption rates of
90%.