Q.Why are stringent biosafety guidelines particularly important for research and field trials involving genetically modified crops, even before their commercial release?

[!TLDR] Field trials/research on GM crops happen before all long-term safety data may be fully understood, so strict biosafety guidelines are needed to catch and prevent unintended health or environmental harm before any wider or commercial release. …

Research and field trials represent the stage at which a new genetically modified crop is deliberately grown and studied under real, though still controlled and limited, environmental conditions -- as distinct from later commercial release, where the crop could potentially be grown widely and uncontrolled across large areas of farmland. At the research and trial stage, comprehensive, reliable data on a new GM crop's long-term effects -- on human or animal health if consumed, and on the surrounding environment, such as effects on non-target insects, soil organisms, or the possibility of the introduced gene spreading into wild or weedy relatives of the crop through cross-pollination -- may not yet be fully available or understood. …

Focus specifically on why the RESEARCH/TRIAL stage (before commercial release) is the critical point for catching proble …

Do not argue biosafety guidelines are only needed AFTER commercial release -- the question specifically asks about their importance DURING research …