How farmed insects are killed at harvest has welfare implications that are increasingly examined as the industry scales, with different methods having different welfare profiles.
Insect kill method welfare assessment exists in the awkward space where moral consideration is uncertain but scale demands precautionary attention. If insects can experience distress during prolonged killing processes, the numbers involved make this a welfare concern of enormous potential magnitude. Methods that minimize the transition from life to death - rapid temperature change, high-pressure processing - are preferable on welfare grounds even under uncertainty. Investment in kill method research and adoption of more humane alternatives is justified by the precautionary principle given the scale of production and the plausibility of some degree of insect suffering.