(b)
search for vectors by means of CO2 traps. The traps must be placed for several hours in the pig stalls preferably during the night and in any event in shady areas out of the daylight. The traps should be constructed in such a way that the vectors are brought close enough to the CO2 source for it to be impossible for them to return to their habitat.
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Source: EUR-Lex (Cellar) · retrieved 2026-11-09 · Text as adopted (Official Journal); later amendments are not incorporated in this text.