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USDA clears hawkweed biocontrol agent

The USDA’s Animal and Plant Health Inspection Service (APHIS) has determined that the proposed release of the first biological control agent against hawkweeds ( Hieracium spp) would have no significant environmental impact. The APHIS issued an environmental assessment on the hawkweed gall wasp ( Aulacidea subterminalis) for public comment last year ( Agrow No 603, p 13).

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