40 CFR 158.1726: Spiders.

(a) General. The table in this section applies to spiders. The product labeling claim determines the required test species. The required test species for spider labeling claims appear in paragraph (b) of this section.

(b) Test species. For products making a claim against spiders, the test species for labeling claims appear in the following table.

Table 1 to Paragraph (b)—Required Test Species for Products Making a Claim Against Spiders

Labeling claim Required test species

Pest Group Claim

Spiders Testing on two species is required: Brown recluse spider (Loxosceles reclusa).

AND One of the following species is required: Northern black widow spider (Latrodectus variolus) OR Southern black widow spider (Latrodectus mactans) OR Western black widow spider (Latrodectus hesperus).

Pest Sub-Group Claims

Black Widow Spiders Testing on one of the following species is required: Northern black widow spider (Latrodectus variolus) OR Southern black widow spider (Latrodectus mactans) OR Western black widow spider (Latrodectus hesperus).

Pest-Specific Claims

Brown recluse spider Brown recluse spider (Loxosceles reclusa).

Brown widow spider Brown widow spider (Latrodectus geometricus).

Northern black widow spider Northern black widow spider (Latrodectus variolus).

Southern black widow spider Southern black widow spider (Latrodectus mactans).

Western black widow spider Western black widow spider (Latrodectus hesperus).