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§ 158.1748 Keds, screwworms, and bot flies.

40 CFR 158.1748

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  9. Subpart R
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  11. 40 CFR 158.1748
Citation40 CFR 158.1748
CorpusDaily eCFR
Displayed edition2026-04-15
Last updated2026-04-15

§ 158.1748 Keds, screwworms, and bot flies.

(a) General. The table in this section applies to keds, screwworms, and bot flies. The product labeling claim determines the required test species. The required test species for labeling claims appear in paragraph (b) of this section.

(b) Test species. For products making a claim against keds, screwworms, and bot flies, the required test species for a labeling claim appear in the following table.

Table 1 to Paragraph (b)—Required Test Species for Products Making a Claim Against Keds, Screwworms, and Bot Flies

Labeling claimRequired test species
Bot Flies (excluding Human bot fly)Testing is required on one of the following species:
Horse bot fly (Gasterophilus intestinalis) OR Throat bot fly (Gasterophilus nasalis) OR Nose bot fly (Gasterophilus haemorrhoidalis).
Human bot flyHuman bot fly (Dermatobia hominis).
KedsTesting is required on the following species:
Sheep ked (Melophagus ovinus).
ScrewwormsTesting is required on one of the following species:
Screwworm (Cochliomyia hominivorax) OR Secondary screwworm (Cochliomyia macellaria).