40 CFR § 158.1748 - Keds, screwworms, and bot flies.

---
identifier: "/us/cfr/t40/s158.1748"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 158.1748 - Keds, screwworms, and bot flies."
title_number: 40
title_name: "Protection of Environment"
section_number: "158.1748"
section_name: "Keds, screwworms, and bot flies."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "E"
subchapter_name: "PESTICIDE PROGRAMS"
part_number: "158"
part_name: "DATA REQUIREMENTS FOR PESTICIDES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "7 U.S.C. 136-136y; 21 U.S.C. 346a."
regulatory_source: "72 FR 60957, Oct. 26, 2007, unless otherwise noted."
cfr_part: "158"
---


# 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 claim | Required test species |
| --- | --- |
| Bot Flies (excluding Human bot fly) | Testing is required on one of the following species:Horse bot fly () OR Throat bot fly () OR Nose bot fly (). |
| Human bot fly | Human bot fly (). |
| Keds | Testing is required on the following species:Sheep ked (). |
| Screwworms | Testing is required on one of the following species:Screwworm () OR Secondary screwworm (). |