161.540—Plant protection data requirements.
(a) Table.
Sections 161.100 through 161.102 describe how to use this table to determine the plant protection data requirements and the substance to be tested.
| Kind of data required | (b) Notes | General use patterns | Terrestrial | Food crop | Nonfood | Aquatic | Food crop | Nonfood | Greenhouse | Food crop | Nonfood | Forestry | Domestic outdoor | Indoor | Test substance | Data to support MP | Data to support EP | Guidelines reference No. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Target area phytotoxicity | (1) | EP | EP | 121-1 | ||||||||||||||
| Nontarget area phytotoxicity | ||||||||||||||||||
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| Tier I: | ||||||||||||||||||
| Seed germination/seedling emergence | (2) | R | R | R | TGAI | TGAI | 122-1 | |||||||||||
| Vegetative vigor | (2) | R | R | R | TGAI | TGAI | 122-1 | |||||||||||
| Aquatic plant growth | (2) | R | R | R | TGAI | TGAI | 122-2 | |||||||||||
| Tier II: | ||||||||||||||||||
| Seed germination/seedling emergence | (3) | CR | CR | CR | TGAI | TGAI | 123-1 | |||||||||||
| Vegetative vigor | (3) | CR | CR | CR | TGAI | TGAI | 123-1 | |||||||||||
| Aquatic plant growth | (4) | CR | CR | CR | TGAI | TGAI | 123-2 | |||||||||||
| Tier III: | ||||||||||||||||||
| Terrestrial field | (3) | CR | CR | CR | TEP | TEP | 124-1 | |||||||||||
| Aquatic field | (4) | CR | CR | CR | TEP | TEP | 124-2 | |||||||||||
| Key: CR=Conditionally required; TGAI=Technical grade of the active ingredient; EP=End-use product; TEP=Typical end-use product. | ||||||||||||||||||
| (b) Notes. The following notes are referenced in column two of the table contained in paragraph (a) of this section. | ||||||||||||||||||
| (1) Data are required for Special Review and certain public health situations. | ||||||||||||||||||
| (2) Data are required for pesticides to be used in forests and natural grasslands. For herbicide used in forest site preparation; the acquatic plant growth tests will be required. Data are required to support products to be used in other locations when any of the following conditions are met: | ||||||||||||||||||
| (i) Phytotoxicity problems concerning the product arise and open literature data are not available to address the problems. | ||||||||||||||||||
| (ii) The product may pose hazards to endangered or threatened species. | ||||||||||||||||||
| (iii) Special Review has been initiated on the product. | ||||||||||||||||||
| (3) Required if a 25 percent or greater detrimental effect was found in 1 or more plant species in the corresponding test of the previous tier. | ||||||||||||||||||
| (4) Required if a 50 percent or greater detrimental effect was found on any plant species in the corresponding test of the previous tier. | ||||||||||||||||||