| Class | Definition | Entry Number |
|---|---|---|
| Class 1 | Insecticides | 567 |
| Class 2 | Herbicides | 566 |
| Class 3 | Fungicides | 398 |
| Class 4 | Acaricides | 183 |
| Class 5 | Plant growth regulators | 85 |
| Class 6 | Nematicides | 43 |
| Class 7 | Rodenticides | 37 |
| Class 8 | Insect attractants | 19 |
| Class 9 | Bactericides | 18 |
| Class 10 | Insect repellents | 17 |
| Class 11 | Algicides | 17 |
| Class 12 | Molluscicides | 16 |
| Class 13 | Herbicide safeners | 11 |
| Class 14 | Miscellaneous | 10 |
| Class 15 | Synergists | 9 |
| Class 16 | Bird repellents | 9 |
| Class 17 | Avicides | 5 |
| Class 18 | Mammal repellents | 4 |
| Class 19 | Plant activators | 4 |
| Class 20 | Antifeedants | 4 |
| Class 21 | Chemosterilants | 3 |
| Class 22 | Mating disrupters | 3 |