Table 1.
Study design (top) and number of apartments included in resistance intervention strategies (bottom) tested in parallel at two housing sites in Danville, IL and Indianapolis, IN. Abbreviations are as follow: Ab, Abamectin (bait; Vendetta); Ba, Boric acid (bait; Magnetic); T + λ, Thiamethoxam + λ-cyhalothrin (spray; Tandem); Ab + P, Abamectin + Pyriproxyfen (bait; Vendetta Plus); C, Collect live cockroaches for lab colony rearing and future resistance assessment (RA). Density categories are based on initial month-0 population assessments from average trap catches (ATC): (i) ATC >0 to <6, (ii) ATC > 6 and (iii) adjacent apartments with starting ATC = 0.
| Months post-treatment | Resistance management treatments | |||
|---|---|---|---|---|
| Single AI | Rotation | Mixture | ||
| 0 | May | Ab | Ab | T + λ |
| 1 | June | Ab | Ba | T + λ |
| 2 | July | Ab | T + λ | T + λ |
| 3 | August | Ab | Ab | T + λ |
| 4 | September | Ab | Ba | C + (Ab + P) |
| 5 | October | Ab | T + λ | Ab + P |
| 6 | November | C | C | No action |
| Density category | Number of apartments per treatment | |||
| Indianapolis, IN | i | 5 | 4 | 5 |
| ii | — | — | — | |
| iii | 9 | 15 | 14 | |
| Total | 14 | 19 | 19 | |
| Danville, IL | i | 5 | 6 | 4 |
| ii | 4 | 4 | 7 | |
| iii | 7 | 8 | 3 | |
| Total | 16 | 18 | 14 | |