Table 4.
Percentage of pooled samples passing the B. thuringiensis subsp. kurstaki PCR screen and B. thuringiensis subsp. kurstaki culture for wipe, water, grass, and leaves for each locationa
| Location and time period | % Samples |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wipe |
Water |
Grass |
Leaves |
|||||||||
| n | PCR | Culture | n | PCR | Culture | n | PCR | Culture | n | PCR | Culture | |
| Fairfax County, VA | ||||||||||||
| Background | 51 | 0 | 0 | 6 | 0 | 0 | 21 | 0 | 0 | 23 | 0 | 0 |
| 0 wks | 42 | 7 | 0 | 7 | 0 | 14 | 15 | 80 | 7 | 21 | 48 | 10 |
| 6 wks | 40 | 10 | 20 | 6 | 0 | 17 | 14 | 0 | 7 | 16 | 0 | 6 |
| 12 wks | 40 | 0 | 13 | 3 | 0 | 0 | 17 | 0 | 0 | 20 | 0 | 5 |
| 24 wks | 41 | 2 | 5 | 5 | 0 | 0 | 15 | 0 | 0 | 18 | 6 | 0 |
| 48 wks | 39 | 0 | 26 | 6 | 0 | 50 | 13 | 0 | 0 | 19 | 0 | 0 |
| Seattle, WA | ||||||||||||
| Seattle, control | 39 | 0 | 0 | 3 | 0 | 0 | 0 | NA | NA | 0 | NA | NA |
| Kent, 2007 | 40 | 23 | 3 | 1 | 0 | 0 | 0 | NA | NA | 0 | NA | NA |
| Madison, 2006 | 40 | 5 | 0 | 0 | NA | NA | 0 | NA | NA | 0 | NA | NA |
| Rosemont, 2006 | 39 | 0 | 0 | 0 | NA | NA | 0 | NA | NA | 0 | NA | NA |
| Eastlake, 2005 | 43 | 0 | 16 | 1 | 0 | 0 | 0 | NA | NA | 0 | NA | NA |
| Bellevue, 2004 | 44 | 0 | 0 | 0 | NA | NA | 0 | NA | NA | 0 | NA | NA |
a
The percentages of total pooled samples (n), samples passing the B. thuringiensis subsp. kurstaki PCR screen (PCR), and B. thuringiensis subsp. kurstaki culture samples (Culture) for wipe, water, grass, and leaves were determined for each location. NA, not applicable for samples not collected.