Table 4.
Duration in days and dates of the seasonally vector-free periods at the 7 collection sites
| 2007/2008 | 2008/2009 | 2009/2010 | 2010/2011 | 2011/2012 | |
|---|---|---|---|---|---|
| Nijlen | 197 (09.10–22.04) | 127 (25.11–31.03) | 201 (12.11–31.05) | 211 (21.09–19.04) | 147 (08.11–03.04) |
| Varendonk | 147 (20.11–15.04) | 140 (12.11–31.03) | 183 (06.10–06.04) | 163 (08.11–19.04) | 140 (08.11–27.03) |
| Neerpelt | 190 (16.10–22.04) | 199 (07.10–23.04) | – (06.10) | – | – |
| Frahan | 154 (20.11–22.04) | 183 (21.10–21.04) | – (17.11) | – | – |
| Goronne | 183 (29.10–28.04) | 190 (21.10–28.04) | – (10.11) | – | – |
| Verlaine | 177 (29.10–22.04) | 198 (06.10–21.04) | 197 (17.11–01.06) | 154 (03.11–05.04) | 166 (28.10–11.04) |
| Gembloux | 170 (16.10–02.04) | 176 (21.10–14.04) | 183 (27.10–27.04) | 168 (20.10–05.04) | 141 (08.11–28.03) |
| Difference in daysa | 50 | 72 | 18 | 57 | 26 |
aDifference in days between sites with the longest and shortest vector free period