Traps are placed using one of 4 different trapping grids: 1X1, 1X4, Special Sites and Delimiting. A 1X1 grid is 1 trap per square mile, a 1X4 grid is 1 trap per 4 square miles, Special Sites are those areas that are considered high risk for importing gypsy moth and delimiting is the use of multiple traps in one location where moths were caught the previous year.

Traps are placed on a 2km grid.  Special Sites are placed in areas considered high risk. Delimiting traps are placed on a 500 meter grid. This program is a band that starts at the 10 moth trap line and extends 120km ahead of that line.
| Slow the Spread Survey |

February 9, 2009