Village of Downers Grove gypsy moth trapping results. All trapping programs for 1981, 1982, 1983, and 1984.
| 1981 | 1982 | 1983 | 1984 | |
|---|---|---|---|---|
| No. of moths caught | 73 | 28 | 2 | 1 |
| No. of traps with positive catches | 20 | 21 | 2 | 1 |
| No. of traps with multiple catches | 11 | 3 | 0 | 0 |
| Trapping density per square mile within treatment area | 32 | 1920 | 1920 | 1920 |
| Trapping density per square mile outside treatment area | 1 | 32 | 32/9* | 32/9* |
↵* 32 traps/sq. mile throughout 4 sq. miles and 9 traps/sq. mile throughout the remaining area