Percentage of diseased American elms categorized by extent of crown Involvement as illustrated in Figure 1, Wisconsin communities.
| Crown category | ||||||
|---|---|---|---|---|---|---|
| Month | 1 | 2 | 3 | 4 | 5 | 6 |
| Community A | ||||||
| June | 1 | 0 | 2 | 3 | 7 | 26 |
| July | 11 | 12 | 4 | 3 | 13 | 18 |
| Community B | ||||||
| June | 0 | 2 | 1 | 8 | 16 | 23 |
| July | 0 | 0 | 2 | 8 | 12 | 14 |
| August | 0 | 0 | 0 | 2 | 8 | 4 |
| Community C | ||||||
| June | 9 | 15 | 4 | 8 | 10 | 9 |
| July | 1 | 4 | 5 | 2 | 4 | 1 |
| August | 0 | 6 | 5 | 8 | 7 | 2 |