Effect of injected dikegulac and maleic hydrazide on the trimming cycle of American sycamore, silver maple, and eucalyptus at various locations.
| Treatment | Location | Estimated extension of trimming cycle (years) | |
|---|---|---|---|
| Dikegulac | MH | ||
| Sycamore | |||
| 1977 | Philadelphia, PA | 1 | 1 |
| 1977 | Augusta, GA* | 0 | 0 |
| 1977 | San Jose, CA | 1 | 0 |
| 1979 | St. Louis, MO | 1 | 0 |
| 1979 | Philadelphia, PA | 0 | 0 |
| Silver maple | |||
| 1977 | Elyria, OH | 0 | 0 |
| 1977 | Delaware, OH* | 2 | 1 |
| 1979 | Hagerstown, MD | 1 | 0 |
| 1980 | Erie, PA | 0 | 0 |
| Eucalyptus | |||
| 1977 | Greenfield, CA | 2 | 2 |
| 1978 | Hayward, CA | 1 | 1 |
| 1980 | St. Petersburg, FL | 1 | 0 |