Influence of dikegulac and maleic hydrazide on the trimming cycle of various species.
| Treatment year | Species | Location | Estimated extension of trimming cycle (years) | |
|---|---|---|---|---|
| Dikegulac | MH | |||
| 1977 | Red oak* | Lorain, OH | 1 | 0 |
| 1977 | Shamel ash | Hayward, CA | 1 | 0 |
| 1979 | Water oak | Columbus, GA | 1 | 0 |
| 1979-80 | Bigleaf maple | Portland, OR | 1 | 0 |
| 1979-80 | Cotton-wood | Minneapolis, MN | 0 | 0 |
| 1980 | Melaleuca | St. Petersburg, FL | 1 | 1 |
| 1980 | Hackberry | Augusta, GA | 1 | 2 |
| 1980 | Hackberry | Fort Worth, T× | 1 | 1 |
| 1980 | Lombardy poplar | St. Louis, MO | 0 | 0 |
| 1980 | Red maple | Stamford, CT | 0 | 0 |
↵* Trees located in natural woodstand