Table 1.

Chemical techniques, location, timing, treatment, carrier, and rate used to control tree-of-heaven.

Treatment methodTreatment locationYear of OctoberHerbicide (trade name)CarrierRate
Stem injectionUniversity of California, Davis1998Imazapyr (Stalker)NoneUndiluted
1998Imazapyr (Habitat)NoneUndiluted
Cut stumpPutah Creek2001Glyphosate (Roundup Pro)50% water50%
2001Imazapyr (Chopper)80% Hasten oil20%
2001Triclopyr (Garlon 4)80% Hasten oil20%
Stem injectionPutah Creek2001Glyphosate (Roundup Pro)NoneUndiluted
2001Imazapyr (Chopper)NoneUndiluted
2001Triclopyr (Garlon 4)NoneUndiluted
Stump injectionPutah Creek2001Glyphosate (Roundup Pro)NoneUndiluted
2001Imazapyr (Chopper)NoneUndiluted
2001Triclopyr (Garlon 4)NoneUndiluted
Basal barkPutah Creek2001Imazapyr (Chopper)80% Hasten oil20%
2001Triclopyr (Garlon 4)80% Hasten oil20%