Weed Control by Species
Records herbicide and mechanical control methods, products, and satisfaction ratings for invasive weed species in Hawaiʻi, contributed by multiple partner organisations.
403rows
88species, each with its own page
15organisations reporting
9active ingredients
Oct 2026last updated
By active ingredient
Triclopyr
Group 4Synthetic auxin · some products labelled for aquatic sites
166 reports61 species3.8 / 5 average
Best on Acacia mearnsii, Acacia mangium, Ageratina riparia, Ageratina adenophora
Glyphosate
Group 9EPSP synthase inhibitor · some products labelled for aquatic sites
83 reports44 species3.2 / 5 average
Best on Ageratina riparia, Ardisia crenata, Axonopus fissifolius, Cortaderia selloana
Imazapyr
Group 2ALS inhibitor · some products labelled for aquatic sites
58 reports31 species3.5 / 5 average
Best on Ardisia elliptica, Cecropia obtusifolia, Coffea arabica, Grevillea robusta
Aminopyralid
Group 4Synthetic auxin · no aquatic-labelled products
57 reports29 species3.3 / 5 average
Best on Cryptomeria japonica, Delairea odorata, Leucaena leucocephala, Morella faya
Sulfometuron-methyl
Group 2ALS inhibitor · no aquatic-labelled products
6 reports2 species4.5 / 5 average
Best on Pterolepis glomerata, Chromolaena odorata
Fluazifop-P-butyl
Group 1ACCase inhibitor · no aquatic-labelled products
5 reports3 species4.4 / 5 average
Best on Axonopus fissifolius, Paspalum conjugatum, Melinis minutiflora
Aminocyclopyrachlor
Group 4Synthetic auxin · no aquatic-labelled products
4 reports4 species3.8 / 5 average
Best on Acacia confusa, Toona ciliata, Leucaena leucocephala, Corymbia citriodora
Metsulfuron-methyl
Group 2ALS inhibitor · no aquatic-labelled products
1 report1 species4.0 / 5 average
Best on Hedychium gardnerianum
Clopyralid
Group 4Synthetic auxin · no aquatic-labelled products
1 report0 species5.0 / 5 average
| Species | Family | Common Name(s) | Organization | Control Technique | Cocktail | Satisfaction Rating | Size class (in regards to species) | Habitat Type | Environmental factors | Trial or Observation? | Last Updated | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Acacia mearnsii | Fabaceae | black wattle | KMWP | IPA-Incision Point Application | 100% Milestone | more than moderate satisfaction | MESIC | TRIAL | 2020-03-10 | |||
| Acacia mearnsii | Fabaceae | black wattle | OANRP | cut-stump | 20% G4, 80% Biodiesel | successful. Recommended method | MESIC | OBSERVED | 2020-03-10 | |||
| Acacia mearnsii | Fabaceae | black wattle | OANRP | girdle | 20% G4, 80% Biodiesel | successful. Recommended method | MESIC | OBSERVED | 2020-03-10 | |||
| Acacia mearnsii | Fabaceae | black wattle | OANRP | hand-pull | n/a | successful. Recommended method | less than 2m | MESIC | OBSERVED | 2018-04-24 | + | |
| Acacia mearnsii | Fabaceae | black wattle | KMWP | IPA-Incision Point Application | 100% Triclopyr | successful. Recommended method | tree DBH 20-35 cm | MESIC | TRIAL | 2015-10-07 | ||
| Acacia mearnsii | Fabaceae | black wattle | KMWP | IPA-Incision Point Application | 100% Glyphosate | moderate satisfaction | success with smaller diameter trees. less than 20 cm | MESIC | TRIAL | 2015-10-07 | ||
| Acacia mearnsii | Fabaceae | black wattle | KMWP | IPA-Incision Point Application | 100% Polaris | unsatisfactory results | MESIC | TRIAL | 2015-10-07 | |||
| Acacia confusa | Fabaceae | Formosan koa | OANRP | girdle | 20% G4, 80% Biodiesel | successful. Recommended method | OBSERVED | 2020-03-10 | ||||
| Acacia confusa | Fabaceae | Formosan koa | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris | unsatisfactory results | trunk circumference 38-94.5cm | MESIC | TRIAL | 2018-04-24 | + | |
| Acacia confusa | Fabaceae | Formosan koa | CTAHR/OANRP | IPA-Incision Point Application | 100% Milestone | minimal satisfaction | trunk circumference 38-94.5cm | MESIC | TRIAL | 2018-04-23 | + | |
| Acacia confusa | Fabaceae | Formosan koa | CTAHR/OANRP | IPA-Incision Point Application | 100% Ranger Pro | unsatisfactory results | trunk circumference 38-94.5cm | MESIC | TRIAL | 2018-04-23 | + | |
| Acacia confusa | Fabaceae | Formosan koa | CTAHR/OANRP | IPA-Incision Point Application | 100% Garlon 4 Ultra | unsatisfactory results | trunk circumference 38-94.5cm | MESIC | TRIAL | 2018-04-23 | + | |
| Acacia confusa | Fabaceae | Formosan koa | CTAHR/OANRP | IPA-Incision Point Application | 100% Mat 28 | successful. Recommended method | trunk circumference 38-94.5cm | MESIC | TRIAL | 2018-04-23 | + | |
| Acacia confusa | Fabaceae | Formosan koa | OANRP | cut-stump | 20% G4, 80% Biodiesel | successful. Recommended method | OBSERVED | 2015-03-11 | ||||
| Acacia farnesiana | Fabaceae | Klu | OANRP | cut-stump | 40% G4, 60% Biodiesel | successful. Recommended method | OBSERVED | 2015-03-11 | + | |||
| Acacia farnesiana | Fabaceae | Klu | OANRP | girdle | 40% G4, 60% Biodiesel | successful. Recommended method | OBSERVED | 2015-03-11 | ||||
| Acacia mangium | Fabaceae | mangium wattle | OANRP | cut-stump | 20% G4, 80% Biodiesel | successful. Recommended method | OBSERVED | 2015-03-11 | ||||
| Acacia mangium | Fabaceae | mangium wattle | OANRP | girdle | 20% G4, 80% Biodiesel | successful. Recommended method | OBSERVED | 2015-03-04 | ||||
| Agave sisalana | Asparagaceae | Sisal | 2015-03-04 | |||||||||
| Ageratina riparia | Asteraceae | Hamakua pamakani | OANRP | clip and drip | 20% G4, 80% Biodiesel | successful. Recommended method | MESIC | OBSERVED | 2015-03-04 | |||
| Ageratina riparia | Asteraceae | Hamakua pamakani | OANRP | basal-bark | 20% G4, 80% Biodiesel | successful. Recommended method | OBSERVED | 2015-03-04 | ||||
| Ageratina riparia | Asteraceae | Hamakua pamakani | OANRP | foliar | 1% Round-up, 99% water | successful. Recommended method | MESIC | OBSERVED | 2015-03-04 | |||
| Ageratina adenophora | Asteraceae | Maui pamakani | OANRP | cut | 20% G4, 80% Biodiesel | successful. Recommended method | MESIC | OBSERVED | 2015-03-04 | + | ||
| Ageratina adenophora | Asteraceae | Maui pamakani | OANRP | basal-bark | 20% G4, 80% Biodiesel | successful. Recommended method | OBSERVED | 2015-03-04 | ||||
| Aleurites moluccana | Euphorbiaceae | Euphorbiaceae | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris | successful. Recommended method | trunk circumference 61-104cm | MESIC | TRIAL | 2018-04-24 | + | |
| Aleurites moluccana | Euphorbiaceae | Euphorbiaceae | CTAHR/OANRP | IPA-Incision Point Application | 100% Milestone | more than moderate satisfaction | trunk circumference 61-104cm | MESIC | TRIAL | 2018-04-23 | + | |
| Aleurites moluccana | Euphorbiaceae | Euphorbiaceae | CTAHR/OANRP | IPA-Incision Point Application | 100% Ranger Pro | minimal satisfaction | trunk circumference 61-104cm | MESIC | TRIAL | 2018-04-23 | + | |
| Aleurites moluccana | Euphorbiaceae | Euphorbiaceae | CTAHR/OANRP | IPA-Incision Point Application | 100% Garlon 4 Ultra | unsatisfactory results | trunk circumference 61-104cm | MESIC | TRIAL | 2018-04-23 | + | |
| Aleurites moluccana | Euphorbiaceae | Kukui | NEPM | girdle | 25% G4, 75% MSO | unsatisfactory results | large trees | MESIC | OBSERVED | 2018-10-17 | + | |
| Aleurites moluccana | Euphorbiaceae | Kukui | OANRP | cut-stump | 20% G4, 80% Biodiesel | successful. Recommended method | OBSERVED | 2015-03-04 | + | |||
| Aleurites moluccana | Euphorbiaceae | Kukui | OANRP | girdle | 20% G4, 80% Biodiesel | successful. Recommended method | OBSERVED | 2015-03-04 | + | |||
| Aleurites moluccana | Euphorbiaceae | Kukui | NEPM | girdle | 25% G4, 1%milestone, 74% MSO | moderate satisfaction | large trees | MESIC | OBSERVED | 2018-10-17 | + | |
| Angiopteris evecta | Marattiaceae | Mule's foot fern | KMWP | IPA-Incision Point Application | 100% Polaris | more than moderate satisfaction | medium - large | WET | TRIAL | 2018-01-29 | + | |
| Angiopteris evecta | Marattiaceae | Mule's foot fern | NEPM | IPA-Incision Point Application | 100% IMZ | successful. Recommended method | sm-lrg (xlrg still working on application rate) | WET | TRIAL | 2015-02-26 | + | |
| Angiopteris evecta | Marattiaceae | Mule's foot fern | NEPM | foliar | 2% IMZ (Habitat) | more than moderate satisfaction | all | WET | OBSERVED | 2015-02-26 | + | |
| Angiopteris evecta | Marattiaceae | Mule's foot fern | KMWP | IPA-Incision Point Application | 100% Polaris | moderate satisfaction | large | WET | TRIAL | 2015-02-23 | + | |
| Angiopteris evecta | Marattiaceae | Mule's foot fern | KMWP | IPA-Incision Point Application | 100% Milestone | minimal satisfaction | large | WET | TRIAL | 2015-02-23 | + | |
| Angiopteris evecta | Marattiaceae | Mule's foot fern | OANRP | foliar | 10% G4 in water | more than moderate satisfaction | MESIC | OBSERVED | 2015-02-23 | + | ||
| Angiopteris evecta | Marattiaceae | Mule's foot fern | OANRP | cut-stump | G4 20%, 80% Biodiesel | more than moderate satisfaction | WET | OBSERVED | + | |||
| Araucaria columnaris | Araucariaceae | Cook pine | OANRP | girdle | G4 20%, 80% Biodiesel | moderate satisfaction | large trees | OBSERVED | 2018-04-24 | + | ||
| Araucaria columnaris | Araucariaceae | Cook pine | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris | moderate satisfaction | trunk circumference 47-207cm | MESIC | TRIAL | 2018-04-24 | + | |
| Araucaria columnaris | Araucariaceae | Cook pine | CTAHR/OANRP | IPA-Incision Point Application | 100% Milestone | moderate satisfaction | trunk circumference 47-207cm | MESIC | TRIAL | 2018-04-23 | + | |
| Araucaria columnaris | Araucariaceae | Cook pine | CTAHR/OANRP | IPA-Incision Point Application | 100% Ranger Pro | minimal satisfaction | trunk circumference 47-207cm | MESIC | TRIAL | 2018-04-23 | + | |
| Araucaria columnaris | Araucariaceae | Cook pine | CTAHR/OANRP | IPA-Incision Point Application | 100% Garlon 4 Ultra | unsatisfactory results | trunk circumference 47-207cm | MESIC | TRIAL | 2018-04-23 | + | |
| Araucaria columnaris | Araucariaceae | Cook pine | CTAHR/OANRP/ NEPM | IPA-Incision Point Application | 100% IMZ | moderate satisfaction | 2015-03-20 | + | ||||
| Araucaria columnaris | Araucariaceae | Cook pine | CTAHR/OANRP/ NEPM | IPA-Incision Point Application | 100% GLY | minimal satisfaction | 2015-03-20 | + | ||||
| Araucaria columnaris | Araucariaceae | Cook pine | CTAHR/OANRP/ NEPM | IPA-Incision Point Application | 100% AMP | successful. Recommended method | MESIC | 2015-03-20 | + | |||
| Araucaria columnaris | Araucariaceae | Cook pine | OANRP | hand-pull | none | successful. Recommended method | seedlings | MESIC | OBSERVED | 2015-02-23 | ||
| Araucaria columnaris | Araucariaceae | Cook pine | NEPM | IPA-Incision Point Application | Milestone 100% | more than moderate satisfaction | small approx < 6 in DBH | OBSERVED | + | |||
| Araucaria columnaris | Araucariaceae | Cook pine | OANRP | cut | none | successful. Recommended method | seedlings | MESIC | OBSERVED | |||
| Ardisia elliptica | Myrsinaceae | Inkberry | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris (imazapyr) | successful. Recommended method | trunk circumference 15-19cm | MESIC | TRIAL | 2018-04-24 | + | |
| Ardisia elliptica | Myrsinaceae | Inkberry | CTAHR/OANRP | IPA-Incision Point Application | 100% Milestone (aminopyralid) | unsatisfactory results | trunk circumference 15-19cm | MESIC | TRIAL | 2018-04-23 | + | |
| Ardisia elliptica | Myrsinaceae | Inkberry | CTAHR/OANRP | IPA-Incision Point Application | 100% Ranger Pro (glyphosate) | unsatisfactory results | trunk circumference 15-19cm | MESIC | TRIAL | 2018-04-23 | + | |
| Ardisia elliptica | Myrsinaceae | Inkberry | CTAHR/OANRP | IPA-Incision Point Application | 100% Garlon 4 (triclopyr) | unsatisfactory results | trunk circumference 15-19cm | MESIC | TRIAL | 2018-04-23 | + | |
| Ardisia elliptica | Myrsinaceae | Inkberry | KMWP | foliar | 2% Polaris and water | small and new growth from burned plants | MESIC | TRIAL | 2016-02-23 | + | ||
| Ardisia crenata | Myrsinaceae | Inkberry | Ohulehule Conservancy | IPA-Incision Point Application | Round up. %? | successful. Recommended method | 2015-03-23 | |||||
| Ardisia elliptica | Myrsinaceae | Inkberry | OANRP | foliar | Round Up. 1% and 3% | more than moderate satisfaction | MESIC | OBSERVED | 2015-02-23 | + | ||
| Ardisia elliptica | Myrsinaceae | Inkberry | OANRP | clip and drip | G4 20%, 80% Biodiesel | more than moderate satisfaction | MESIC | OBSERVED | ||||
| Ardisia elliptica | Myrsinaceae | Inkberry | OANRP | foliar | 3% and 5% Garlon4 in water | more than moderate satisfaction | MESIC | OBSERVED | + | |||
| Ardisia crenata | Myrsinaceae | Inkberry | ||||||||||
| Arthrostemma ciliatum | Melastomataceae | Arthrostemma | OANRP | foliar | 2% Round-up, 98% water | more than moderate satisfaction | MESIC | OBSERVED | 2015-07-11 | + | ||
| Atriplex semibaccata | Amaranthaceae | salt bush | NEPM | hand-pull | none | successful. Recommended method | DRY | + | ||||
| Atriplex semibaccata | Amaranthaceae | salt bush | OANRP | hand-pull | none | successful. Recommended method | DRY | OBSERVED | + | |||
| Axonopus fissifolius | Poaceae | narrow-leaved carpet grass | OANRP | foliar | 1% RangerPro in water | successful. Recommended method | WET | TRIAL | 2019-10-02 | + | ||
| Axonopus fissifolius | Poaceae | narrow-leaved carpet grass | OANRP | foliar | 0.5% RangerPro in water | successful. Recommended method | WET | TRIAL | 2019-10-02 | + | ||
| Axonopus fissifolius | Poaceae | narrow-leaved carpet grass | OANRP | foliar | 0.6% Fusilade DX + 0.4% NuFilm in water | successful. Recommended method | WET | TRIAL | 2019-10-02 | + | ||
| Azadirachta indica | Meliaceae | neem | Kualoa Ranch | girdle | 20% G4, 80% Crop Oil | successful. Recommended method | MESIC | OBSERVED | 2016-12-05 | |||
| Begonia spp. | Begoniaceae | |||||||||||
| Blechnum appendiculatum | Blechnaceae | Blechnum | NEPM | foliar | 3% Polaris, 97% water | moderate satisfaction | MESIC | OBSERVED | 2016-10-31 | + | ||
| Blechnum appendiculatum | Blechnaceae | Blechnum | NEPM | foliar | 5% Polaris, 95% water | successful. Recommended method | MESIC | TRIAL | 2015-02-26 | + | ||
| Blechnum appendiculatum | Blechnaceae | Blechnum | OANRP | clip and drip | 20% G4, 80% Biodiesel | moderate satisfaction | MESIC | OBSERVED | + | |||
| Blechnum appendiculatum | Blechnaceae | Blechnum | OANRP | hand-pull | moderate satisfaction | MESIC | OBSERVED | + | ||||
| Blechnum appendiculatum | Blechnaceae | Blechnum | OANRP | foliar | 5% G4, 95% water | moderate satisfaction | MESIC | TRIAL | + | |||
| Blechnum appendiculatum | Blechnaceae | palm fern | OANRP | foliar | Garlon 4 (10% dilution in crop oil) | more than moderate satisfaction | MESIC | TRIAL | 2018-03-21 | + | ||
| Blechnum appendiculatum | Blechnaceae | palm fern | OANRP | foliar | Ranger Pro (2% dilution in water) | more than moderate satisfaction | MESIC | TRIAL | 2018-03-21 | + | ||
| Blechnum appendiculatum | Blechnaceae | palm fern | OANRP | foliar | Polaris (2% dilution in water) | more than moderate satisfaction | MESIC | TRIAL | 2018-03-21 | + | ||
| Buddleja davidii | Buddliaceae | butterfly bush | 2015-05-07 | |||||||||
| Buddleja asiatica | Buddliaceae | Dog tail | NEPM | clip and drip | 25% G4, 75% FCO | more than moderate satisfaction | 2018-03-21 | |||||
| Buddleja asiatica | Buddliaceae | dog tail | NEPM | basal-bark | 25% G4, 75% FCO | more than moderate satisfaction | 2018-03-21 | |||||
| Buddleja asiatica | Buddliaceae | dog tail | OANRP | cut-stump | 20% G4, 80% Biodiesel | more than moderate satisfaction | OBSERVED | 2018-03-21 | ||||
| Buddleja asiatica | Buddliaceae | dog tail | OANRP | basal-bark | 20% G4, 80% Biodiesel | more than moderate satisfaction | OBSERVED | 2015-05-07 | ||||
| Buddleja madagascariensis | Buddliaceae | Smoke bush | OANRP | cut-stump | 20% G4, 80% Biodiesel | successful. Recommended method | OBSERVED | 2015-05-07 | ||||
| Caesalpina decapetala | Fabaceae | Catsclaw | ||||||||||
| Callitris columellaris | Cupressaceae | Murray river cypress-pine | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris (imazapyr) | unsatisfactory results | trunk circumference 56-113cm | MESIC | TRIAL | 2018-04-24 | + | |
| Callitris columellaris | Cupressaceae | Murray river cypress-pine | CTAHR/OANRP | IPA-Incision Point Application | 100% Milestone (aminopyralid) | more than moderate satisfaction | trunk circumference 56-113cm | MESIC | TRIAL | 2018-04-23 | + | |
| Callitris columellaris | Cupressaceae | Murray river cypress-pine | CTAHR/OANRP | IPA-Incision Point Application | 100% Ranger Pro (glyphosate) | moderate satisfaction | trunk circumference 56-113cm | MESIC | TRIAL | 2018-04-23 | + | |
| Callitris columellaris | Cupressaceae | Murray river cypress-pine | CTAHR/OANRP | IPA-Incision Point Application | 100% Garlon 4 (triclopyr) | unsatisfactory results | trunk circumference 56-113cm | MESIC | TRIAL | 2018-04-23 | + | |
| Casuarina equisetifolia | Casuarinaceae | Iron wood | OANRP | girdle | 20% G4, 80% Biodiesel | successful. Recommended method | buttress roots and stand alone trees | OBSERVED | 2018-04-24 | |||
| Casuarina glauca | Casuarinaceae | iron wood | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris (imazapyr) | minimal satisfaction | trunk circumference 51-95cm | MESIC | TRIAL | 2018-04-24 | + | |
| Casuarina glauca | Casuarinaceae | iron wood | CTAHR/OANRP | IPA-Incision Point Application | 100% Milestone (aminopyralid) | minimal satisfaction | trunk circumference 51-95cm | MESIC | TRIAL | 2018-04-23 | + | |
| Casuarina glauca | Casuarinaceae | iron wood | CTAHR/OANRP | IPA-Incision Point Application | 100% Ranger Pro (glyphosate) | minimal satisfaction | trunk circumference 51-95cm | MESIC | TRIAL | 2018-04-23 | + | |
| Casuarina glauca | Casuarinaceae | iron wood | CTAHR/OANRP | IPA-Incision Point Application | 100% Garlon 4 (triclopyr) | moderate satisfaction | trunk circumference 51-95cm | MESIC | TRIAL | 2018-04-23 | + | |
| Casuarina glauca | Casuarinaceae | iron wood | OANRP | girdle | 20% G4, 80% Biodiesel | successful. Recommended method | OBSERVED | 2018-03-21 | + | |||
| Cecropia obtusifolia | Urticaceae | Trumpet tree | KMWP | IPA-Incision Point Application | 100% Polaris | successful. Recommended method | MESIC | OBSERVED | ||||
| Cenchrus ciliarus | Poaceae | buffel grass | ||||||||||
| Cenchrus setaceus | Poaceae | Fountain grass | OISC | foliar | 2% Round-up, 98% water | successful. Recommended method | apply when grass is green | DRY | OBSERVED | 2018-04-24 | + | |
| Cenchrus setaceus | Poaceae | Fountain grass | OISC | foliar | 1.5% Round Up Pro Max, 98% Water, 0.5% Turf trax | successful. Recommended method | apply when grass is green | 2018-02-05 | + | |||
| Cenchrus setaceus | Poaceae | Fountain grass | BINARS | foliar | 2% Round-up, 0.5-1% IMZ, 1-3% ammonium sulfate | more than moderate satisfaction | DRY | OBSERVED | 2015-03-05 | + | ||
| Cenchrus setaceus | Poaceae | Fountain grass | BINARS | aerial boom spray | 2% Round-up, 0.5-1% IMZ, 1-3% ammonium sulfate | minimal satisfaction | DRY | OBSERVED | 2015-03-05 | + | ||
| Cenchrus setaceus | Poaceae | Fountain grass | OANRP | aerial ball sprayer | 2% Round-up, 98% water | successful. Recommended method | apply when grass is green | DRY | OBSERVED | 2015-02-23 | + |
Kept by UHELP. Ratings and notes are the reporting organisation’s own. For herbicides, always follow the product label — the label is the law.