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.

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403rows

88species, each with its own page

15organisations reporting

9active ingredients

Oct 2026last updated

By active ingredient

Triclopyr

Group 4

Synthetic 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 9

EPSP 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 2

ALS 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 4

Synthetic auxin · no aquatic-labelled products

57 reports29 species3.3 / 5 average

Best on Cryptomeria japonica, Delairea odorata, Leucaena leucocephala, Morella faya

Sulfometuron-methyl

Group 2

ALS inhibitor · no aquatic-labelled products

6 reports2 species4.5 / 5 average

Best on Pterolepis glomerata, Chromolaena odorata

Fluazifop-P-butyl

Group 1

ACCase inhibitor · no aquatic-labelled products

5 reports3 species4.4 / 5 average

Best on Axonopus fissifolius, Paspalum conjugatum, Melinis minutiflora

Aminocyclopyrachlor

Group 4

Synthetic auxin · no aquatic-labelled products

4 reports4 species3.8 / 5 average

Best on Acacia confusa, Toona ciliata, Leucaena leucocephala, Corymbia citriodora

Metsulfuron-methyl

Group 2

ALS inhibitor · no aquatic-labelled products

1 report1 species4.0 / 5 average

Best on Hedychium gardnerianum

Clopyralid

Group 4

Synthetic auxin · no aquatic-labelled products

1 report0 species5.0 / 5 average

8 of 403

Species	Family	Common Name(s)	Organization	Control Technique	Cocktail	Satisfaction Rating	Habitat Type	Trial or Observation?	Last Updated
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	+

Kept by UHELP. Ratings and notes are the reporting organisation’s own. For herbicides, always follow the product label — the label is the law.