invasiveAsteraceae

Chromolaena odorata

devil weed

Invasive (non-native)non-native

Introduced and causing ecological or economic harm.

Extremely fast-growing shrub; OISC priority target on Oʻahu. Forms impenetrable thickets, highly flammable, and produces wind-dispersed seed in enormous quantities.

Chromolaena odorata is a tropical and subtropical species of flowering shrub in the sunflower family. It is native to the Americas, from Florida and Texas in the United States south through Mexico and the Caribbean to South America. It has been introduced to tropical Asia, west Africa, and parts of Australia. Common names include Siam weed, Christmas bush, devil weed, camfhur grass, common floss flower and triffid.

Controlling Chromolaena odorata

From Weed Control by Species6 rows →

Best reported: aerial ball sprayer with 2% RangerPro, Oust or Sulfomet, 98% water — one report from OANRP.

5.0aerial ball sprayer2% RangerPro, Oust or Sulfomet, 98% waterGlyphosateG9 Sulfometuron-methylG21 report · 1 observed
OANRP
- 5successful. Recommended method · OANRP · observed · 2018-04-24
  Aerial ball sprayer set-ups vary, and can affect efficacy. Quantity of Oust/Sulfomet needs to be calculated based on area sprayed, see label. For spot sprays, mix 1 gram per gallon.
  Size: all age classesHabitat: mesicNear water — check the label: not every product with this ingredient is labelled for aquatic sites
5.0cut-stump20% G4U, 79.5% Crop oil 0.5%Turf traxTriclopyrG41 report
OISC
- 5successful. Recommended method · OISC · 2018-02-05
5.0foliar2% Round-up, Oust or Sulfomet, 98% waterGlyphosateG9 Sulfometuron-methylG21 report · 1 observed
OANRP
- 5successful. Recommended method · OANRP · observed · 2015-03-04
  Used both power sprayer and backpack sprayer. Power sprayer more effective, as has better penetration with preemergent (Oust, Sulfomet), but backpack sprayer adequate. Quantity of Oust/Sulfomet needs to be calculated based on area sprayed, see label. For spot sprays, mix 1 gram per gallon.
  Size: all age classesHabitat: mesicNear water — check the label: not every product with this ingredient is labelled for aquatic sites
5.0hand-pullnone1 report
OISC
- 5successful. Recommended method · OISC · 2018-03-21
  When plant is too big to hand-pull, use cut-stump method or foliar method.
4.0foliar0.16% (5g) Oust XP, 1.5% Round Up Pro Max, 97.84% Water, 0.5% Turf traxGlyphosateG9 Sulfometuron-methylG21 report
OISC
- 4more than moderate satisfaction · OISC · 2018-02-05
  For use on dense hotspots, applied on the ground with backpak sprayers, power sprayers. applied aerially with spray ball.
  Size: all age classesNear water — check the label: not every product with this ingredient is labelled for aquatic sites
2.0basal-bark20% G4, 80% Crop oilTriclopyrG41 report
OISC
- 2minimal satisfaction · OISC · 2018-02-05
  Does not work as well as handpulling

Ratings are the reporting organisation’s own, on a 5-point scale. Always follow the product label — the label is the law. See these 6 rows in the full table

Gallery · 8 · iNaturalist