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Active ingredientGroup 2Imidazolinone
Imazapyr
ALS inhibitor
Long soil residual; non-target injury via root uptake is a real risk near desirable plants.
31 species
Species it’s been reported on
- Angiopteris evectaking fern4 rows · best 5.0/5
- Melaleuca quinquenerviaBroad-leaved paperbark4 rows · best 5.0/5
- Blechnum appendiculatumpalm fern3 rows · best 5.0/5
- Leptospermum scopariumMānuka3 rows · best 5.0/5
- Ardisia ellipticashoebutton Ardisia2 rows · best 5.0/5
- Cecropia obtusifoliablunt-leaved trumpet tree1 row · best 5.0/5
- Coffea arabicaCoffee1 row · best 5.0/5
- Grevillea robustasilk oak1 row · best 5.0/5
- Pimenta dioicaAllspice1 row · best 5.0/5
- Schinus terebinthifoliusChristmas berry1 row · best 5.0/5
- Sphaeropteris cooperiScaly Tree Fern1 row · best 5.0/5
- Sphagneticola trilobataTrailing Daisy1 row · best 5.0/5
- Toona ciliataAustralian Red Cedar1 row · best 5.0/5
- Cenchrus setaceusFountain Grass2 rows · best 4.0/5
- Citharexylum caudatumFiddlewood2 rows · best 4.0/5
- Fraxinus uhdeiShamel Ash1 row · best 4.0/5
- Morella fayafiretree1 row · best 4.0/5
- Psidium guajavaCommon guava1 row · best 4.0/5
- Araucaria columnarisCook pine2 rows · best 3.0/5
- Chrysophyllum oliviformeSatinleaf1 row · best 3.0/5
- Cryptomeria japonicasugi1 row · best 3.0/5
- Spathodea campanulataAfrican tulip tree1 row · best 3.0/5
- Psidium cattleianumwaiawī2 rows · best 2.0/5
- Syzygium cuminiJava plum2 rows · best 2.0/5
and 7 more in the data.
In the data
Weed Control by Species
| Genus | Species | Family | Common Name(s) | Organization | Control Technique | Cocktail | Satisfaction Rating | Additional treatment notes | 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% Polaris | 1-unsatisfactory results | MESIC | TRIAL | 2015-10-07 | |||
| Acacia | confusa | Fabaceae | Formosan koa | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris | 1-unsatisfactory results | Trial complete, 30 months. 4 cuts/tree, 0.5ml/cut. At 30 months, no trees dead. Not effective. Not recommended. | trunk circumference 38-94.5cm | MESIC | TRIAL | 2018-04-24 | |
| Aleurites | moluccana | Euphorbiaceae | Euphorbiaceae | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris | 5-successful. Recommended method | Trial complete, 30 months. 4 cuts/tree, 0.5ml/cut. At 6 months, major defoliation. At 10 months, 2 of 5 trees dead (circum < 81cm). At 30 months, 5 of 5 trees dead. Suggest 1 cut/15-20cm. | trunk circumference 61-104cm | MESIC | TRIAL | 2018-04-24 | |
| Angiopteris | evecta | Marattiaceae | Mule's foot fern | KMWP | IPA-Incision Point Application | 100% Polaris | 4-more than moderate satisfaction | Trial was done on large size classses >0.1m3. Results show death at 20ml of Polaris/Polaris AC with incisions around the whole brain. | medium - large | WET | TRIAL | 2018-01-29 | |
| Angiopteris | evecta | Marattiaceae | Mule's foot fern | NEPM | IPA-Incision Point Application | 100% IMZ | 5-successful. Recommended method | apply to top of brain and/or new crozier, 10-15 ml depending on size, works on small to large but XXL may not be as effective. Trialing additional dose rates w KMWP | 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) | 4-more than moderate satisfaction | Aerial spray. Good for inaccessible areas, has non-target impacts and dense stands need to be retreated | all | WET | OBSERVED | 2015-02-26 | |
| Angiopteris | evecta | Marattiaceae | Mule's foot fern | KMWP | IPA-Incision Point Application | 100% Polaris | 3-moderate satisfaction | plant is rotted at meristem but some new growth | large | WET | TRIAL | 2015-02-23 | |
| Araucaria | columnaris | Araucariaceae | Cook pine | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris | 3-moderate satisfaction | Trial complete, 31 months. 4 cuts/tree, 0.5ml/cut. At 21 months, 2 of 5 trees dead (circum < 74cm). At 31 months, remaining 3 starting to recover. Suggest 1 cut/10-15cm. | trunk circumference 47-207cm | MESIC | TRIAL | 2018-04-24 | |
| Araucaria | columnaris | Araucariaceae | Cook pine | CTAHR/OANRP/ NEPM | IPA-Incision Point Application | 100% IMZ | 3-moderate satisfaction | double notch 4 points, .5ml/notch = 4ml effective with smaller size classes (< 20 cm circumference) may just need to up the dose for effective kill on larger trees | 2015-03-20 | ||||
| Ardisia | elliptica | Myrsinaceae | Inkberry | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris (imazapyr) | 5-successful. Recommended method | Trial complete, 26 months. 1 cut/tree, 0.5ml/cut. At Tested 1 cut/15-20cm circum. At 6 months, 1 of 5 trees dead, rest had major defoliation. At 15 months, 5 of 5 dead. At 26 months, all trees fallen and decomposing. Suggest 1 cut/20cm. | trunk circumference 15-19cm | MESIC | TRIAL | 2018-04-24 | |
| Ardisia | elliptica | Myrsinaceae | Inkberry | KMWP | foliar | 2% Polaris and water | Trial in progress, awaiting results | small and new growth from burned plants | MESIC | TRIAL | 2016-02-23 | ||
| Blechnum | appendiculatum | Blechnaceae | Blechnum | NEPM | foliar | 3% Polaris, 97% water | 3-moderate satisfaction | Didn't completely kill, but did reduce population size, may not have been good coverage | MESIC | OBSERVED | 2016-10-31 | ||
| Blechnum | appendiculatum | Blechnaceae | Blechnum | NEPM | foliar | 5% Polaris, 95% water | 5-successful. Recommended method | need to look into trying a lower dosage - also spiked with milestone (1%) had similar results although milestone spike plot seemed to kill outside of the treated plot | MESIC | TRIAL | 2015-02-26 | ||
| Blechnum | appendiculatum | Blechnaceae | palm fern | OANRP | foliar | Polaris (2% dilution in water) | 4-more than moderate satisfaction | Trial with replicates and control plots conducted. 148ml spray mix applied to 1 sq. m BleApp. Plots were monitored for 13 months post-tx. Vegetative cover estimated at 1, 2, 6 and 13 months. Results: Co-occuring plants in the plot generally died under all treatments. Size of BleApp patch did not have effect on efficacy of treatment. Results: Vegetative cover steadily declined over the entire 13 months, eventually reaching 0 cover. Slow action. Some translocation seen outside plot (up to 40cm) | MESIC | TRIAL | 2018-03-21 | ||
| Callitris | columellaris | Cupressaceae | Murray river cypress-pine | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris (imazapyr) | 1-unsatisfactory results | Trial complete, 27 months. 5cuts/tree, 0.5mL/cut. At 27 months, no trees dead. Ineffective. | trunk circumference 56-113cm | MESIC | TRIAL | 2018-04-24 | |
| Casuarina | glauca | Casuarinaceae | iron wood | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris (imazapyr) | 2-minimal satisfaction | Trial complete, 27 months. 5 cuts/tree, 0.5ml/cut. At 27 months, 1 of 5 trees dead, others recovering. Inconsistent results. Not recommended. | trunk circumference 51-95cm | MESIC | TRIAL | 2018-04-24 | |
| Cecropia | obtusifolia | Urticaceae | Trumpet tree | KMWP | IPA-Incision Point Application | 100% Polaris | 5-successful. Recommended method | MESIC | OBSERVED | ||||
| Cenchrus | setaceus | Poaceae | Fountain grass | BINARS | foliar | 2% Round-up, 0.5-1% IMZ, 1-3% ammonium sulfate | 4-more than moderate satisfaction | Used in Manuka NAR with Solo backpack sprayer, 100 gl Pac-Tank with high success. and doing arial boom trials since 10/2013 | 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 | 2-minimal satisfaction | Been doing trials since 10/2013. Mix worked well in ground applications, but not so well for boom spraying. | DRY | OBSERVED | 2015-03-05 | ||
| Chrysophyllum | oliviforme | Sapotaceae | Satinleaf | CTAHR/OANRP/ Waimea | IPA-Incision Point Application | 100% Polaris | 3-moderate satisfaction | TRIAL INCOMPLETE. Difficult to see canopy of test trees. Abandoned trial after 6 months. No trees died within that time. 2 cuts/tree, 0.5ml/cut. Major defoliation seen on all trees. | Trunk circumference 32-71cm | MESIC | TRIAL | 2018-04-23 | |
| Cinnamomum | burmanii | Lauraceae | Padang cassia | CTAHR | IPA-Incision Point Application | 100% IMZ | |||||||
| Citharexylum | caudatum | Verbenaceae | fiddlewood | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris (imazapyr) | 2-minimal satisfaction | Trial 1 complete, 11 months. 2 cuts/tree, 0.5ml/cut. At 11 months, 2 of 5 trees with major defoliation. No trees died. May be effective at higher rates. | trunk circumference 32-75cm | MESIC | TRIAL | 2018-04-24 | |
| Citharexylum | caudatum | Verbenaceae | fiddlewood | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris (imazapyr) | 4-more than moderate satisfaction | Trial 2 complete, 25 months. 4 cuts/tree, 0.5ml/cut. At 6 months, 1 of 5 trees dead (circum = 45cm). At 25 months, 2 of 5 dead (circum = 45cm and 29.5cm), 2 very poor (little trunk buds, likely will die), 1 recovering. Very slow! Suggest 1 cut/10cm. | trunk circumference 25-47cm | MESIC | TRIAL | 2018-04-24 | |
| Coffea | arabica | Rubiaceae | common coffee | CTAHR/OANRP | IPA-Incision Point Application | 100% Polaris (imazapyr) | 5-successful. Recommended method | Trial complete, 31 months. 1 cut/tree, 0.5ml/cut. At 7 months, 3 of 5 trees fully defoliated, remaining 2 mostly defoliated. At 21 months 4 of 5 dead. At 31 months, 5 of 5 dead. Suggest 1 cut/15cm | trunk circumference 17-34cm | MESIC | TRIAL | 2018-04-24 | |
| Cordia | alliodora | Boraginaceae | manjack | CTAHR/OANRP/ Waimea | IPA-Incision Point Application | 100% Polaris (imazapyr) | 2-minimal satisfaction | Trial complete, 22 months. 6 cuts/tree, 0.5ml/cut. At 22 months, 1 of 5 trees dead, major defoliation on all others. Trial needs to be repeated. | trunk circumference 58-169cm | MESIC | TRIAL | 2018-04-24 |
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Results reported here are field experience, not recommendations. Always read and follow the product label, and check that a product is labelled for the site — especially near water.