Asulan DC is a selective herbicide used to control docks and bracken. Asulan is selective to clover, ryegrass and tall fescue.
Active Ingredient:
365g/litre Asulam SL
Primarily targets:
– Docks (Rumex spp.)
– Bracken fern.
Safe (generally) on:
– Ryegrass
– Clover (with some temporary yellowing possible).
Main uses.
1. Dock control (pasture & crops).
– Best in spring when docks are in full leaf(Works on established plants).
2. Bracken control (forestry & land development).
– Used for Long-term control, Releasing young radiata pine.
Application rates.
– Boom spraying (docks) 3.3 – 4.4 L/ha Use higher rate for heavy infestations.
– Spot spraying 460 mL per 100 L water. Spray to runoff.
– Bracken (forestry).
Ground: 12 L/ha + organosilicone penetrant.
Aerial: 15.3 L/ha + penetrant
Water rates.
– Around 200 L/ha for boom spraying.
Key timing rules(VERY important).
DO spray:
– When weeds are actively growing.
– When docks are in full leaf.
– Bracken when fronds fully expanded.
DO NOT spray:
– During drought.
– If rain expected within 12 hours.
– Immediately after grazing.
– After docks start seeding.
– Onto crop foliage (e.g. kiwifruit, berries).
Pasture rule:
– Wait 2–3 weeks after grazing before spraying.
Mixing notes.
– Half-fill tank → add product → top up → mix well(Do NOT add surfactant for dock control.)
– For bracken only → add organosilicone penetrant.
Plant safety.
May cause Temporary yellowing of pasture Usually recovers quickly under good growth conditions.
Safety & hazardsCauses:
– Skin irritation.
– Serious eye irritation.
– Possible reproductive risk.
Environmental risks:
– Harmful to aquatic life.
– Harmful to soil organisms.
Critical:
– Avoid spray drift.
– Keep out of waterways.
Grazing & crop notes.
– Don’t spray immediately after grazingAllow pasture recovery before application.
Avoid use on:
– Grass seed crops.
– White clover (sensitive).
– Bracken-specific insights No immediate visible effect Full results seen next spring.
– Wait ≥4 weeks before disturbing treated area.
Practical summary (farmer-friendly).
– Best use: Dock control in pasture.
– Timing is everything: full leaf, active growth.
– Be patient: especially with bracken.Don’t rush after grazing.
– Watch waterways + drift.
Caution:
Use strictly according to label directions.
Available in 10L
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Registered under the ACVM Act: P009148
