Fennel Control Guide
Do's and Don'ts of fennel control
- Plan your control program, this will save time and money in the long-run;
- Consider the impact of your control methods on off-target species, especially if herbicides are used;
- Ensure machinery and equipment is washed down between sites or prior to contractors leaving site;
in early - For new infestations, eradicate before the plants reach the
flowering stage: once plants begin seeding, control becomes more
difficult and expensive;
- Carefully time your use of herbicide for best results (see
Herbicides for Fennel Control for more information);
- Coordinate your control program with neighbouring landholders where your weed problem crosses property boundaries;
- Revisit and regularly inspect the site and ensure follow-up is undertaken;
- Use a combination of different control methods; and
- Establish vigorous pasture (or native species) after removal to reduce re-infestation.
- Don't introduce fennel to fennel-free areas (e.g. by failing to wash down machinery and equipment between sites);
- Don't start your control program without first planning your approach;
- Don't allow fennel to flower and set seed before treatment;
- Don't rely on one attempt at removal - follow-up is essential;
- Don't rely on just one control method.
Spread of fennel
- Fennel is spread mainly by seed. Fennel seed falls to the ground very near the parent plant.
movement of seed occurs where seeds contaminate agricultural produce,
machinery, animal skins and human clothing. Seeds are also spread in
water along drainage lines.
- Fennel can regrow from crown and
root fragments. Spread occurs when crown or root fragments are moved by
cultivation or earth-moving machinery.
Avoid the introduction of fennel
- Avoid introducing fennel seed or root fragments into clean areas, or into areas from which the weed is being eradicated.
- Implements and vehicles which have been used on infested areas should be thoroughly cleaned before leaving the site.
- See the
Washdown Guidelines for Weed and Disease Control for detailed information on how to wash-down equipment and personnel to reduce the chance of spreading fennel.
- Fennel can be grubbed out, but all root material needs to be removed to stop re-sprouting from root fragments.
- Slashing can be used before and over the flowering period to reduce fennel seeding.
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