Doctors Rocks Penguin Management Plan st 31 October 2010
Appendix 7 (continued). Weed control recommendations Weed
Treatment alternatives
Follow up
Three cornered garlic (angled onion)
Spray with herbicide at bulb-exhaustion phase, i.e. just before or early in flowering period (mid-winter to early spring). Take care to avoid spraying native groundcovers.
Soursob
Three cornered garlic can be pulled or dug carefully, ensuring all bulbs are removed. Never handpull soursob, as bulbils will be dislodged.
Control regrowth annually. Will require at least 2 - 5 years of followup.
Fennel
Dig out small plants, making sure to get all crowns and roots. Cut-and-paint larger plants. Spray (best in winter. Use a marker dye as people may harvest fennel).
Sea Wheat Grass
Marram Grass
Pasture grasses, capeweed and other pasture weeds
Monitoring and follow up control will be essential for success. Establish vigorous groundcover such as Bower Spinach to cover bare ground.
Digging out the rhizomes can control small areas of sea wheatgrass. Care must be taken to remove as much as possible and monitor regularly for re-emerging plants. Effective aquatic registered herbicides are available for use on sea wheatgrass. Contact PWS or DPIPWE for advice. Do not control large areas. Control any small infestations in otherwise native areas. Dig out small area of rhizomes to a depth of 50 cm if possible before planting native plants into Marram grassland.
Monitor annually for germinating seedlings until no further plants are found for a few years running
Control these as necessary before revegetation with native species. Spot-spray with glyphosate an area of 1m diameter for each plant to be planted, or larger areas before mass revegetation. Do not attempt large-scale control without a revegetation and followup plan. Avoid creating bare areas which will be invaded by these weeds.
Spray around plant guards in spring until native revegetation has established. Handpull grass and weeds that grow inside plant guards.
Pull up any marram grass invading revegetation plant guards until native plant is well established.
Handpull or carefully spot-spray infestations in otherwise good native vegetation.
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