Get the Latest information on fighting weeds - Port Macquarie ...
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Comm<strong>on</strong> name: Coreopsis Latin name: Coreopsis lanceolata<br />
FAMILY: ASTERACEAE<br />
ORIGIN:<br />
Noxious Weed Category: n/a<br />
Descripti<strong>on</strong><br />
Habit: A short lived perennial from <str<strong>on</strong>g>the</str<strong>on</strong>g> American prairies, Coreopsis is a bright yellow daisy carpeting rural<br />
roadsides in spring and early summer. L<strong>on</strong>g lanceolate leaves in basal clusters. Leaves: Lanceolate, basal<br />
rosette developing into a tuft, green above, whitish beneath. Flowers: Yellow, compound ‘daisy’-like,<br />
singularly <strong>on</strong> peduncle (flower stalk) to 60cm, ray florets (outer petals of flower head) are too<str<strong>on</strong>g>the</str<strong>on</strong>g>d <strong>on</strong> <str<strong>on</strong>g>the</str<strong>on</strong>g><br />
ends. Fruit: An achene (hard-coated) with 2 papery ‘wings’, small (1-2mm).<br />
Ecology: A short lived perennial herb which produces abundant seed that germinates readily under high<br />
light and heat c<strong>on</strong>diti<strong>on</strong>s; well suited to road-sides, burned heath, dunes, compacted turf or recreati<strong>on</strong><br />
areas, overstocked/degraded pasture <strong>on</strong> poor soils. Coreopsis is now a widespread envir<strong>on</strong>mental weed <strong>on</strong><br />
poor soils and in open grassland and woodland. It is spread rapidly by wind and forms interc<strong>on</strong>nected root<br />
mats.<br />
Dispersal: Its tiny seeds are spread rapidly by wind al<strong>on</strong>g roads and railway lines. Also spreads<br />
vegetatively via underground rhizomes. To a lesser degree in dumped garden waste and as a c<strong>on</strong>taminant<br />
in soil (‘clean fill’) <strong>on</strong> farms and civil c<strong>on</strong>structi<strong>on</strong>.<br />
C<strong>on</strong>trol: Hand weeding is time c<strong>on</strong>suming but successful. Each sister plant must be traced and removed.<br />
Seeds are l<strong>on</strong>g lived, so new seedlings will need to be weeded out every year.<br />
Spraying with a glysophate at 10mL L -1 flowering is successful.<br />
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