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Durban Early Detection and Rapid Response

Creeping Crofton Weed Ageratina riparia

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Common Name
Creeping Crofton Weed
Classification
CARA Category 1
NEMBA 1b

The Mistflower is a low-growing, sprawling perennial herb that grows up to 1m high. It has purplish stems which produce roots at joints that touch the ground, and serrated leaves that reach 7.5cm long and 2.5cm wide that taper at each end. The flowers, which bud and flower between August and September, are white with dense heads at the ends of the branches. The seeds are black, slender, angular, 2 mm long, with fine white hairs at the tip. They are dispersed by wind and flowing water. This plant belongs to the Asteracea family and originates from Central America.

Why is it a problem?
It competes with, and has the potential to replace, indigenous species.
Control method
Where possible, plants should be treated before flowering, and certainly before a hard seed is formed. Mistflower can be pulled out when small, but must be disposed of correctly by burning them or leaving them in plastic bags to rot. Cultivation, grubbing, hoeing and burning, along with planting of competitive pastures combined with fertilisation, will control the weed in accessible areas. Herbicides are available for this invasive plant.
Where is it a problem?
Western Cape and Gauteng, and more recently KwaZulu-Natal

Identifying other species

For help with identifying other species, submit your photo and observations to
iSpot: www.ispot.org.za

The iSpot experts may be able to provide a name.

 

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