Argemone ochroleuca Sweet subsp. ochroleuca (Mexican poppy) is widespread throughout NSW, it has cream to pale yellow petals; seeds approximately. Argemone mexicana subsp. ochroleuca (Sweet) Schwarzb., Pl. Syst. Evol. (3- 4): , comb. inval. Argemone mexicana var. Abstract. The effects of 2 concentrations (15 and 30%) of ethanolic Argemone ochroleuca Sweet (Papaveraceae) extracts were determined on the feeding.
Sheldon Navie young argemkne forming a rosette Photo: Deeply divided leaf showing the many yellow stiff prickles. When the flowers open they are quite showy cm occhroleuca with six pale yellow, lemon or cream-coloured petals about 25 mm long.
The entire plant is also known to break off at the base when it dies off and can be blown long distances, thereby helping to spread any seed still present in the old capsules. Ochroeluca of this species may also become tangled in the wool of sheep, reducing its economic value Reseigh and Shepherd, Creamy white to yellow flower. While every care is taken to ensure the accuracy of this information, DEEDI does argemoje invite reliance upon it, nor accept responsibility for any loss or damage caused by actions based on it.
Distribution Table Top of page The distribution in this summary table is based on all the information available. Biological control of weeds in the Northern Territory.
Stamens mm long; anthers oblong, recurved. The prickly stems are conspicuously bluish-green or greyish-green in colour i. Glyphosate provides good control in non-selective situations. A subspeciesA.
More recently however, South Africa has initiated a biocontrol programme for this weed and has imported a number of insects into their quarantine facilities for host range testing van der Westhuizen and Mpedi, Argemone mexicanaA. According to Flora of North Americait is present at altitudes of m. The first true leaf is narrow with three triangular, pointed lobes at the tip and a tapering base.
Chemical Control Cohroleuca herbicides provide good control of young plants, such as 2,4-D amide and 2,4-D ester. CAB International, pp. Harvesting crops in field infested with Argemone ochroleuca can be painful. Control of young plants of A.
This means that the growth and spread must be controlled and that the species must not ochrolleuca be introduced into the state Queensland Government, Argenone parts of the plant are toxic to animals and man. Alien weeds and invasive plants: Click on images to enlarge.
Flowering occurs mostly during spring and summer, but may also occur throughout the rest of the year. Global Biodiversity Information Facility.
Quantifying threats to imperiled species in the United States. In Australia, the majority of seed is dispersed by flood waters Northern Territory Government, Pale yellow or creamy white flowers from September to January.
Ecological Monographs, 69 1: It is also declared under legislation in Western Australia Queensland Government, Title Flowering habit Caption Argemone ochroleuca pale Mexican pricklypoppy ; flowering habit. Melbourne, Australia; Inkata Press, pp.
Argemone ochroleuca – Wikispecies
Mexican poppy, prickly poppy, devil’s fig, golden thistle of Peru, biniguy thistle, white thistle, yellow poppy, Mexican thistle, Mexican prickle poppy. National Germplasm Resources Laboratory. Council of Heads of Australasian Herbaria.
Argemone ochroleuca Ochroleucca Argemone subfusiformis Ownbey subsp. Locations within which Argemone ochroleuca is naturalised include Australia, Africa, tropical Asia, New Zealand and some oceanic islands with warm climates.
However, despite surveys for natural enemies taking place in Mexico this programme was put on hold as there were doubts over the impacts of these species in Australia Julien, ; Julien et al.
However, the widespread introduction of A. More information about ochorleuca web browsers can be found at http: Plant Protection Research Institute, Handbook The margin edge of the leaf has wavy prickles at the tips of the lobes as well as scattered on the underside of the leaf.
Control is generally best applied to the least infested areas before dense infestations are tackled.
Accidental Introduction The large number of seed may contaminate agricultural produce e. Journal of Economic and Taxonomic Botany, 26 1: Native to tropical America but its exact native range is disputed.
Indian Forester, 7: Soil Tolerances Top of page Soil drainage free Soil texture light medium Special soil tolerances saline. Some components of an integrated management approach are introduced below. When the fruit is ripe it opens from the apex downwards, splitting away from the style with ribs attached to the stigma and so resembling the ribs of an umbrella. Wilson, ; Council of Heads of Australasian Herbaria, Title Rosette Caption Argemone ochroleuca pale Mexican pricklypoppy ; rosette.