Cauliflower Brassica oleracea var. botrytis (L.) Alef.
Order - Capparales
Family - Brassicaceae
Names:
Brassica is the Latin name for Cabbage
Oleracea
Botrytis
Cauliflower.
Other Names:
Summary:
A common vegetable with large, white, edible flower heads.
Description:
Cotyledons:
Two.
Leaves:
Stipules -
Petiole -
Blade - Broad, blue green.
Stem leaves -
Stems:
Flower stem - Initially compact, later elongating.
Flower head:
Large, umbrella like, white.
Flowers:
Ovary -
Calyx -
Perianth -
Sepals -
Petals -
Stamens -
Anthers -
Fruit:
Cylindrical pod with convex valves.
Seeds:
Small, globular.
Roots:
Taproot.
Key Characters:
Biology:
Life cycle:
Biennial or perennial. Commercial crops are grown as annuals and take 2-4 months to mature.
Physiology:
Reproduction:
By seed or transplants.
Flowering times:
Spring.
Seed Biology and Germination:
Vegetative Propagules:
Hybrids:
Allelopathy:
Population Dynamics and Dispersal:
Spread mainly by intentional planting.
Origin and History:
Europe.
Distribution:
ACT, NSW, QLD, SA, TAS, VIC, WA.
Habitats:
Climate:
Temperate. Mediterranean.
The best heads are produced when they mature in cool conditions.
Soil:
Wide range from sands to clay loams.
Prefer a pH of 6-7 but still grow well on alkaline soils.
Plant Associations:
Significance:
Beneficial:
Widely cultivated vegetable crop.
Detrimental:
Weed of roadsides and disturbed areas.
Toxicity:
Not recorded as toxic.
Legislation:
None.
Management and Control:
Thresholds:
Eradication strategies:
Not usually required.
Most of the Brassicaceae weeds have dormant seeds that continue to germinate throughout the season and for several years. They often mature and set seed very quickly. Manual removal is effective but must be done at least every 8-10 weeks. Once pods are formed, seed will often mature even if the plant has been uprooted. Soil disturbance often leads to a flush of seedlings.
Many are somewhat unpalatable, so grazing only offers partial control. They often flourish in undergrazed, sunny areas.
In bushland situations, fairly selective control can be achieved with 100 mL spray oil plus 0.1 g Eclipse® or 0.5 g Logran® in 10 L water. 5 mL Brodal® is often added to this mix to provide residual control of seedlings. Spray the plants until just wet from the seedling stage up to pod formation.
Isolated plants should be removed manually and burnt if flowering or seeding and a 10 m buffer area sprayed with 10 mL Brodal® in 10 L water.
500 mL/ha of glyphosate(450g/L) can be used at flowering to reduce the seed set of most species on roadsides without causing significant damage to most native plants.
Wick application with 1 part glyphosate(450g/L) in 2 parts water or overall spraying with 100 mL glyphosate(450g/L) in 10 L water provides reasonable control of most species though Wild Radish tends to regrow.
Herbicide resistance:
Biological Control:
Pests include Cabbage Aphid, Cabbage White Butterfly larvae and Cabbage Moth larvae.
Diseases include Black Rot, Black Leg, Ring Spot, Club Root, Cabbage Yellows and Leaf Spot.
Related plants:
Black Mustard (Brassica nigra)
Broccoli (Brassica oleracea var. italica)
Brussels Sprouts (Brassica oleracea var. gemmifera)
Cabbage (Brassica oleracea var. capitata)
Cauliflower (Brassica oleracea var. botrytis)
Chinese Cabbage (Brassica chinensis)
Indian Mustard (Brassica juncea)
Kale (Brassica oleracea var. acephala)
Kohlrabi (Brassica oleracea var. gongylodes)
Rape or Canola (Brassica napus var. napus)
Rapeseed (Brassica rapa var. sylvestris)
Savoy cabbage (Brassica oleracea var. sabauda)
Smooth Stemmed Turnip (Brassica oxyrrhina)
Swede (Brassica napus var. napobrassica)
Turnip (Brassica rapa var. rapa)
Twiggy Turnip (Brassica fruticulosa)
Winter Rape (Brassica napus var.biennis)
Brassica elongata
The native Brassicaceae species usually have short, broad and smooth pods.
Plants of similar appearance:
References:
Hussey, B.M.J., Keighery, G.J., Cousens, R.D., Dodd, J. and Lloyd, S.G. (1997). Western Weeds. A guide to the weeds of Western Australia. (Plant Protection Society of Western Australia, Perth, Western Australia). P115.
Lazarides, M. and Hince, B. (1993). CSIRO handbook of economic plants of Australia. (CSIRO, Melbourne). #195.10.
Reid, R.L. (1990) The Manual of Australian Agriculture. (Butterworths, Sydney). P143-144.
Acknowledgments:
Collated by HerbiGuide. Phone 08 98444064 or www.herbiguide.com.au for more information.