Heliotropium strigosum Willd. - BORAGINACEAE - Dicotyledon

Common name : hairy heliotrope.

Habit - © Juliana PROSPERI - CIRAD 2005 - 2006 Flowers white and yellow - © Juliana PROSPERI - CIRAD 2005 - 2006 Flower and young fruit - © Juliana PROSPERI - CIRAD 2005 - 2006

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Botany Biology Phenology Ecology Distribution Agricultural importance Cultural control Chemical control

Botany :

Description : Terrestrial, annual or perennial, erect, tufted, or prostrate herb, up to 40 cm long. Taproots white or brown. Stem rounded, solid, hairy. Stipules absent. Leaves, simple, not lobed or divided, alternate spiral or alternate distichous, linear to lanceolate, scabrous below, margin entire, apex obtuse, base rounded or truncate, pinnately veined. Flowers bisexual, grouped together in a terminal, many-flowered cyme, stalked, white, throat yellow, petals 5, fused. Fruit nut-like.

Biology :

Reproduction by seeds.

Phenology :

Usually flowers March to October.

Ecology :

Sandy places, woods on coastal slopes.

Distribution :

Southeast Asia, Fujian, Guangdong, Afghanistan, Bhutan, India, Kashmir, Nepal, Pakistan.

Agricultural importance :

A weed of minor importance.

Cultural control :

Often controlled manually using hand tools.

Chemical control :

2,4-D at 0.5 to 0.8 kg/ha apllied within 20-25 d after emergence provides good control. The weed is moderately susceptible to MCPA.

References :
-Heliotropium strigosum in flora of China @ efloras.org.
-Marita I.G., Keith Moody, Colin M. Piggin. 1999. Upland Rice Weeds of Southeast Asia, IRRI.

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