Bureaucrat, administrator, widgeteditor
146,870
edits
Changes
no edit summary
<big>''[[Phaseolus acutifolius]]'' A. Gray</big>
__NOTOC__
:Protologue: Pl. Wright. 1: 43 (1852).
=== Synonyms ===
*''Phaseolus tenuifoliusWoottenuifolius'' Woot. & Standley (1913).
=== Vernacular names ===
*Tepary bean (En).
=== Origin and geographic distribution ===
=== Production and international trade ===
Growing of tepary beans is mainly confined to Mexico and Arizona. In tropical Africa they are grown year- round as a food crop. No data are available.
=== Properties ===
=== Botany ===
*A sub-erect annual herb up to 30 cm high, bushy on poor land, otherwise recumbent, spreading or twining to 2 m length. *Leaves trifoliolate; leaflets ovate, 4-8 cm x × 2-5 cm. *Inflorescences axillary with 2-5 white or pale lilac flowers. *Pods straight or slightly curved, compressed, 5-9 cm x × 0.8-1.3 cm, 2-7-seeded, rimmed on margins, sharp beaked, hairy when young. *Seeds roundish to oblong, about 8 x × 6 mm, white, yellow, brown or deep violet, sometimes variously flecked. The seeds absorb water very easily. *Germination is epigeal. First pair of leaves is simple. Tepary bean is presumably self-fertilized. It gives a crop in as short a time as 2 months, but some cultivars need up to 4 months.
Tepary bean is presumably self-fertilized. It gives a crop in as short a time as 2 months, but some cultivars need up to 4 months. At present two varieties are distinguished: var.''acutifolius'' (the wild forms; seeds small and greyish; leaflets very variable from ovate to linear; N. Mexico, S. USA) and var.latifoliusFreeman ''latifolius'' Freeman (the cultivated bean; seeds larger and variously coloured; preferably grouped as cv.- group).
=== Ecology ===
Tepary beans are short-day or day-neutral plants. They withstand heat and dry atmosphere and are quite drought-resistant. They are very susceptible to waterlogging and frost and are not suited to the wet tropics.
Temperature may not drop below 8<sup>°</sup>C8°C. Annual mean temperature should be between 17-26<sup>°</sup>C26°C. It can grow in areas with annual rainfall of 500-600 mm, in areas up to 1700 mm. It can be grown on poor shallow soils, ranging in pH from 5-7. In areas with average rainfall of 1000 mm/year or more, the plant usually makes excessive vegetative growth at the expense of seed yield.
=== Agronomy ===
Tepary bean is propagated by seed. Seeds may be broadcast at rate of 28-33 kg/ha or drilled 2-10 cm deep, in rows of 90 x 45 cm, at rate of 11-17 kg/ha; sometimes they are planted on hills, 45 cm apart with 2-4 seeds per hill. When grown for hay it is usually seeded at more than 60 kg/ha.
The crop may be irrigated, but is not usually done. It is sensitive to salty water and soils. It is often grown as a catch-crop and requires little weeding if grown as end-of-season crop. Tepary bean responds favourably to applications of N and 75 kg/ha of K<sub>2</sub>O.
Tepary bean is practically disease-free under savanna conditions. In Burma it was susceptible to attack from a root rot,Rhizoctoniasp.
As soon as the first pods start to ripen whole plants are pulled up, dried and threshed. === Yield === averages 500-800 kg/ha under dry farming conditions, 900-1700 kg/ha under irrigation. === Yield === s Yields up to 5000 kg dry beans/ha are reported. === Yield === of oven-dry hay is about 5-10 t/ha.
=== Prospects ===
=== Literature ===
== Authors ==
