Matambu is a variety ofthe black grain, erect and intermediate agriculture to the main pathogens of economic importance in Costa Rica. Resistance to yellow gold mosaic andhas an advantage over the other varieties ofthe black grains on the market.

It’s name was given by the Technical Committee of the Central Agricultural Canton of the Chiles.

Matambu name corresponds to the Palm Matamba, and used by the Chorotegas, for the manufacturing of baskets in Hojanchain Guanacaste province.

Origin of the variety:

It was introduced to Costa Rica in 2001, in a nursery of Central American adaptation.The B2056 line was a contribution of the ICTA Guatemalafrom this nursery coming from the bean program at El ZamoranoAgricultural School.

The crossing where the line B 2056 (Matambu) was obtained from: DOR 390 X MUS 181. DOR 390 line have as parents (DOR 364 / G18521 / / DOR 365/LM 30630), and MUS 181 line comes from the cross of (XAN 226 x MUS 46) x (G 18252 x (G 13920 x (G 13920 x (13920 G x G 2333) – 3-CM-1-m).

Matambu was evaluated during the period 2001-2012 in 32 tests and 24 plots of validation.

Features of the plant:

  • Hypocotyl Color: Purple
  • Cotyledons color: Purple
  • Primary leaves color: green
  • Trifoliate leaves color: green
  • Trifoliate leaves colors: stems green
  • Stems color: green, with a Jasper purple guides and towards the end of the branches
  • Blooming season: 36 days
  • flower Color: Purple
  • Physiological maturity: 66 days
  • Days to harvest: 72-74 days
  • Growth habit: type II, indeterminate shrub guide short
  • Branch: Compact

Features pods and grains:

  • Unripe bean color: green
  • Mature ripe: green
  • Dried bean color: cream
  • Number of seeds/sheath: 6
  • Seed color: black
  • The weight of 100 seeds: 19 grams