Species Information, Production, Functions, Applications, Patent, Consultants, Reports, Market
Primary Information Services
. Ordering Information. Contact

Project @ a Glance

Contents on the CD Rom

  • Yam is the common name for some species in the genus Dioscorea (family Dioscoreaceae). These are perennial herbaceous vines cultivated for the consumption of their starchy tubers in Africa, Asia, Latin America and Oceania. They are used in a fashion similar to potatoes and sweet potatoes. There are hundreds of cultivars among the cultivated species. 
  • Yam is a tuber food crop which is produced in nearly every part of the tropical regions. It greatest importance is attained in West Africa where more than 90% of worldwide production (40 millions tons of fresh tubers) is being produced. Yam is grown traditionally in shifting agricultural systems without any external inputs as the first crop coming after the natural vegetation or after a long period of fallow. However in regard to the rate of population increase and therefore to the future food demand of the population, very little new surfaces remain to be brought into cultivation. 
  • Yams are a primary agricultural commodity in West Africa and New Guinea. They were first cultivated in Africa and Asia about 8000 B.C. Yams are important to this day for survival in these regions. Yam tubers can be stored up to six months without refrigeration, which makes them a valuable resource for the yearly period of food scarcity at the beginning of the wet season. Yams are used as food plants by the larvae of some Lepidoptera species including Palpifer sordida.Yams are high in Vitamin C, dietary fiber, Vitamin B6, potassium and manganese; while they are low in saturated fat, sodium and cholesterol.
  • Yam edible tubers feed million of peoples in the intertropical area, where they represent 12% of human feeding. However, as a vegetatively propagated crop, yam is seriously affected by an accumulation of pathogens. Establishing in vitro germplasm collection is a process that clean the plants from all diseases but viruses. It give a good control on the preservation of the yam genetic resources and facilitate international exchanges of healthy plant material.
  • The tropical yam (Dioscorea alata) should not be confused with sweet potato, which is sometimes called ‘yam’ in the United States. Its consumption by various ethnic groups (African, Caribbean, Latin American and Asian) has helped extend its trade to the major industrialized countries. After a slight drop in imports between 1997 and 1998 import levels increased 18 percent between 1998 and 1999 to 28,910 MTs. Despite the gains in volume, the corresponding value of fresh yam imports fell from approximately $25 million in 2000 to $22 million in 2001. Volume fell from 29 MTs in 2000 to 26 MTs in 2001.
  • Moreover yields in traditional farming systems are low and instable varying between species, between production zones and from years to years. Potential yield is assumed to attain 60-75 tons of fresh tuber per hectare. Yam consumption increases rapidly and in 2020, the annual demand is foreseen to increase to 60 millions of tons. 
General Information

Species Information

  • Dioscorea alata
  • Dioscorea bulbifera
  • Dioscorea discolor
  • Dioscorea elephantipes
  • Dioscorea kamoonensis
  • Dioscorea oppositifolia
  • Dioscorea villosa
  • Dioscorea tokoro
  • Dioscorea batatas

Production and Management

  • Preliminary Diagnostic of Haitian Yellow Yam
  • Yam diseases and its management in Nigeria
  • Microbially Produced Phytotoxins and Plant Disease Management 
  • Stability of Yam Starch Gels During Processing
  • Effect of Four Procedures of Extraction on Yam Starch


  • The Contribution of an Ionic Peroxidase Isozyme to Enzyme-Mediated Browning in Dioscorea esculent 
  • The Mucilage of Yam Tuber Exhibited Angiotensin Converting Enzyme Inhibitory Activities 
  • Physico-chemical characterisation of yam
  • Isolation and Characterization of Starches from eight Dioscorea alata 
  • In Vitro Storage and Safe International Exchange of Yam Germplasm

Cultivars and Consultants

  • Mountain Gardens
  • Biotech Company
  • Agro Products Company
  • Consultants
  • Consultants Resume
  • Expertise


  • Polysaccharide Extract of Dioscorea Sp and an Orally Active Pharmaceutical Composition Comprising the Same
  • Process for the Preparation of Angiotensis Converting Enzyme Inhibitors and Its Use
  • Extract of Dioscorea Sp and the Medicinal Uses Thereof
  • Method of Preparing Dioscorea Tincture and Uses Thereof
  • Pharmaceutical Composition and Method for Making the Same
  • Processes for Products from True Yam



  • Therapeutic Action, Pharmacology and application of Wild Yam
  • Wild Yam Uses
  • Medicinal Succulents
  • Dioscorea Used in Chinese Medicine

Products and Material Safety Data Sheet

  • Wild Yam Root USA
  • SeboCure
  • KB-C
  • Chinese Yam
  • Nervous Fatigue Formula
  • Air Potato Bulb Powder
  • Products List


  • Yam and Cowpea Diversity Management by Farmers in the Guinea 
  • Herbal Medicine
  • Medicinal Plants & Extracts
  • Market Survey on Tissue Cultured Plants
  • Yams
  • Tropical Root and Tuber Crops


  • Adaptation of Yam Cultivation to Changing Environment and Economic Constraints in Benin
  • Medium-term and long-term in vitro conservation and safe international exchange of yam 
  • Descriptors of Yam
  • Modeling the growth of yam
  • Agriculture Tribune
  • Observed Improvements in Respiratory Air Flow in Asthmatics 
  • Foreign Exploration fro Biological Control Agents of Three Invasive Species From Asia
  • A Brief Report on a Large Mountain-top Community of Dioscorea Praehensilis in the Tropical Rainforest of Southeastern Cameroon

Suppliers and Buyers

  • Dioscorea villosa Extract Suppliers
  • Dioscorea Selling Leads
  • Radix Dioscorea Manufacturers
  • River Zoo Farm
  • Dioscorea Sellers
  • S. S Herbals
  • Victory Corporate & Technical Services Pvt. Ltd
  • Wild yam Buyers List

Project  and Guides

  • Invasive Non-Native Plant Control Project
  • Production of Saponin and Wolbachia, a Hormonal Medicine
  • Identification of resistance to major nematode pests of yams
  • Medicinal Herb Production Guide
  • Safe Movement of Yam Germplasm

    Order the CD ROM Today

Primary Information Services
 21 Murugappan St, SwamyNagar Ext2, 
Ullagaram, Chennai - 600091, India.
 Phone: 91 44 22421080 
Email : informer@eth.net
Mobile numbers:9940043898, 9444008898  Fax : 91 44 22423753