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Because cassava consists mainly of starch and contains cyanogenic glucosides, the whole idea of processing is to make it palatable and remove the toxicity. Soaking, fermentation, heating, and drying are the traditional methods used, there is usually residual cyanide, which can vary from traces to high amounts. Amongst populations that consume a lot of cassava products, a high incidence of thyr ...

SUBJECT: fermentacion; acide cyanhydrique; toxicity; secado; manihot esculenta

We taught 25 village volunteers a simple method to produce flour from Dioscorea dumetorum tubers by drying precooked slices and grinding them in a diesel-powered mill. Enriched porridge and fufu prepared during a demonstration session were tasted, the latter with local sauces. The volunteers were then asked to feed their households flour, and each week, we recorded the number of times the flou ...

SUBJECT: consommation alimentaire; cameroon; dioscorea dumetorum; camerun; farine

This publication reports on the proceedings of a meeting that represents the culmination of long-term support, provided by the Health Sciences Division of the IDRC, for research on the relationship between the consumption of cassava and thyroid condition in humans. The workshop brought together scientists from the medical, agricultural, and public health sectors, as well as IDRC staff. The obj ...

SUBJECT: investigacion; toxicity; amerique du sud; manihot esculenta; education

Cassava (Manihot esculenta) and sweet potato (Ipomoea batatas) are the two commonly grown root crops in Malawi. There is also cultivation of yams and cocoyams; however, their hectarage is unknown. Information on the country's root crops is scanty, and the current research program only covers cassava and sweet potato.

SUBJECT: production vegetale; manihot esculenta; plant production; pests; mercadeo

Cassava is the most important root crop grown in Zaire, and both the roots and leaves are consumed.Root yields from local varieties are low because of their low genetic potential and susceptibility to major pests and diseases. Research for the improvement of cassava in Zaire was initiated in 1976, and breeding efforts have resulted in the identification and development of high-yielding varieti ...

SUBJECT: production vegetale; manihot esculenta; plant production; pest resistance; resistance aux maladies

Evidence indicates that uncontrolled entry of live fish into countries of Southeast Asia has at times resulted in the transfer of pathogenic parasites and microorganisms that pose a great economic and ecological threat to the valuable and vulnerable fish stocks. The only practical means of preventing the entry or spread of these disease agents and pests is the institution and implementation of ...

SUBJECT: investigacion; enfermedades parasitarias; research policies; politique de la recherche; reglamentaciones

Currently, considerable emphasis is being placed on intercropping as a better method of crop production in Tanzania. In this study, the crops chosen for experimentation included three cereals (maize, sorghum, and millet) and two legumes (soybean and green-gram). Each cereal was intercropped with each of the legumes at different spacings, to test the effect of combining these crops in different ...

SUBJECT: investigacion; mijos; methods; cultivo intercalado; rendement des cultures

This paper deals with the intercropping of maize with sorghums and groundnuts in the Tabora region of Tanzania. The seasonal rainfall and the dominance of coarse or medium textured soils of low fertility are important factors in the yield differences associated with these crop mixtures.

SUBJECT: tanzania; rain; sorghum; fertilite du sol; cultivo intercalado

This paper discusses cassava and its ability to exploit the tropical environment. Although cassava is grown in association with many other crops, this paper deals mainly with its association to maize and to a lesser extent cowpea. It was concluded that cassava with a long growth period, drought tolerence, and wide low plant density is an ideal crop for exploiting uncertain tropical environment ...

SUBJECT: manihot esculenta; caupi; niebe; intercropping; cultivo intercalado

A trial was established in 1978 to study the interaction of trees with food crops. Eucalyptus melliodora was planted with maize, beans, and sorghum, separately, on clean-weeded and unweeded plots. The results were so encouraging that further trials, intercropping trees with maize and beans, have been established: Eucalyptus camaldulensis, for fuel and poles; Leucaena leucocephala, for fuel and ...

SUBJECT: investigacion; acacia albida; bois de chauffage; cultivo intercalado; eucalyptus