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The bean fly (Ophiomyia spp.) is considered the most economically damaging field insect pest of common beans in Uganda. Despite the use of existing pest management approaches, reported damage has remained high. Forty-eight traditional and improved common bean varieties currently grown in farmers’...
The present situation of cassava cultivation in Caicedonia (Colombia) is studied after 8 yr cooperation between the Nat. Federation of Coffee Growers and CIAT. From an iitial 60 ha and 8 farmers in 1971, the project had developed more than 1300 ha (90 farmers) by the end of 1978. Yields have decl...
Plant tissue culture includes a wide range of techniques: protoplast, cell, anther, callus, meristem and organ culture, all having one common factor: the growth of vegetative material in an aseptic environment; i,e., the sterilized culture medium in test tubes. In spite of the fact that several o...
Cassava is a low-priority crop in agricultural development policies in most L.A. countries, limiting active research and extension activities. A description is given of CIAT-generated low- cost technology that can increase yields. This package consists of the visual selection of planting material...
Methods of vegetative reproduction are discussed using the results obtained with cassava and potato. Results of clone cleaning by heat therapy and in vitro meristem culture are given. Two methods for rapid cassava multiplication are proposed: by sprouts from cuttings and single leaf cuttings, whi...
To help farmers identify the disease, the symptoms of witches` broom are described and illustrated. A serious disease of cassava in the state of Ceara, Brazil, it has caused yield reductions of over 60 percent. All diseased material should be burned. To control the disease, healthy planting mater...
CIAT`s contribution to this joint research program was (1) to develop a technique for the production of bacteria-free planting stocks of cassava and (2) to study the effect of physical therapeutic agents on vegetative material used for propagation. The propagation technique developed to produce C...
The most important bacterial disease of cassava is cassava bacterial blight (CBB). This disease was first recorded in Brazil but was later reported in Colombia and observed in several other countries in South America and Africa. Symptoms of this disease are leaf spotting, wilting, dieback and gum...
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