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UKAID Department for International Development (R4D) 1999

Integrated management of Striga species on cereal crops in Tanzania

Striga species - Cereal crops i- Tanzania

UKAID Department for International Development (R4D)

Titre : Integrated management of Striga species on cereal crops in Tanzania

Pays : Tanzanie

Projet de recherche pour le Développement : R7564

DFID Programme : Natural Resources Systems Programme

Organismes de mise en œuvre
Lead Institutes : Natural Resources Institute (NRI)
Managing Institutes : HTSPE Limited
Collaborating Institutes : Department of Animal and Plant Sciences, University of Sheffield ; Ilonga Agricultural Research Institute

Durée : 01-03-1999 à 30-03-2003

Objectif  : To develop and evaluate the control of Striga species in maize and sorghum based cropping systems in Tanzania through the integration of techniques appropriate to smallholder farmers.

The semi-arid areas of Eastern and Southern Africa cover approximately one-third of the land area and support one quarter of the population of the region. Because of inherent resource limitations and a risk prone climate for arable agriculture, these areas include some of the poorest sectors of the population. Many rural households in this environment are regularly under food-deficit, and poverty limits their capacity for investment in crop production, or resource conservation. Striga species are noxious weeds that are widespread constraints to the production of staple cereal crops in semi-arid areas, principally attacking maize, sorghum, finger millet and upland rice. They have been estimated to infest some 40% of the cereal producing areas of sub-Saharan Africa ; S.hermonthica alone may now infest over 10 million hectares. Semi-arid areas of Tanzania lie in a zone where the three most significant Striga species occur that infect cereals, ie : S.asiatica, S.forbesii and S.hermonthica. Most of the districts in semi-arid areas of Tanzania have been surveyed and the distribution of Striga, found throughout these areas, is broadly known. Grain yield loss from parasitised cereal crops is difficult to estimate with any reliablity, due to variations in soil fertility, infestation levels and tolerance of local varieties. Reports of 5-30% loss of potential yield, with crop failure at heavily infested sites, are common in the literature for various parts of Africa. Other consequences of Striga infestation include farm abandonment, now difficult in the face of a shortage of productive arable land, or a change of cropping pattern to less favoured, albeit resistant crop species

Total Cost to DFID : £399,422

Présentation : UKAID

Page publiée le 20 octobre 2015, mise à jour le 28 octobre 2017