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Improved water and soil management: the key to future food security Texte intégral
2014
colin j. chartres
Growing global population and a combination of dietary change, biofuels production, urban and industrial water demand and climate change will see food crises becoming more frequent in the next 40 years. Food and feed production must double to feed 9.1 billion people in 2050. This will require using twice as much water as at present or increasing water productivity. It is argued that we need a Blue-Green revolution to deliver water productivity increases. This revolution will depend on increases of both rainfed and irrigated production and has to include improvements in soil fertility and institutional and governance of agriculture and natural resources | Colin J. Chartres, 'Improved water and soil management: the key to future food security', 2014
Afficher plus [+] Moins [-]Effects of food and water on the development, fecundity and longevity of Acanthomia tomentosicollis Stal (Hemiptera, Coreidae)
1976
Egwuatu, I.R., Department of Agricultural Biology, University og Ibadan,Ibadan, (Nigeria) | Taylor, A.T., Institue of Agricultural Rsearch and Training, University of Ife, Moor Plantation, Ibadan, (Nigeria)
Vigna unguiculata, V. aureus, Peureria phaseoloides and Phaseolus vulgaris were suitable as alternate legume food sources for nymphal development of Acanthomia tomentosicollis Stal. Gentrosema pubescens, Galopogonium mucunoides, Grotolaria juncea and Sphenostylis stenocarpa did not support nymphal development beyond the first in star stage and Glycine max supported A. tomentosicollis only to the fourth-instar stage. Nymphal development was completed in 13-21 days on the various suitable food sources. Nymphal mortality was affected by the type of food source. Weights of freshly-emerged adult males and females were significantly influenced by the legume source of food. The longevity of adults reared on Gajanus cajan and V. unguiculata was not different, but the fecundity of the females reared on the latter plant was significantly higher. Access to free water decreased the rate of development but significantly increased both the fecundity and longevity of females
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