Cover Mononychellus tanajoa

Mononychellus tanajoa: (Cassava Green Mite)

Publication Date: October, 2014

Section Titles: Background Information, Introduction, Known Distribution, Description and Biology, Host Crops and Other Plants, Potential Distribution

American Journal of Agricultural Economics 96-5

Re-examining the Reported Rates of Return to Food and Agricultural Research and Development

Publication Date: October, 2014

At odds with a vast body of economic evidence reporting exceptionally high rates of return to investments in agricultural research and development (R&D), growth in public R&D spending for food and agriculture has slowed in numerous, especially rich, countries worldwide. The observed R&D spending behavior is consistent with a determination that the reported rates of return are perceived as implausible by policy makers. We examine this notion by scrutinizing 2,242 investment evaluations reported in 372 separate studies from 1958 to 2011.

Busseola fusca

Busseola fusca (African Stem Borer)

Publication Date: September, 2014

Section Titles: Background Information, Introduction, Known Distribution, Description and Biology, Host Crops and Other Plants, Potential Distribution

Cicadulina mbila

Cicadulina mbila (Naudé): (Maize Leafhopper)

Publication Date: September, 2014
 Striga asiatica

Striga asiatica: (Witchweed)

Publication Date: September, 2014

Section Titles: Background Information, Introduction, Known Distribution, Description and Biology, Host Crops and Other Plants, Potential Distribution

Puccinia striiformis

Puccinia striiformis: (Wheat Stripe Rust)

Publication Date: September, 2014

Section Titles: Background Information, Introduction, Known Distribution, Description and Biology, Host Crops and Other Plants, Potential Distribution

Measuring the Effectiveness of Crop Improvement Research

Measuring the Effectiveness of Crop Improvement Research in Sub-Saharan Africa from the Perspectives of Varietal Output, Adoption, and Change: 20 Crops, 30 Countries, and 1150 Cultivars in Farmers’ Fields

Publication Date: July, 2014

A synthesis report on the results of a CGIAR project: Diffusion and Impact of Improved Varieties in Africa (DIIVA) Project – the first major study to focus on the diffusion of improved crop varieties

Measuring the Effectiveness of Crop Improvement Research

Measuring the Effectiveness of Crop Improvement Research in Sub-Saharan Africa from the Perspectives of Varietal Output, Adoption, and Change: 20 Crops, 30 Countries, and 1150 Cultivars in Farmers’ Fields

Publication Date: July, 2014

A synthesis report on the results of a CGIAR project: Diffusion and Impact of Improved Varieties in Africa (DIIVA) Project – the first major study to focus on the diffusion of improved crop varieties

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