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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Modeling the risk of invasion and spread of Tuta absoluta in Africa  [2016]

Guimapi, Ritter Y.A.; Frank T. Ndjomatchoua; George O. Okeyo; Henri E.Z. Tonnang; et al.

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Tuta absoluta is an invasive insect that originated from South America and has spread to Europe Africa and Asia. Since its detection in Spain in 2006, the pest is continuing to expand its geographical range, including the recent detection in several Sub-Saharan African countries. The present study proposed a model based on cellular automata to predict year-to-year the risk of the invasion and spread of T. absoluta across Africa. Using, land vegetation cover, temperature, relative humidity and yield of tomato production as key driving factors, we were able to mimic the spreading behavior of the pest, and to understand the role that each of these factors play in the process of propagation of invasion. Simulations by inferring the pest’s natural ability to fly long distance revealed that T. absoluta could reach South of Africa ten years after being detected in Spain (Europe). Findings also reveal that relative humidity and the presence of T. absoluta host plants are important factors for improving the accuracy of the prediction. The study aims to inform stakeholders in plant health, plant quarantine, and pest management on the risks that T. absoluta may cause at local, regional and event global scales. It is suggested that adequate measures should be put in place to stop, control and contain the process used by this pest to expand its range.
From the journal
Ecological complexity
ISSN : 1476-945X

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2017
Volume:
28
Start Page:
77
End Page:
93
Publisher:
Elsevier B.V.
All titles:
"Modeling the risk of invasion and spread of Tuta absoluta in Africa"@eng
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2017
Volume:
28
Start Page:
77
End Page:
93
Publisher:
Elsevier B.V.
All titles:
"Modeling the risk of invasion and spread of Tuta absoluta in Africa"@eng