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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Effect of vegetation on density thresholds of adult desert locust gregarization from survey data in Mauritania
Entomologia Experimentalis et Applicata, Volume 149, No. 2, Year 2013
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Description
In the desert locust, Schistocerca gregaria (Forskål) (Orthoptera: Acrididae), the threshold density inducing the gregarization phenomenon has never been determined under natural conditions. The influence of environmental factors on this phenomenon has been studied mostly in controlled environments. Based on data collected during several years by the survey teams of the National Center for Locust Control in Mauritania, we analyzed the influence of locust density, vegetation cover, and vegetation status on the probability of observing gregarious locusts. We assumed that a probability to observe gregarious locusts of 0.5 corresponded to the density threshold of gregarization. The results showed in detail the change in the threshold of gregarization according to the cover and status of the vegetation. Low cover and dry vegetation led to a low density threshold of gregarization probably due to high probability of individuals to touch each other. Dense and green vegetation favored a high threshold of gregarization probably due to a dispersion of the individuals and a low probability of individual encounters. These findings should help the management of locusts and decision making during control operations. © 2013 The Netherlands Entomological Society.
Authors & Co-Authors
Cissé, Sory
Mali, Bamako
Centre National de Lutte Contre le Criquet Pèlerin
Ghaout, Saïd
Morocco, Agadir
Centre National de Lutte Antiacridienne
Mazih, Ahmed
Morocco, Agdal Rabat
Institut Agronomique et Veterinaire Hassan Ii
Babah Ebbe, Mohamed Abdallahi Ould
Mauritania, Nouakchott
Mauritanian Desert Locust Centre Centre National de Lutte Antiacridienne
Benahi, Ahmed Salem
Mauritania, Nouakchott
Mauritanian Desert Locust Centre Centre National de Lutte Antiacridienne
Piou, Cyril
France, Paris
Cirad
Statistics
Citations: 41
Authors: 6
Affiliations: 5
Identifiers
Doi:
10.1111/eea.12121
ISSN:
00138703
e-ISSN:
15707458
Study Design
Cross Sectional Study
Study Approach
Quantitative
Study Locations
Mauritania