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CABIINVASIVES 21/02/17 The locust invasions devastating Niger. February 21, 2017 by cabi communications Copyright: Panos It is the end of December 2016, with clear skies over Niger.

CABIINVASIVES 21/02/17 The locust invasions devastating Niger

But as 2017 draws near prospects are grim for some 500 residents in Bani Kosseye, a village 80km from the capital Niamey. Agricultural production has been poor here, and families’ meagre stocks are expected to run out within a few weeks. People already fear famine.The main cause for this food stress is none other than locusts. The various institutions set up to combat the locust threat in Niger classify the insects into two main groups: desert locusts and grasshoppers. Desert locusts, on the other hand — which are associated with the eighth biblical plague — have the ability to swarm into several dozen million individuals capable of travelling long distances across several countries to devastate fields.

Idrissa Maiga, a locust expert at the Agrhymet Regional Centre in Niamey, says “it is a species with an extraordinary reproductive capacity. CROPLIFE 01/12/13 Desert Locust Plagues Managed With Insecticides. Leonard Gianessi Since prehistoric times, plagues of desert locust (a large grasshopper that swarms) have threatened agricultural production in Africa, the Middle East, and Asia.

CROPLIFE 01/12/13 Desert Locust Plagues Managed With Insecticides

It lives in arid habitat, extending from the north equator in Africa, the Red Sea coasts and the Near East, to south west Asia. This vast area is called the recession area; it doubles in size during plagues from 16 million square kilometers to an invasion area of around 29 million square kilometers, affecting 20% of the earth’s surface comprising 65 countries. Solitary locusts live at low densities and do not cause threats to crops, but under favorable conditions they rapidly breed to produce vast numbers of gregarious locusts that congregate to form swarms.

The aim of the preventive control strategy against the locust is to control formation of hopper bands in the breeding areas during upsurges, which is generally desert or semi-desert, to prevent formation of swarms and movement into agricultural areas. 1. ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA 26/06/15 Estimation of density threshold of gregarization of desert locust hoppers from field sampling in Mauritania.

For desert locusts, Schistocerca gregaria (Forskål) (Orthoptera: Acrididae), the hopper density threshold of gregarization remains poorly documented.

ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA 26/06/15 Estimation of density threshold of gregarization of desert locust hoppers from field sampling in Mauritania

Field sampling was carried out in traditional seasonal breeding areas of Mauritania during two successive years without invasion to approximate the gregarization threshold. Hopper densities were assessed at numerous sampling sites. Vegetation was also sampled to characterize the habitats. Hopper behavior was analyzed in situ with the help of a behavioral circular arena to test our assumptions on empirical locust phases determination based on physical appearance (coloration and behavior) following FAO guidelines.

The results provided a critical density value around 2.45 hoppers m−2, above which gregarious hoppers were expected to be seen more frequently in nature. FAO - JUIN 2016 - FAO COMMISSION FOR CONTROLLING THE DESERT LOCUST IN THE CENTRAL REGION (CRC) FIFTY YEARS FIGHTING DESERT LOCUST. Physiological Entomology (2016) 41, 83 Ability of the desert locust (Schistocerca gregaria) to compensate for visual deprivation during the final pre-adult and adult stages. PLOS 13/05/15 Potential of the Desert Locust Schistocerca gregaria (Orthoptera: Acrididae) as an Unconventional Source of Dietary and Therapeutic Sterols. Abstract Insects are increasingly being recognized not only as a source of food to feed the ever growing world population but also as potential sources of new products and therapeutic agents, among which are sterols.

PLOS 13/05/15 Potential of the Desert Locust Schistocerca gregaria (Orthoptera: Acrididae) as an Unconventional Source of Dietary and Therapeutic Sterols

In this study, we sought to profile sterols and their derivatives present in the desert locust, Schistocerca gregaria, focusing on those with potential importance as dietary and therapeutic components for humans. Using coupled gas chromatography-mass spectrometry (GC-MS), we analyzed and compared the quantities of sterols in the different sections of the gut and tissues of the locust. In the gut, we identified 34 sterols which showed a patchy distribution, but with the highest composition in the foregut (55%) followed by midgut (31%) and hindgut (14%). Fed ad libitum on wheat seedlings, five sterols unique to the insect were detected.

Academic Editor: Mohana Krishna Reddy Mudiam, CSIR- Indian Institute of Toxicology Research, INDIA Introduction. FAO - FEV 2015 - Situation Update: Locust Crisis in Madagascar - 9 Ferbuary 2015. AFP 18/08/13 Le Niger menacé par une invasion de criquets. Int.J.Curr.Microbiol.App.Sci (2013)2(8):389-395 Biological activity of essential oils leaves from one Sahara plant: Peganum harmala L. (Zygophyllaceae) on the desert locust. AGRIRESEAU 18/07/14 LES CRIQUETS EN GRANDES CULTURES : BIOLOGIE, DÉPISTAGE ET STRATÉGIE D’INTERVENTION. SCIENTIFIC REPORTS 05/12/14 Construction of a Hypervirulent and Specific Mycoinsecticide for Locust Control. Expression of ion channels peptide blockers in Metarhizium specialist We compared the efficacy against M. femurrubrum grasshoppers of recombinant M. acridum expressing four arthropod toxins with different modes of action.

SCIENTIFIC REPORTS 05/12/14 Construction of a Hypervirulent and Specific Mycoinsecticide for Locust Control

Expression of AaT1, a blocker of voltage-gated sodium (NaV) channels from the scorpion Androctonus australis, has already been tested in M. anisopliae12. ω-HXTX-Hv1a (Hv1a) from the Sydney funnel-web spider Atrax robustus is a blocker of insect voltage-gated calcium (CaV) channels17. κ-HXTX-Hv1c (Hv1c) from the Blue Mountains funnel-web spider Hadronyche versuta inhibits Ca2+-activated K+ (KCa) channels18. Hybrid-toxin is a self-synergizing peptide toxin from the venom of the Australian funnel-web spider H. verusta that targets both CaV and KCa channels19. This insecticidal peptide, also known as Versitude, was recently approved by the U.S. EPA for control of lepidopteran pests. CIRAD - JUIN 2014 - Criquet pèlerin : des populations solitaires abondantes et très mobiles.

Le criquet pèlerin (Schistocerca gregaria), ou criquet du désert, vit essentiellement dans la région saharienne.

CIRAD - JUIN 2014 - Criquet pèlerin : des populations solitaires abondantes et très mobiles

Solitaire, il est inoffensif. Grégaire, il devient redoutable pour les cultures. Ses essaims peuvent alors compter plusieurs milliards d’individus et contaminer 30 millions de kilomètres carrés, de la Mauritanie à l’Inde, du Maghreb au Kenya. Les dégâts qu’il provoque sont considérables. Les populations solitaires restent une énigme Les populations grégaires, des périodes d’invasion, sont assez bien connues. Discrètes dans l’immense Sahara, migrant uniquement la nuit, elles passent souvent inaperçues. CIRAD 20/05/14 Criquets pèlerins : une étude d’envergure perce le mystère des populations solitaires. FAO - OCT 2013 - Au sommaire: La résurgence des criquets en Mauritanie nécessite un renforcement des systèmes de suivi et traitement.

FAO - 2014 – MADAGASCAR - Response to the locust plague - Programme – Campaign n° 2 2014/2015. FAO 26/06/13 Madagascar: une invasion généralisée de criquets fait peser une grave menace de crise alimentaire. Les essaims de criquets pèlerins peuvent faire des centaines de km, dévastant pratiquement toute la végétation sur leur passage 26 juin 2013, Rome - Madagascar est confronté à une invasion massive et non maîtrisée de criquets qui pourrait mettre sérieusement en péril sa sécurité alimentaire.

FAO 26/06/13 Madagascar: une invasion généralisée de criquets fait peser une grave menace de crise alimentaire

Une campagne de lutte de grande envergure nécessite la mobilisation d'urgence d'un minimum de 22 millions de dollars pour pouvoir démarrer à temps au moment des prochains semis de septembre. Or, à ce jour, les fonds alloués en réponse aux appels de la FAO sont nettement insuffisants.La FAO estime que, d'ici septembre, les deux tiers du pays seront infestés par les acridiens.

FAO 02/02/15 LOCUST WATCH - Desert Locust situation update. FAO 21/01/15 A Madagascar, tarissement des fonds pour lutter contre les criquets. Ces paysans observent une équipe de lutte antiacridienne à pied d’œuvre dans leur champ dans la région de Betroka (sud-est de Madagascar) 21 janvier 2015, Rome – A Madagascar, la lutte contre l'invasion acridienne risque d'être perdue à cause du tarissement des fonds nécessaires à la poursuite des opérations engagées pour maîtriser les infestations acridiennes, qui posent un défi majeur à la sécurité alimentaire de 13 millions de personnes.

FAO 21/01/15 A Madagascar, tarissement des fonds pour lutter contre les criquets

Faute de pouvoir mener à son terme le Programme antiacridien 2013-2016 mis en œuvre par la FAO et le gouvernement malgache, les 28,8 millions de dollars engagés jusqu'à présent ne permettraient pas de se prémunir d'une crise alimentaire qui pourrait affecter une grande partie du pays.