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Insights for the Management of Different Locust Species from New Findings on the Chemical Ecology of the Desert Locust

Published online by Cambridge University Press:  19 September 2011

Ahmed Hassanali  and
Magzoub Omer Bashir
Ahmed Hassanali
Affiliation:
International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya
Magzoub Omer Bashir
Affiliation:
International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya
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Abstract

Recent studies on the chemical ecology of the desert locust, Schistocerca gregaria, have unravelled a rich and complex system of pheromonal and other semiochemical-mediated communication in this insect. The key pheromones associated with such behavioural processes as social cohesion and communal egg-laying have been characterised. The semiochemical bases of such physiological processes as maturation of solitarious insects before the arrival of seasonal rains, development of gregarious traits in crowded solitarious insects, development of maturation synchrony in gregarious insects, and maternal transfer of gregarious characters to the offspring are better understood. Desert locust semiochemicals are finding two principal uses: as tools for studying the processes associated with gregarisation and, therefore, for elucidating the eco-physiological mechanisms underlying the development of locust outbreaks; and as agents for interfering or reversing the process of gregarisation. The status of this research and its implication for the development of novel ecologically friendly tactics for the management of different locust species are highlighted.

Résumé

Les études récentes sur l'écologie chimique du criquet du désert, Schistocerca gregaria a révélé un système riche et complexe en médiateurs phéromonaux et autres signaux chimiques intermédiares de communication chez cet insecte. Les principaux pheromones associés à de telles moeurs de comportement comme la cohésion sociale des individus et la ponte sur des sites communs, ont été identifiés. Il existe déjà une meilleure compréhension des éléments à la base des médiateurs chimiques, régissant de tels phénomènes physiologiques comme la maturation des insectes solitaires avant l'arrivée de la saison de pluies, le développement des tendances grégaires au sein d'individus solitaires en bandes, le développement d'une maturation synchrone chez les sujets grégaires, de même que le transfert héréditaire par les femelles à leurs descendants, des caractères de gregarisation. De la découverte des médiateurs chimiques chez le criquet du désert il en découlent deux principaux champs d'applications. En premier lieu cette découverte constitue un outil pour étudier les phénomènes associés à la gregarisation afin d'élucider les méchanismes éco-physiologiques à la base du développement des explosions démographiques chez les criquets. Enfin, la découverte pemet d'étudier les facteurs qui perturbent ou inversent le processus de gregarisation. L'article met en exergue l'état de recherche et son rôle dans le développement de nouvelles stratégies écologiquement saines, dans la lutte contre différentes espèces de criquets.

Keywords

criquetcriquet du désertpheromonessignaux chimiqueslutte anti-acridiennelocustsdesert locustpheromonessemiochemicalslocust management
Type
Research and Review Articles
Information
International Journal of Tropical Insect Science , Volume 19 , Issue 4 , December 1999 , pp. 369 - 376
Copyright
Copyright © ICIPE 1999

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References

REFERENCES

Assad, Y. O. H., Torto, B., Hassanali, A., Njagi, P. G. N., Bashir, N. H. H. and Mahamat, H. (1997a) Seasonal variation in the essential oil composition of Commiphora quadricincta and its effect on the maturation of immature adults of the desert locust, Schistocerca gregaria. Phytochemistry 44, 833–842.CrossRefGoogle Scholar
Assad, Y. O. H., Hassanali, A., Torto, B., Mahamat, H., Bashir, N. H. H. and Bashir, S. E. (1997b) Effects of fifth instar nymphs on maturation of immature adults of the desert locust Schistocerca gregaria (Forskål) (Orthoptera: Acrididae). J. Chem. Ecol. 23, 1373–1388.CrossRefGoogle Scholar
Bashir, M. O., Hassanali, A., Rai, M. M. and Saini, R. K. (2000) Changing oviposition preferences of the desert locust, Schistocerca gregaria (Forskål), suggest a strong species predisposition for gregarisation. J. Chem. Ecol. (In press).Google Scholar
Bouaïchi, A., Roessingh, P. and Simpson, S. J. (1995) Analysis of the behavioural effects of crowding and re-isolation on solitary-reared adult desert locusts (Schistocerca gregaria) and their offspring. Physiological Entomology 20, 199–208.CrossRefGoogle Scholar
Bouaïchi, A., Simpson, S. J. and Roessingh, P. (1996) The influence of environmental microstructure on the behavioural phase state and distribution of the desert locust Schistocerca gregaria. Physiological Entomology 21, 247–256.CrossRefGoogle Scholar
Byer, J. A. (1991) Pheromones and chemical ecology of locusts. Biological Reviews 66, 347–378.CrossRefGoogle Scholar
Carlisle, D. B., Ellis, P. E. and Betts, E. (1965) The influence of aromatic shrubs on sexual maturation in the desert locust Schistocerca gregaria. J. Insect Physiol. 11, 1541–1558.CrossRefGoogle Scholar
Deng, A. L. (1995) Studies of some factors that influence phase dynamics of the desert locust, Schistocerca gregaria (Forskål) (Orthoptera: Acrididae). PhD thesis, University of Khartoum, Sudan, 176 pp.Google Scholar
Deng, A. L., Torto, B., Hassanali, A. and Ali, E. E. (1996) Effects of shifting to crowded or solitary conditions on pheromone release and morphometrics of the desert locust, Schistocerca gregaria (Forskål) (Orthoptera: Acrididae). J. Insect Physiol. 42, 771–776.CrossRefGoogle Scholar
Hagele, B. F., Oag, V., Bouaïchi, A., McCaffery, A. R. and Simpson, S. J. (2000) The role of female accessory glands in maternal inheritance of phase in the desert locust Schistocerca gregaria. J. Insect Physiol. 46, 275–280.CrossRefGoogle Scholar
Hassanali, A. and Torto, B. (1999) Grasshoppers and locusts. In Pheromones of Non-Lepidopteran Insects Associated with Agricultural Plants (Edited by Hardie, J. and Minks, A. K.). CABI Publishing.Google Scholar
Heifetz, Y., Voet, H. and Applebaum, S. W. (1996) Factors affecting behavioural phase transition in the desert locust, Schistocerca gregaria (Forskål) (Orthoptera: Acrididae). J. Chem. Ecol. 22, 1717–1734.CrossRefGoogle ScholarPubMed
Inayatullah, C., El Bashir, S. and Hassanali, A. (1994) Sexual communication in the desert locust (Orthoptera: Acrididae): An evidence of a sex pheromone. Environ. Entomol. 23, 1544–1551.CrossRefGoogle Scholar
Lauga, J. and Hatté, M. (1978) L'activité grégarisante du sable de ponte chez Locusta migratoria L.: Action sur le comportement et la reproduction des individus. Ann. Sci. Nat. Zool. Biol. Anim. (UE) 20, 37–52.Google Scholar
Mahamat, H., Hassanali, A., Odongo, H., Torto, B. and El Bashir, S. (1993) Studies on the maturation-accelerating pheromone of the desert locust Schistocerca gregaria (Orthoptera: Acrididae). Chemoecology 4, 159–164.CrossRefGoogle Scholar
McCaffery, A. R., Simpson, S. S., Saiful Islam, M. and Roessingh, P. (1998) A gregarising factor present in the egg pod foam of the desert locust Schistocerca gregaria. J. Exp. Biol. 201, 347–363.CrossRefGoogle ScholarPubMed
Niassy, A., Torto, B., Njagi, P. G. N., Hassanali, A., Obeng-Ofori, D. and Ayertey, J. N. (1999) Intra- and interspecific aggregation responses of Locusta migratoria migratoriodes and Schistocerca gregaria and a comparison of their pheromone emissions, J. Chem. Ecol. 25, 1029–1042.CrossRefGoogle Scholar
Njagi, P. G. N., Torto, B., Obeng-Ofori, D. and Hassanali, A. (1996) Phase-independent responses to phase-specific aggregation pheromone in adult desert locust, Schistocerca gregaria (Forskål) (Orthoptera:Acrididae). Physiological Entomology 21, 131–137.CrossRefGoogle Scholar
Obeng-Ofori, D., Torto, B. and Hassanali, A. (1993) Evidence for mediation of two releaser pheromones in aggregation behaviour of the gregarious desert locust Schistocerca gregaria (Orthoptera: Acrididae). J. Chem. Ecol. 19, 1665–1676.CrossRefGoogle ScholarPubMed
Obeng-Ofori, D., Njagi, P. G. N., Torto, B., Hassanali, A. and Amiani, H. (1994a) Sex differentiation studies relating to releaser pheromones of the desert locust, Schistocerca gregaria (Forskål). Entomol. Exp. Appi. 73, 85–91.CrossRefGoogle Scholar
Obeng-Ofori, D., Torto, B., Njagi, P. G. N., Hassanali, A. and Amiani, H. (1994b) Fecal volatiles as part of the aggregation pheromone complex of the desert locust, Schistocerca gregaria (Forskål) (Orthoptera: Acrididae). J. Chem. Ecol. 20, 2077–2087.CrossRefGoogle ScholarPubMed
Ochieng, S. (1997) Odour detection in the desert locust S. gregaria: Antennai structure and function. PhD thesis, Lund University, Sweden, 113 pp.Google Scholar
Rai, M. M., Hassanali, A., Saini, R. K., Odongo, H. and Kahoro, H. (1997) Identification of components of the oviposition aggregation pheromone of the gregarious desert locust Schistocerca gregaria. J. Insect Physiol. 43, 83–97.CrossRefGoogle Scholar
Roessingh, P., Bouaïchi, A. and Simpson, S. S. (1998) Effects of sensory stimuli on the behavioural phase State of the desert locust, Schistocerca gregaria. J. Insect Physiol. 44, 883–893.CrossRefGoogle ScholarPubMed
Saini, R. K., Rai, M. M., Hassanali, A., Wawiye, J. and Odongo, H. (1995) Semiochemicals from froth of egg pods attract ovipositing female Schistocerca gregaria. J. Insect Physiol. 41, 711–716.CrossRefGoogle Scholar
Torto, B., Obeng-Ofori, D., Njagi, P. G. N., Hassanali, A., and Amiani, H. (1994) Aggregation pheromone system of adult gregarious desert locust, Schistocerca gregaria (Forskål) (Orthoptera: Acrididae). J. Chem. Ecol. 20, 1749–1762.CrossRefGoogle Scholar
Torto, B., Njagi, R. G. N., Hassanali, A. and Amiani, H. (1996) Aggregation pheromone system of nymphal gregarious desert locust, Schistocerca gregaria (Forskål) (Orthoptera:Acrididae). J. Chem. Ecol. 22, 2273–2281.CrossRefGoogle Scholar
Torto, B., Assad, Y. O. H., Njagi, P. G. N. and Hassanali, A. (1999) Evidence for additional pheromonal components mediating oviposition aggregation in Schistocerca gregaria (Forskål). J. Chem. Ecol. 25, 835–845.CrossRefGoogle Scholar