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The African rice grasshopper, Hieroglyphus daganensis[1][2] is a medium-sized grasshopper species found in the Sahel region. Although not called a locust in English, this species shows gregarious behaviour and some morphological change (phase polymorphism) on crowding[3] and may become a moderately important pest species for small-holder farmers in the region.[4][5][6][7][8][9][10][11][12][13][14][15]

Hieroglyphus daganensis
Hieroglyphus daganensis couple.jpg
H. daganensis male & female
Scientific classification edit
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Orthoptera
Suborder: Caelifera
Family: Acrididae
Subfamily: Hemiacridinae
Genus: Hieroglyphus
Species:
H. daganensis
Binomial name
Hieroglyphus daganensis
Krauss, 1877
Synonyms

H. abbreviata Krauss, 1877

Contents

Description and BiologyEdit

AdultsEdit

The overall colour of adult insects is usually green, with a finely dotted shiny integument. Antennae are longer than the head and pronotum together. The pronotum is cylindrical, with three deep and wide sulci (grooves) crossing the dorsum.

HoppersEdit

 
Rice grasshopper nymphs in Mali, showing darkened coloration (on right) after crowding

The colour of immature insects may vary depending on their phase (illustrated right) during a particularly fertile year, dense populations of H. daganensis showed a distinct blackening in certain areas of cuticle.

Outbreaks and ControlEdit

Outbreaks are frequent in Sahelian countries such as Senegal, Mauritania, Burkina Faso, Mali, Niger and Benin.

A biological pesticide product called 'Green Muscle' is based on the entomopathogenic fungus (Metarhizium acridum) is now available (see desert locust). Early demonstrations of efficacy took place in northern Benin, with field tests by the LUBILOSA Programme on H. daganensis.

ReferencesEdit

  1. ^ Krauss (1877) Orthoptera von Senegal, gesammelt von Dr. Franz Steindachner, Sitzungsberichte der Österreichischen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Klasse (Abt. 1) (Sitz. öst. Akad. Wiss. Math-naturw. Kl. Abt. 1) 76(1):29-38
  2. ^ Roskov Y., Kunze T., Orrell T., Abucay L., Paglinawan L., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Decock W., De Wever A., Didžiulis V. (ed) (2011). "Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist". Species 2000: Reading, UK. Retrieved 24 September 2012.CS1 maint: Multiple names: authors list (link) CS1 maint: Extra text: authors list (link)
  3. ^ Uvarov, B.P. (1966). "Phase polymorphism". Grasshoppers and Locusts (Vol. 1). Cambridge University Press.
  4. ^ COPR (Centre for Overseas Pest Research) (1982) , The Locust and Grasshopper Agricultural Manual
  5. ^ Johnston, H.B. (1968) , Annotated catalogue of African grasshoppers, The Cambridge University Press, Cambridge Suppl:448 pp.
  6. ^ Johnston, H.B. (1956) , Annotated catalogue of African grasshoppers, The Cambridge University Press, Cambridge 833 pp.
  7. ^ Dirsh (1965) , The African Genera of Acridoidea, Cambridge University Press, Antilocust Centre, London 579 pp.
  8. ^ Mestre & Chiffaud (2006) , Catalogue et atlas des acridiens d'Afrique de l'Ouest
  9. ^ Descamps (1965) Acridoides du Mali (Deuxieme contribution). Regions de San et Sikasso (Zone soudanaise) (1 partie) et (2 partie), Bulletin de l'Institut Fondamental d'Afrique Noire (IFAN). Série A: Sciences Naturelles (Bull. IFAN (A)) 27:922-962, 1259-1314
  10. ^ Davey, Descamps & Demange (1959) Notes on the Acrididae of the French Sudan with special reference to the central Niger delta (I, II), Bulletin de l'Institut Fondamental d'Afrique Noire (IFAN). Série A: Sciences Naturelles (Bull. IFAN (A)) 21(1-2):60-112, 565-600
  11. ^ Descamps (1956) Insectes nuisibles au riz dans le Nord Cameroun, AgronomieTropicale (Nogent-sur-Marne) (Agron. Trop. (Nogent-sur-Marne)) 11:732-755
  12. ^ Kevan, D.K.M. (1956) Results from the Danish Expedition to the French Cameroons 1949-50: XV. Orthoptera: Acrididae, Bulletin de l'Institut Fondamental d'Afrique Noire (IFAN). Série A: Sciences Naturelles (Bull. IFAN (A)) 18(3):960-977
  13. ^ Popov, G.B. (1959) Some notes on injurious Acrididae (Orthoptera) in the Sudan-Chad area, Entomologist's Monthly Magazine, London (Ent. Monthly Mag.) 95:90-92
  14. ^ Mason, J.B. (1973) A revision of the genera Hieroglyphus Krauss, Parahieroglyphus Carl and Hieroglyphodes Uvarov (Orthoptera: Acridoidea), Bulletin of the British Museum (Natural History) Entomology (Bull. Br. Mus. (Nat. Hist.) Ent.) 28(7):507-560
  15. ^ Southcott (1994) A new larval erythraeine mite (Acari: Erythraeidae) from West Africa, International Journal of Acarology (Int. J. Acarology) 20(2):81-85

External linksEdit