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Descriptions and morphometrics of the nymphs of Zonocerus variegatus (L.) (Orthoptera: Acridoidea)

Published online by Cambridge University Press:  10 July 2009

R. F. Chapman ,
A. G. Cook ,
G. A. Mitchell  and
W. W. Page
R. F. Chapman
Affiliation:
Centre for Overseas Pest Research, College House, Wrights Lane, London W8 5SJ, U.K.
A. G. Cook
Affiliation:
Centre for Overseas Pest Research, College House, Wrights Lane, London W8 5SJ, U.K.
G. A. Mitchell
Affiliation:
Centre for Overseas Pest Research, College House, Wrights Lane, London W8 5SJ, U.K.
W. W. Page
Affiliation:
Centre for Overseas Pest Research, College House, Wrights Lane, London W8 5SJ, U.K.
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Abstract

Abstract

The nymphal instars of Zonocerus variegatus (L.) are described from insects collected near Ibadan, Nigeria. Most insects reared in the laboratory passed through six nymphal instars, although more had only five nymphal instars when reared in crowded conditions. The proportions with five or six instars were not altered by different food-plants. Femur length, head width and pronotal length of laboratory-reared insects were measured. The sizes were only slightly affected by food-plants; they fall into fairly discrete classes corresponding with each instar. The form of antennae, genitalia and wing pads in successive instars is also described. The early-instar nymphs are almost entirely black, with a few yellow markings. In later instars, the extent of the yellow increases. Field data from insects collected during the dry season can be interpreted on the basis of the laboratory studies and indicate that most insects in the field pass through six nymphal instars. More data are needed before nymphs collected in the wet season can be characterised with certainty.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 67 , Issue 3 , September 1977 , pp. 427 - 437
Copyright
Copyright © Cambridge University Press 1977

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References

Albrecht, F.. (1955). La densité des populations et la croissance chez Schistocerca gregaria Forsk. et Nomadacris septemfasciata (Sev.); la mue d'adjustement.— J. Agric. trop. Bot. appl. 2, 109–192.Google Scholar
Anya, A. O.. (1973). Ecology of the variegated grasshopper, Zonocerus variegatus, (Orthoptera: Acridoidea, Pyrgomorphidae) on the Nsukka Plateau, Nigeria.— Entomologia exp. appl. 16, 64–76.CrossRefGoogle Scholar
Barnes, O. L.. (1955). Effect of food plants on the lesser migratory grasshopper.— J econ Ent. 48, 119–124.CrossRefGoogle Scholar
Bernays, E. A.. &Chapman, R. F.. (1973). The role of food plants in the survival and development of Chortoicetes terminifera (Walker) under drought conditions.— Aust. J. Zool. 21, 575–592.CrossRefGoogle Scholar
Bernays, E. A.., Chapman, R. F.., Cook, A. G.., McVeigh, L. J.. &Page, W. W.. (1975). Food plants in the survival and development of Zonocerus variegatus (L.).— Acrida. 4, 33–45.Google Scholar
Dirsh, V. M.. (1953). Morphometrical studies on phases of the desert locust (Schistocerca gregaria Forskål).— Anti-Locust Bull. no. 16, 34 pp.Google Scholar
Gillon, Y.. (1974). Reconnaissance des jeunes acridiens de la mosaïque forêt-savane (Côte d'Ivoire).— Annls Univ. Abidjan. (E) 7, 453–531.Google Scholar
Golding, F. D.. (1940). Notes on the variegated grasshopper, Zonocerus variegatus L., in Nigeria.— Bull. ent. Res. 30, 543–550.CrossRefGoogle Scholar
Jerath, M. L.. (1965). Note on the biology of Zonocerus variegatus (L.) from Eastern Nigeria.— Revue Zool. Bot. afr. 72, 243–251.Google Scholar
Jerath, M. L.. (1968). Notes on the biology of some short-horned grasshoppers from Eastern Nigeria (Orthoptera: Acridoidea).— Proc. R. ent. Soc. Lond. (A) 43, 27–38.Google Scholar
Kaufmann, T.. (1965). Observations on aggregation, migration and feeding habits of Zonocerus variegatus in Ghana (Orthoptera: Acrididae).— Ann. ent. Soc. Am. 58, 426–436.CrossRefGoogle Scholar
Taylor, T. A.. (1972). On the origin of the wet-season form of Zonocerus variegatus (L.) (Orth., Acrididae) in southern Nigeria, with some biological notes.— Bull. ent. Res. 61, 661–667.CrossRefGoogle Scholar
Toye, S. A.. (1971). Notes on the biology of Zonocerus variegatus (L.) (Orthoptera, Acridoidea) in the Western State of Nigeria.— Revue Zool. Bot. afr. 84, 384–392.Google Scholar
Toye, S. A.. (1973). Effects of food on the development of the desert locust, Schistocerca gregaria (Forskål).— J. Ent. (A) 48, 95–102.Google Scholar
Toye, S. A.. (1974). Feeding and locomotory activities of Zonocerus variegatus (L.) (Orthoptera. Acridoidea).— Revue zool. afr. 88, 205–212.Google Scholar
Uvarov, B.. (1966). Grasshoppers and locusts. Volume 1.— 481 pp. London, Cambridge University Press.Google Scholar
Vuillaume, M.. (1953). Biologie et comportement en A.O.F., de Zonocerus variegatus. Doctoral thesis, Faculté des Sciences, Univ. Paris.Google Scholar
Vuillaume, M.. (1954). Etude du cycle du Zonocerus variegatus en basse Côte d'lvoire.— Fruits d'outre mer. 9, 147–156.Google Scholar