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Laboratory Studies on the Effects of Flood on Egg Development, Survival and Hatchling Weight in Locusta Migratoria Migratorioides (Reiche and Fairmaire)

  • Joseph Bekae Ackonor
Research Article

Abstract

Laboratory studies were conducted on the role of flood on egg development, survival and hatchling weight in the solitary phase of Locusta Migratoria Migratorioides (Reiche and Fairmaire). Egg development is retarded by flood, particularly if the eggs develop for a long period in ordinary moist soil prior to flooding. Floods are also detrimental to egg survival; eggs that are flooded immediately after oviposition and those flooded when they are about to hatch are particularly susceptible. Egg age at flooding is a major determining factor of hatchling weight; heavier hatchlings are produced if eggs develop in ordinary moist soil for longer, rather than shorter, period before being flooded. Length of flooding period has no apparent effect on hatchling weight.

Key Words

Locusta migratoria migratorioides, egg development, egg survival, hatchling weight, flood, length of flooding period, egg age at flooding 

Résumé

Le rôle de l’inondation sur le development, la survie et le poids des larves a était étudié dans la phase solitaire de Locusta Migratoria Migratorioides (Reiche et Fairmaire). Le development de l’oeuf est rétardé par la fréquence de l’inondation particulièrement si les oeufs développent pour une plus longue période dans le sol normal et humide avant l’arrivé de l’inondation. Les inondations sont nuisibles à la survie de l’oeuf; les oeufs qui sont inondés aussitôt apprès l’oviposition et ceux qui sont inondés quand ils sont en train de faire éclore sont particulièrement sensibles. La période pendant lequel l’oeuf reste dans le sol normal et humide avant l’inondation est un facteur déterminant de premiere importance du poids de larve. Des larves qui sont plus lourdes sont produits si les oeufs développent dans le sol normal et humide pour une plus longue période avant ils se font inonder. La durée de l’nondation n’a aucune effet évident sur le poids des larves.

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Copyright information

© ICIPE 1989

Authors and Affiliations

  • Joseph Bekae Ackonor
    • 1
  1. 1.Organisation International Contre le Criquet Migrateur Africain (OICMA) MaiduguriNigeria

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