Acrida (1980) 9, 107-131
R.A. Cheke, L.D.C. Fishpool and G.A. Forrest (1980)
Oedaleus senegalensis (Krass)(Orthoptera: Acrididae: Oedipodinae): An account of the 1977 outbreak in West Africa and notes on eclosion under laboratory conditions
Acrida 9, 107-131
Abstract: In 1977 Oedaleus senegalensis (Krauss) occurred in very high numbers in West Africa causing considerable damage to extensive areas of millet crops in the Sahel zone. Details of the areas infested and the type of damage are given. Additional notes on variations in size of the adult grasshoppers and the proportions of their colour morphs during the course of the season are provided together with details of grasshopper behaviour and the ages of individuals caught at various sites. Experiments conducted on the hatching sequences of egg pods showed that all the eggs in a pod do not hatch simultaneously but that their eclosion is usually staggered over a period which may be more than 570 days. Some eggs hatched from pods which were at least 22 months old. These findings are discussed in the light of what is known about the species' ecology.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Robert A. Cheke
Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
environment - cropping system/rotation
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation
