After discussion of the distribution of the insect and of its taxonomic classification, demonstrating the synonymy of S. hampei (Ferr.) and S. coffeae Haged., an attempt was made to analyse the factors playing a role in the epidemiology of the pest.Of climatic factors temperature favoured speed of development, slowing it down when the berries ripen and accelerating it after harvest, thus leading to a rapid exhaustion of available food supply. The rainfall distribution determined the growth cycle of the coffee berries and the relative humidity affected the incidence of fungal parasites of the beetle.The quantity of food available provided for the yearly fluctuations in attack. The suitability of the berries for food depended on their maturity, which could be distinguished by the beetle. Characteristics of the berries provided possible resistance factors.Of the predators man was the most important. Regular picking prevented the outbreak of an epidemic. The bionomics and importance of a hitherto unknown Bethylid parasite of the beetle, Cephalonomia stephanoderi Betrem, were given. The flight muscle degeneration in the adult female beetle was described.
|Qualification||Doctor of Philosophy|
|Award date||25 Oct 1961|
|Place of Publication||Wageningen|
|Publication status||Published - 1961|
- plant pests
- cote d'ivoire