Evolution of cacao-pests over a six year period
1998
Moermans, R. | Casteels, H. | Van Hecke, P.
During a six year period (1991–1996) 284 cacao samples have been inspected for pests. Twenty six different taxa have been observed, but five of them represent 92% of the total population:Ahasverus advena, Carpophilus obsoletes, Cryptolestes ferrugineus, Ephestia cautella andTribolium castaneum. Over the total period, a trend cannot be shown neither in the number of pests nor in the number of taxa. The change of the composition of the population is mainly due to the substitution ofA. advena byC. ferrigineus and later byC. obsoletes. Both Hill’s indices are increasing during the first five years.
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