The coconut mite, Aceria guerreronis, in Benin and Tanzania

Author(s)
K. Negloh, R. Hanna, P. Schausberger
Abstract

The coconut mite Aceria guerreronis (Eriophyidae) is considered the most important pest of coconut fruits in Africa; however, quantitative knowledge about its distribution and abundance is lacking. We conducted four diagnostic surveys-three in Southern Benin and one along the coast of Tanzania-to determine the distribution of A. guerreronis and the severity of its damage to coconut fruits, as well as the diversity and abundance of other associated mites and potential natural enemies. Aceria guerreronis was found in all visited plantations with the percentage of damaged fruits varying considerably among plantations-67-85% in Benin and 43-81% in Tanzania. Overall, 30-40% of the fruit surfaces were damaged by A. guerreronis. Damage severity increased with fruit age and negatively affected fruit weight of 7- to 12-months-old fruits. Aceria guerreronis was by far the most abundant mite on coconut fruits but its abundance depended on fruit age. The highest densities of A. guerreronis were observed on 3- to 4-months-old fruits. Neocypholaelaps sp. (Ameroseiidae) was the most abundant mite on inflorescences. Three species of predatory mites (Phytoseiidae)-Neoseiulus baraki, N. neobaraki and N. paspalivorus-were the most commonly found predatory mites beneath the coconut bracts in association with A. guerreronis. Neoseiulus neobaraki was the prevailing predator in Tanzania while N. paspalivorus was the most frequent predator in Benin. Other mites found beneath the bracts were the herbivore Steneotarsonemus furcatus (Tarsonemidae) and the detritivore and fungivore Tyrophagus putrescentiae (Acaridae).

Organisation(s)
External organisation(s)
Int Inst Trop Agr, Biol Control Ctr Afr, Universität für Bodenkultur Wien
Journal
Experimental & Applied Acarology
Volume
55
Pages
361-374
No. of pages
14
ISSN
0168-8162
DOI
https://doi.org/10.1007/s10493-011-9474-0
Publication date
12-2011
Peer reviewed
Yes
Austrian Fields of Science 2012
401112 Plant protection, 106003 Biodiversity research, 106030 Plant ecology, 106047 Animal ecology
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/the-coconut-mite-aceria-guerreronis-in-benin-and-tanzania(6d1ae4eb-b515-4c27-84a8-3247f9169d93).html