Wild olive seed weevil, Anchonocranus oleae Marshall (Coleoptera: Curculionidae), in cultivated olives in South Africa

Authors

DOI:

https://doi.org/10.17159/2254-8854/2023/a15285

Keywords:

oviposition damage, African wild olive, feeding damage, Olea europaea L. subsp. cuspidata, Olea europaea subsp. europaea

Abstract

Wild olive seed weevil, Anchonocranus oleae Marshall, larvae as well as oviposition and feeding damage were recorded in cultivated olives during a recent study on olive seed wasps. Prematurely dropped fruit and fruit picked at harvest in two orchards near Stellenbosch and Agter-Paarl were examined regularly for olive seed wasp infestation over three seasons. In addition, olives were collected in the olive growing regions of the Western Cape province for a survey to determine olive seed wasp distribution. DNA barcoding was used to confirm the identity of weevil larvae in kernels. The number of A. oleae larvae found in olive seeds and the number of olives with weevil oviposition or feeding damage in this study were low. The presence of larvae and weevil damage in two orchards in the survey with no wild olive trees in close proximity suggest that the weevil could breed and persist in cultivated olive orchards. Currently A. oleae is not of economic concern, but if infested olives are discarded at harvest and left in orchards, the weevils could complete their development in the kernels and numbers could eventually increase to damaging levels.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

Allsopp E, Knipe M, van Asch B, Caleca V. 2021. Eupelmus spermophilus Silvestri (Hymenoptera: Chalcidoidea), an indigenous olive seed wasp potentially harmful to olive growing in the Western Cape, South Africa. African Entomology 29: 180–189. https://doi.org/10.4001/003.029.0180

Caleca V, Giacalone C, Allsopp E, Costa C, Tortorici F, Laudonia S, van Asch B, Colonnelli E. 2019. Wild olive seed weevil in South Africa, Anchonocranus oleae Marshall (Coleoptera: Curculionidae), a rediscovery after a century. IOBC-WPRS Bulletin 141: 132–136.

Marshall GAK. 1912. On a new species of Curculionidae injurious to olives in South Africa. Bollettino del Laboratorio di Zoologia Generale e Agraria della R. Scuola Superiore d’Agricoltura in Portici 6: 3–4.

Mkize N, Hoelmer KA, Villet MH. 2008. A survey of fruit-feeding insects and their parasitoids occurring on wild olives, Olea europaea ssp. cuspidata, in the Eastern Cape of South Africa. Biocontrol Science and Technology 18(9–10): 991–1004.

Neuenschwander P. 1982. Searching parasitoids of Dacus oleae (Gmel.) (Dipt., Tephritidae) in South Africa. Zeitschrift für Angewandte Entomologie 94: 509–522.

Silvestri F. 1915. Contributo alla conoscenza degli insetti dell’olivo dell’Eritrea e dell’Africa meridionale. Bollettino del Laboratorio di Zoologia Generale e Agraria della Reale Scuola Superiore d’Agricoltura, Portici 9: 240–334.

Smit SJ, Allsopp E, Nethavhani Z, Caleca V, Oberprieler RG, van Asch B. 2022. Mitogenomics of the olive seed weevil, Anchonocranus oleae Marshall and implications for its phylogenetic position in Curculionidae. Insects 13, 607. https://doi.org/10.3390/insects13070607

Downloads

Published

2023-07-25

How to Cite

1.
Allsopp E, Knipe MC, van Asch B, Caleca V. Wild olive seed weevil, Anchonocranus oleae Marshall (Coleoptera: Curculionidae), in cultivated olives in South Africa. Afr. Entomol. [Internet]. 2023 Jul. 25 [cited 2024 Feb. 28];31. Available from: https://www.africanentomology.com/article/view/15285

Issue

Section

Articles