Potential impact of the leaf-cutting ant Acromyrmex lobicornis on conifer plantations in northern Patagonia, Argentina
Article first published online: 19 DEC 2010
© 2010 The Authors. Agricultural and Forest Entomology © 2010 The Royal Entomological Society
Agricultural and Forest Entomology
Volume 13, Issue 2, pages 191–196, May 2011
How to Cite
Paola Pérez, S., Carlos Corley, J. and Farji-Brener, A. G. (2011), Potential impact of the leaf-cutting ant Acromyrmex lobicornis on conifer plantations in northern Patagonia, Argentina. Agricultural and Forest Entomology, 13: 191–196. doi: 10.1111/j.1461-9563.2010.00515.x
- Issue published online: 11 APR 2011
- Article first published online: 19 DEC 2010
- Accepted 8 August 2010, First published online 19 December 2010
- foraging preferences;
- forest pests;
- Pinus spp
- 1The economic losses associated with crop damage by invasive pests can be minimized by recognizing their potential impact before they spread into new areas or crops.
- 2We experimentally evaluated the preferences of the leaf-cutting ant Acromyrmex lobicornis (Hymenoptera: Formicidae) for the most common conifer species commercially planted in northern Patagonia, Argentina. The areas of potential forest interest in this region and the geographical range of this ant overlap. We performed field preference tests and monitored the level of ant herbivory on planted conifer seedlings next to nests.
- 3Acromyrmex lobicornis preferred some conifer species and avoided foraging on others. Pseudotsuga menziesii and Austrocedrus chilensis were the less preferred species, Pinus ponderosa and Pinus contorta were the most preferred by A. lobicornis.
- 4The item mostly selected by ants was young needles from P. contorta. This species was also the pine mostly defoliated. Seedlings without ant-exclusion showed a mean±SE of 60±5% defoliation during the sampling period. Pinus ponderosa was less defoliated; control seedlings showed a mean±SE of 8.5±1% of leaf damage in the sampling period.
- 5The present study shows how the use of simple field tests of leaf-cutting ant preferences could allow an improved selection of appropriate conifer species for future plantations in areas where leaf-cutting ants are present.