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The effect of weaver ants Oecophylla smaragdina on the shoot borer Hypsipyla robusta on African mahoganies in Australia.

Peng, Renkang, Christian, Keith A. and Reilly, Don (2011). The effect of weaver ants Oecophylla smaragdina on the shoot borer Hypsipyla robusta on African mahoganies in Australia.. Agricultural and Forest Entomology,13(2):165-171.

Document type: Journal Article

IRMA ID 82057923xPUB21
Title The effect of weaver ants Oecophylla smaragdina on the shoot borer Hypsipyla robusta on African mahoganies in Australia.
Author Peng, Renkang
Christian, Keith A.
Reilly, Don
Journal Name Agricultural and Forest Entomology
Publication Date 2011
Volume Number 13
Issue Number 2
ISSN 1461-9555   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-79954594105
Start Page 165
End Page 171
Total Pages 7
Place of Publication United Kingdom
Publisher Wiley-Blackwell Publishing Ltd.
HERDC Category C1 - Journal Article (DIISR)
Abstract 1 African mahogany Khaya senegalensis is a high-value timber tree species widely grown in central Africa, south-east Asia and northern Australia. Pilot plantings show that the tree grows well in the wet-dry tropical areas of northern Australia, and the shoot borer Hypsipyla robusta (Lepidoptera: Pyralidae) is a potential pest of the tree. The weaver ant Oecophylla smaragdina is an efficient biocontrol agent in some horticulture crops. To investigate whether the ants control shoot borers, field experiments were conducted at two sites near Darwin, Australia from April 2006 to January 2009.

2 In the weaver ant treatments, the overall percentage of trees damaged by shoot borers was 0-2.7% at Berrimah Farm and 0-4.2% at Howard Springs, and the damaged trees were attacked once only. In the treatments without weaver ants, however, 9.9-52.1% trees were damaged at Berrimah Farm, and 6.3-64.6% at Howard Springs, and the damaged trees were generally attacked more than once.

3
At both sites, significantly fewer trees on each monitoring occasion were damaged in weaver ant treatments than in treatments without weaver ants.

4 The mean percentage of overall flushing shoots damaged by the pest at both sites was significantly lower in weaver ant treatments compared with treatments without weaver ants.

5 Fewer shoots were damaged per damaged tree in weaver ant treatments compared with treatments without weaver ants.

6 The data obtained suggest that weaver ants were effective biological control agents of the shoot borer, and that the ants can be used to manage the pest on African mahogany trees.
DOI http://dx.doi.org/10.1111/j.1461-9563.2010.00514.x   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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