Ref ID: 10642
Ref Type: Journal
Authors: Elek, J. A., Steinbauer, M. J., Beveridge, N., and Ebner, P.
Pub Date: 2003
Journal Name: Agricultural and Forest Entomology
Volume: 5
Issue: 4
Start Page: 325
End Page: 332
ISBN/ISSN:
Keywords: Australia/Autumn Gum Moth/biodiversity/defoliation/development/efficacy/eucalypt/Eucalyptus/Eucalyptus globulus/Eucalyptus grandis/field/Geometridae/globulus/ground/gum/high/insecticide/instar/ITS/laboratory/larvae/Lepidoptera/management/Mnesampela/Mnesampela privata/mortality/moth/native/plantation/plantation eucalypt/plantations/response/Southern Australia/spray/tree/trees/trial/volume
Abstract: 1 The autumn gum moth Mnesampela privata (Guenée) (Lepidoptera: Geometridae, Ennominae) is a native moth that can outbreak, resulting in significant defoliation of plantation eucalypts in southern Australia. 2 Laboratory trials tested M. privata larvae for their dose–response to the ecdysone agonist, Mimic® 700 WP (a.i. 700 g/kg tebufenozide); ground and aerial field trials also tested its efficacy in eucalypt plantations. 3 The laboratory trials showed that there was no significant difference in mortality between larvae treated with 172 g Mimic® (120 g a.i)/ha and those sprayed with doses ranging from 86 to 3340 g Mimic®/ha. 4 Laboratory and field trials demonstrated that second instars were the most susceptible, with the most rapid response. However, second to fourth instars all reached 100% and fifth instars 90% mortality 3 weeks after aerial spraying at 120 g a.i./ha. 5 Aerial spraying an Eucalyptus globulus plantation with 120 g a.i. Mimic® at 20 L/ha caused 95% mortality of instars two to five, and 100% for instars two to four within 3 weeks after spraying. 6 Ground spraying to run-off with 120 g a.i. Mimic®/ha reduced defoliation of E. grandis from between 67% to 80% for unsprayed trees to 0% defoliation for sprayed trees. 7 The window for effective management of M. privata larvae is 3–5 weeks, during first to third instar development. 8 Replacement of broad-spectrum insecticides with the more target-specific Mimic® should increase the biodiversity of plantations and therefore would be more environmentally friendly
Notes: Entered by Martin Steinbauer (02/12/2003)
Reprint: Not in File
Program: SPF Resource Protection
Project: C2
Deliverable: C2-10
Confidentiality: Public
Availability: Authors
Report: Annual Report 2003/4
Type: Article
Address: martin.steinbauer@daff.gov.au
Misc 2: Published