Journal of Nematology (2004) 36, 329-330

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C. Leger, E. Riga and L. Lacey (2004)
Control of oriental fruit moth using entomopathogenic nematodes
Journal of Nematology 36 (3), 329-330
paper presented at the Society of Nematologists 43rd Annual Meeting, Estes Park, Colorado 7-11 August 2004
Abstract: The objective of this research was to evaluate the use of entomopathogenic nematodes (EPN) to control oriental fruit moth (Grapholita molesta), a serious pest of stone fruit. EPN are characterized by vector a pathogenic bacteria which kills the host within 24-48 h, showing considerable potential in biological control of insect pests. Early in the season, larvae bore into the tips of tender twigs while later the larvae bore into the fruit causing severe losses. Since control management have been based in the application of insecticides the population of OFM has developed resistance, which create the necessity of new alternative pest management strategies. The susceptibility of the OFM diapausing larvae to four species of EPN was evaluated in laboratory experiments using cocooned larvae inside cardboard strips. The EPN species tested were Steinernema carpocapsae, Steinernema feltiae, Heterorhabditis marelatus, and Heterorhabditis bacteriophora. Petri dishes contained 20 larvae of G. molesta were applied with concentrations of 5, 10 and 20 infective juveniles/cm2, and incubated for 48 h at 25 °C with five replications for each nematode species. All EPN species were effective in controlling OFM larvae. The preliminary results show that the most virulent EPN species is S. feltiae with high range of mortality 43-86%, and S. carpocapsae with 41-79 % at a concentration of 5 and 20 IJ's/cm2 respectively in both cases, followed by H. marelatus with 24-70 %, and H. bacteriophora with 5-32 % mortality. Further work is in the process to determinate the LC50 and LC95.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Lawrence A. Lacey, Ekaterini Riga

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Grapholita molesta
Heterorhabditis marelata (entomopathogen) Grapholita molesta
Steinernema carpocapsae/Xenorhabdus nematophila (entomopathogen) Grapholita molesta
Steinernema feltiae/Xenorhabdus bovienii (entomopathogen) Grapholita molesta