| Title: | Will Peri-Urban Cydia pomonella (Lepidoptera: Tortricidae) Challenge Local Eradication? |
| Author(s): | Horner R; Paterson G; Walker JTS; Perry GLW; Jaksons R; Suckling DM; |
| Address: | "The New Zealand Institute for Plant and Food Research Limited, Private Bag 4704, Christchurch Mail Centre, Christchurch 8140, New Zealand. The New Zealand Institute for Plant and Food Research Limited, Private Bag 1401, Havelock North 4172, New Zealand. School of Environment, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand. School of Biological Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand" |
| ISSN/ISBN: | 2075-4450 (Print) 2075-4450 (Electronic) 2075-4450 (Linking) |
| Abstract: | "Codling moth, Cydia pomonella (Lepidoptera: Tortricidae), is a phytosanitary pest of New Zealand's export apples. The sterile insect technique supplements other controls in an eradication attempt at an isolated group of orchards in Hawke's Bay, New Zealand. There has been no attempt in New Zealand to characterize potential sources of uncontrolled peri-urban populations, which we predicted to be larger than in managed orchards. We installed 200 pheromone traps across Hastings city, which averaged 0.32 moths/trap/week. We also mapped host trees around the pilot eradication orchards and installed 28 traps in rural Ongaonga, which averaged 0.59 moths/trap/week. In Hastings, traps in host trees caught significantly more males than traps in non-host trees, and spatial interpolation showed evidence of spatial clustering. Traps in orchards operating the most stringent codling moth management averaged half the catch rate of Hastings peri-urban traps. Orchards with less rigorous moth control had a 5-fold higher trap catch rate. We conclude that peri-urban populations are significant and ubiquitous, and that special measures to reduce pest prevalence are needed to achieve area-wide suppression and reduce the risk of immigration into export orchards. Because the location of all host trees in Hastings is not known, it could be more cost-effectively assumed that hosts are ubiquitous across the city and the area treated accordingly" |
| Keywords: | Cydia pomonella Malus domestica apple biosecurity eradication market access peri-urban pheromone trap public sterile insect technique suppression; |
| Notes: | "PubMed-not-MEDLINEHorner, Rachael Paterson, Georgia Walker, James T S Perry, George L W Jaksons, Rodelyn Suckling, David Maxwell eng Switzerland 2020/04/02 Insects. 2020 Mar 27; 11(4):207. doi: 10.3390/insects11040207" |
