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Understory influence on leafroller pupunations in Hawke's bay organic apple orchard

Rogers, D.J.; Walker, J.T.S.; Moen, I.C.; Weibel, F.; Lo, P.L. and Cole, L.M. (2003) Understory influence on leafroller pupunations in Hawke's bay organic apple orchard. In: Proceedings of 56th Conference of The New Zealand Plant Protection Society Incorporated (2003). [Unpublished]

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Summary

Leafrollers (Tortricidae) were collected from apple foliage and understorey vegetation in six commercial organic apple orchards in Hawke’s Bay over one season. Assessments were made of plant species present in the understorey at the time of collection. All leafroller larvae were reared to adults on artificial diet to identify leafroller species and parasitoids. Nearly half (47%) of all leafrollers collected in these orchards were located in the understorey, highlighting the importance of understorey and its management for the control of leafroller. Dock, clover and dandeliontype plants contributed 25% to the overall understorey, yet hosted 75% of the leafrollers collected from the understorey. Dolichogenidea sp. was the most abundant parasitoid (79%) attacking leafrollers found amongst the apple foliage, whereas Glyptapanteles demeter was dominant in the understorey (61%). Generally the number of leafrollers in an orchard was proportional to the abundance of broadleaf weeds and inversely proportional to parasitis.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:leafroller, Tortricidae, parasitism, understorey, apple, Bioobstbau
Subjects: Crop husbandry > Production systems > Fruit and berries
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crop Production
Related Links:http://www.fibl.org/forschung/anbautechnik-mehrjaehrig/index.php, http://www.hortnet.co.nz/publications/nzpps/
Deposited By: Weibel, Franco
ID Code:4863
Deposited On:03 Jun 2005
Last Modified:12 Apr 2010 07:31
Document Language:English
Status:Unpublished
Refereed:Not peer-reviewed

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