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Insects 2014, 5(2), 319-331;

Rhagoletis cerasi: Oviposition Reduction Effects of Oil Products

Research Institute of Organic Agriculture (FiBL), Ackerstrasse 113, Postfach 219, CH-5070 Frick, Switzerland
Received: 24 December 2013 / Revised: 9 April 2014 / Accepted: 10 April 2014 / Published: 16 April 2014
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The European cherry fruit fly, Rhagoletis cerasi (L.) (Diptera: Tephritidae), is a highly destructive pest. Methods to control it are limited and alternatives are needed. Observations of cherry fruit flies suggest that females exert much effort to penetrate cherries at color change stage (from green to yellow) for oviposition. Therefore, the question arose as to whether a physical barrier on the fruit surface could reduce oviposition. The effects of different commercial horticultural oil products on R. cerasi oviposition were evaluated in a series of laboratory, semi-field and field experiments. In the laboratory experiments, the rate of successful oviposition on fruits treated with 0.25% v/v of the rapeseed oil product Telmion was significantly reduced by 90% compared to the untreated control. In semi-field experiments, deposits of 1% of rapeseed, mineral and paraffinic oil significantly reduced oviposition for up to 3 days. Semi-field experiments indicated that the oil products lose efficacy within 3 to 6 days after application due to degradation. Although treatments with the rapeseed oil product Telmion reduced infestation rates in an on-farm field experiment, the infested fruit clearly exceeded the level of market tolerance of 2%. Further research is needed to assess whether combinations of oil products, higher application rates and different formulations might improve field efficacy. View Full-Text
Keywords: Diptera; Tephritidae; organic agriculture; oviposition; behavior; horticultural oil; mineral oil Diptera; Tephritidae; organic agriculture; oviposition; behavior; horticultural oil; mineral oil

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Daniel, C. Rhagoletis cerasi: Oviposition Reduction Effects of Oil Products. Insects 2014, 5, 319-331.

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