Partial cold treatment of citrus fruit for export risk mitigation for Thaumatotibia leucotreta (Lepidoptera: Tortricidae) as part of a systems approach

Moore, Sean D; Kirkman, Wayne; Albertyn, Sonnica; Love, C N; Coetzee, Julie A; Hattingh, V

Title: Partial cold treatment of citrus fruit for export risk mitigation for Thaumatotibia leucotreta (Lepidoptera: Tortricidae) as part of a systems approach
Creator: Moore, Sean D
Creator: Kirkman, Wayne
Creator: Albertyn, Sonnica
Creator: Love, C N
Creator: Coetzee, Julie A
Creator: Hattingh, V
Subject: To be catalogued
Date Issued: 2016
Date: 2016
Type: text
Type: article
Identifier: http://hdl.handle.net/10962/423796
Identifier: vital:72094
Identifier: xlink:href="https://doi.org/10.1093/jee/tow138"
Description: Some of South Africa’s citrus export markets require mandatory postharvest cold treatment of citrus fruit as a phytosanitary risk mitigation treatment for Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae). An alternative to this may be partial cold treatment as one of the final steps in a systems approach to mitigate phytosanitary risk. Consequently, the efficacy of such partial cold treatments was evaluated. It was first determined that a 2C cold treatment was significantly more effective against fourth and fifth instars (the most cold-tolerant instars) than treatments at 3C and 4C for a duration of 18 d. Secondly, it was determined that 2C for 18 d and 1C for 16 d were similarly effective, but both treatments were significantly more effective than 1C for 14 d. Mean mortality of fourth and fifth instars treated with 2C for 18 d in seven replicates from four trials was 99.94%. Finally, it was determined that the inability of the majority of surviving larvae to develop to adulthood would further increase the efficacy of a 2C for 18 d treatment to 99.96%. Inclusion of reproductive nonviability of survivors increased mortality to 99.99%.
Format: computer
Format: online resource
Format: application/pdf
Format: 1 online resource (8 pages)
Format: pdf
Publisher: Oxford Academic Journals
Language: English
Relation: Journal of Economic Entomology
Relation: Moore, S.D., Kirkman, W., Albertyn, S., Love, C.N., Coetzee, J.A. and Hattingh, V., 2016. Partial cold treatment of citrus fruit for export risk mitigation for Thaumatotibia leucotreta (Lepidoptera: Tortricidae) as part of a systems approach. Journal of Economic Entomology, 109(4), pp.1578-1585
Relation: Journal of Economic Entomology volume 109 number 4 p. 1578 2016 1938-291X
Rights: Publisher
Rights: Use of this resource is governed by the terms and conditions of the Oxford Academic Journals Open Access Policy Statement (https://academic.oup.com/journals/pages/open_access)
Rights: Closed Access

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Coetzee, Julie A (Prof)

RU Department of Zoology and Entomology

RU DST/NRF SARChI for Insects in Sustainable Agricultural Ecosystems

RU Department of Botany

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