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Role of semiochemical in host finding, oviposition and sexual communication in Guatemalan potato moth Tecia solanivora

Karlsson, Miriam Frida (2011). Role of semiochemical in host finding, oviposition and sexual communication in Guatemalan potato moth Tecia solanivora. Diss. (sammanfattning/summary) Alnarp, Sweden : Sveriges lantbruksuniv., ; 2011:55
ISBN 978-91-576-7599-6
[Doctoral thesis]

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Abstract

Semiochemicals are important cues in the interaction between plant and insects and between conspecific insects. Volatile compounds emitted by plants provide herbivorous insects with cues for host finding, selection and discrimination. In moths, female emitted sex pheromones enable conspecific males to find them for mating. This thesis investigated the role of semiochemicals in the behaviour of the Guatemalan potato moth Tecia solanivora (Lepidoptera: Gelechiidae), a pest insect of potato.

Identification of odours of foliage, flowers, and tubers of potato, Solanum tuberosum, were done with coupled gas chromatography-mass spectrometry and with high-performance liquid chromatography for non-volatile compounds in tubers. Antennal activity of potato volatiles was tested with electroantennographic recordings. Attraction of T. solanivora to potato volatile compounds was investigated through olfactometer, wind tunnel and field bioassays. Male behavior towards two different synthetic pheromone blends was similarly tested, to clarify their mode of action in mating disruption management.

Potato emits structure-specific volatile blends that change during the development of the plant. Tuberization stage was the preferred stage for oviposition while foliage released deterrent compounds. A three-component flower-odour mimic attracted males and females, virgin and mated, and enhanced the number of eggs laid. Female oviposition in the soil, during the tuberization stage might be guided by odours from spatially separated flowers, as an indication of suitable host vicinity. Larval survival was low in tubers with high concentrations of glycoalkaloids. This study demonstrates that odours from qualitatively different sites guide female to oviposit on tubers with high suitability for larval performance. Mating disruption was obtained with pheromone-permeated air with the two blends, but the disruption mechanism were different between them.

This first study on chemical communication between T. solanivora and its host plant showed that potato volatile compounds are perceived by the moth and act as cues in host location and oviposition. It highlights the possibility of using semiochemicals to manipulate the behavior of the moths and provides a base for further investigation and development of odour-based pest management.

Authors/Creators:Karlsson, Miriam Frida
Title:Role of semiochemical in host finding, oviposition and sexual communication in Guatemalan potato moth Tecia solanivora
Series/Journal:Acta Universitatis agriculturae Sueciae
Year of publishing :May 2011
Volume:2011:55
Number of Pages:58
Papers/manuscripts:
NumberReferences
IKarlsson M.F., Birgersson G., Cotes A.M., Bosa C.F., Bengtsson M., Witzgall P. (2009). Plant odor analysis of potato: response of Guatemalan moth to above- and belowground potato volatiles. Journal of Agricultural Food and Chemistry 57(13), 5903-5909
IIKarlsson Miriam Frida, Göran Birgersson, Peter Witzgall, Jonas D. Stevens-Lekfeldt, Nimal Punyasiri and Marie Bengtsson Guatemalan potato moth Tecia solanivora distinguish odour profiles from qualitatively different potatoes Solanum tuberosum L. (manuscript)
IIIKarlsson Miriam Frida, Magali Proffit, and Göran Birgersson. Flower volatiles assist host-plant location in the Guatemalan potato moth Tecia solanivora (manuscript)
IVClavijo Mc Cormick Andrea, Miriam Frida Karlsson, Carlos Felipe Bosa Ochoa, Magali Proffit, Maria Victoria Zuluaga, Alba Marina Cotez Prado, and Peter Witzgall. Mechanisms of mating disruption for two synthetic pheromone blends of the Guatemalan potato moth Tecia solanivora (Povolny) (manuscript)
Place of Publication:Alnarp, Sweden
Publisher:Dept. Plant Protection Biology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-7599-6
ISSN: 1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:H Protection of plants and stored products > H10 Pests of plants
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Behavioural Sciences Biology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Agrovoc terms:gelechiidae , pests of plants, solanum tuberosum, chemical composition, sex pheromones, sexual behaviour, mating disruption, smell
Keywords:Gelechiidae, Solanum tuberosum , electrophysiology, chemical analysis, host-plant cues, behaviour, attraction, mating disruption
URN:NBN:urn:nbn:se:slu:epsilon-e-94
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-94
ID Code:8121
Department:(LTJ, LTV) > Department of Plant Protection Biology
External funders:Swedish International Development Cooperation Agency
Deposited By: Miriam Frida Karlsson
Deposited On:12 May 2011 07:59
Metadata Last Modified:02 Dec 2014 10:46

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