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The Chemical ecology of the oriental fruit fly Bactrocera dorsalis and the potential for novel odor-based management tools

Biasazin, Tibebe Dejene (2017). The Chemical ecology of the oriental fruit fly Bactrocera dorsalis and the potential for novel odor-based management tools. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2017:62
ISBN 978-91-7760-014-5
eISBN 978-91-7760-015-2
[Doctoral thesis]

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Abstract

Over the last few years, several tephritid species have invaded sub-Saharan Africa, competitively displacing native fruit fly pests, and severely affecting horticulture production. In two different farming scales, small and large, we verified the influence of suppressing the invasive Bactrocera dorsalis using the male specific attractant, methyl eugenol (ME), formulated in SPLAT-spinosad. In small-scale farm plots, use of ME did reduce B. dorsalis populations, but population levels remained high throughout the study. In mark-release-recapture studies, male flies were found to disperse fast and beyond one km from the release point. In large-scale farm plots, the invasive pest was controlled within eight months of suppression using ME-based suppression in combination with other pest management techniques. However, this was paralleled by a quick resurgence of the native fruit fly Ceratitis capitata, likely due to competition release. Targeting female fruit flies using techniques that rely on the olfactory sensitivity of the flies, may support direct and more selective ways to control fly populations. Host fruits, as well as proteins produced during fermentation, are important resources for tephritid fruit fly nutrition and reproduction. This study used gas chromatography-coupled electroantennography detection (GC-EAD) to test the physiological response of economically important tephritid pest species to host fruits and commercially available food-baits. This was compared to the published database of odorant receptors of Drosophila melanogaster. We postulated that volatiles shared across fruits and detected by several fly species may comprise general fruit compounds important in host orientation. Selected blends, composed of 6 or 11 fruit compounds were more attractive to B. dorsalis than full fruit odor in a multi-choice olfactometer assay. Species-specific and general blends identified from food-baits were more attractive to B. dorsalis. The study underlines the potential of a comprehensive database of olfactory sensitivity in the rational design of novel synthetic attractants, or for augmenting existing ones. The study also provides a platform to develop both species-specific attractants and multi-species attractants for tephritid fruit flies.

Keywords: Bactrocera dorsalis, food-baits, fruit volatiles, GC-EAD, male lures, olfactometer, Tephritidae

Authors/Creators:Biasazin, Tibebe Dejene
Title:The Chemical ecology of the oriental fruit fly Bactrocera dorsalis and the potential for novel odor-based management tools
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ባለፉት ጥቂት አመታት ውስጥ በርካታ መጤ የፍራርፍሬ ወጊ ዝንብ ዝርያዎች ከሰሀራ በታች አፍሪካን በመውረር በአትክልትና ፍራፍሬ ምርት ላይ ከፍተኛ ተጽእኖ አሳድረዋል። ከነዚህ የፍራፍሬ ዝንብ አይነቶች እንዱ እና ዋነኛው “ባክትሮሴራ ዶርሳሊስ” በመባል የሚታወቀው ምንጩ ከኢሺያ የሆነ በአጭር ጊዜ ውስጥ ኢትዮጵያን ጨምሮ በመላው አፍሪካ በመሰራጨት በተለያዩ አይነት ፍራፍሬዎች ላይ ጉዳት በማድረስ ላይ ያለ ነፍሳት ነው። በዚህ የከፍተኛ ትምህርት ጥናት ወንዱን የፍራፍሬ ዝንብ ብቻ ለይቶ ወደ መግደያ ወጥመድ በመዐዛው የሚስብ “ሜታይል ኢዩጅኖል” የተባለን ኬሚካዊ ንጥረ ነገር “ስፒኖሳድ” ከተባለ መርዛማ ቅመም እንዲሁም “ስፕላት” ከተባለ የምግብነት ባህሪ ካለው ውህድ ጋር በመደባለቅ፥ የውህዱ ዝንቦቹን የመቆጣጠር ተጽእኖ ኢትዮጵያ ውስጥ በሚገኙ ሰፋፊ እርሻዎች እና አነስተኛ የገበሬ ማሳዎች ላይ ተሞክሯል። በአነስተኛ የገበሬ ማሳዎች ላይ ምንም እንኳን የፍራፍሬ ዝንቦቹ መጠን ቀድሞ ከነበረበት ከፍተኛ መጠን በትንሹ ቢቀንስም በፍራፍሬዎች ላይ የሚታየው ጉዳት ግን ለውጥ አላሳየም። የዝንቦቹ በፍጥነት ካንድ የገበሬ ማሳ ወደ ሌላ ማሳ መብረር መቻል ቁጥጥሩን አስቸጋሪ አድርጎታል። በሰፋፊ እርሻ ላይ በተደረገው ጥናት በ ስምንት ወር ውስጥ መጤውን የፍራፍሬ ዝንብ መቆጣጠር ቢቻልም፥ የመጤው ፍራፍሬ ዝንብ ዝርያ እንደቀነሰ ነባር የፍራፍሬ ዝንቦች ባዲስ መልክ ማሳውን በመውረራቸው በፍራፍሬ ላይ የሚደርሰው ጉዳት አሁንም ቀጥሏል። ለዚህም መፍትሄ ይሆን ዘንድ፥ ብዙ አይነት የፍራፍሬ ዝንቦች ባሉበት ማንኛውም ማሳ ላይ ሌሎችንም አይነት የዝንብ ዝርያዎች በመዐዛቸው ወደ መግደያ ወጥመድ የሚስቡ እና የሚገሉ ውህዶችን መጠቀም እንዲሁም ደሞ ቁጥጥሩን ከተወሰኑ የገበሬ ማሳዎች ከፍ በማድረግ ሀገር አቀፍ እንዲሁም አህጉር አቀፍ የቁጥጥር ዘዴ እንዲመቻች ማድረግ ያስፈልጋል። በተጨማሪም ይህን ጉዳት ቀጥተኛ በሆነ መንገድ ለመቆጣጠር የሴት ፍራፍሬ ወጊ ዝንቦችን ዒላማ ማድረግ ጥቅሙ ከፍተኛ ነው። በዚህ ጥናት ሴቶች ዝንቦችን ወደ ፍራፍሬዎች እንዲሁም ወደተለያዩ የ ዝንብ ምግቦች የሚስቧቸውን ከመቶ በላይ የሆኑ መዐዛማ ንጥረ ነገሮች “ጂሲ-ኢኤዲ እና ጂሲ-ኤምኤስ” የተባሉ መሳሪያዎችን እገዛ ተጠቅሜ ለይቻለሁ። ከነዚህም ውስጥ የተወሰኑትን፥ በተለያዩ ፍራፍሬዎች ውስጥ የሚገኙትንና፥ ሌሎች የፍራፍሬ ዝንብ ዝርያዎችም ያሸተቷቸውን መዐዛማ ንጥረ ነገሮች በመጠቀም የሰራሁት ውህድ በቤተ ሙከራ ውስጥ “ባክትሮሴራ ዶርሳሊስን” እንዲሁም ሌሎች ዝርያዎችን ወደ መግደያ ወጥመድ በመሳብ አመርቂ ውጤት አስገኝቷል።
ቁልፍ ቃላት: ባክትሮሴራ ዶርሳሊስ, ሜታይል ኢዩጅኖል, አነስተኛ የገበሬ ማሳ, የፍራፍሬ መዐዛ, ጂሲ-ኢኤዲ, ጂሲ-ኤምኤስ

Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :26 September 2017
Depositing date:26 September 2017
Volume:2017:62
Number of Pages:52
Papers/manuscripts:
NumberReferences
ITibebe Dejene Biasazin, Tadiwos Woldehana, Sebastian Larsson Herrera, Mattias Larsson, Agenor Mafra-Neto, Teun Dekker. The impact of odorbased management techniques in suppressing the invasive fruit fly pest (Bactrocera dorsalis) in large-scale and small-scale orchards in Ethiopia. (Manuscript)
IITibebe Dejene Biasazin, Miriam Frida Karlsson, Ylva Hillbur, Emiru Seyoum, Teun Dekker (2014). Identification of host blends that attract the African invasive fruit fly, Bactrocera invadens. Journal of Chemical Ecology 40, 966-976.
IIITibebe Dejene Biasazin, Sebastian Larsson Herrera, Teun Dekker. Fruitodor olfactomes of four tephritid pests and their use in the rational design of novel female attractants. (Manuscript)
IVTibebe Dejene Biasazin, Haimanot Teklemariam, Sebastian Larsson Herrera, Marie Bengtsson, Miriam Frida Karlsson, Joelle Kristin Lechelt, Teun Dekker. Deconstructing protein-based lures into synthetic compounds to create attractive blends for tephritid fruit flies. (Manuscript)
Place of Publication:Alnarp
Publisher:Department of Plant Protection Biology, Swedish University of Agricultural Sciences.
ISBN for printed version:978-91-7760-014-5
ISBN for electronic version:978-91-7760-015-2
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:H Protection of plants and stored products > H01 Protection of plants - General aspects
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Other Agricultural Sciences not elsewhere specified
Agrovoc terms:bactrocera dorsalis, baits, host plants, male animals, attractants, fruit damaging insects, gas chromatography, volatilization, smell, tephritidae
Keywords:Bactrocera dorsalis,, food-baits, fruit volatiles, GC-EAD, male lures, olfactometer, Tephritidae
URN:NBN:urn:nbn:se:slu:epsilon-e-4379
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4379
ID Code:14581
Faculty:LTJ - Faculty of Landscape Planning, Horticulture and Agricultural Science (until 2013)
Department:(LTJ, LTV) > Department of Plant Protection Biology
Deposited By: Tibebe Dejene /TD Biasazin
Deposited On:27 Sep 2017 08:14
Metadata Last Modified:27 Sep 2017 08:14

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