Evidence of superclones in Australian cotton aphid Aphis gossypii Glover (Aphididae: Hemiptera). Issue 8 (3rd January 2013)

• Record Type: Journal Article
• Authors: Chen, Yizhou; Vanlerberghe‐Masutti, Flavie; Wilson, Lewis J; Barchia, Idris; McLoon, Martin O; Smith, Tanya; Herron, Grant A
• Is Part Of: Pest management science. Volume 69:Issue 8(2013:Aug.)
• Page Start: 938
• Page End: 948
• Publication Date: 2013-01-03
• Subjects: Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.3455
• Languages: English
• ISSNs: 1526-498X

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <sec id="ps3455-sec-0001" sec-type="section"> <title>Background</title> <p> <bold> <italic>Aphis gossypii</italic> is an important pest of cotton that has developed resistance to many chemicals used for its control. Any lack of understanding of its genetic structure, resistance status and host plant specialisation hampers effective management</bold>.</p> </sec> <sec id="ps3455-sec-0002" sec-type="section"> <title>Rsults</title> <p> <bold>Eight microsatellite markers were genotyped for a collection of Australian <italic>A. gossypii</italic> field isolates from 55 plant species from major Australian cotton‐producing regions. The aphid's pirimicarb resistance status linked to the <italic>ACE1</italic> (acetylcholinesterase) S431F mutation was determined by PCR‐RFLP. Overall, the genetic diversity was low and there were only 13 multilocus genotype (MLG) groups found in a total of 936 aphids, suggesting asexual reproduction. Three MLGs (Aust‐01, Aust‐02 and Aust‐04) represented 78% of all aphids tested. MLGs Aust‐01 (41%) and Aust‐02 (18%) were linked to the <italic>ACE1</italic> S431F mutation and found on cotton and a range of hosts. Aust‐04 (19%) hosted mainly on cotton (but also Asteraceae and Malvaceae) was predominantly susceptible to pirimicarb. Given their abundance and widespread occurrence, these three clones were considered to be superclones</bold>.</p> </sec> <sec id="ps3455-sec-0003" sec-type="section"> <title>Conclusion</title> <p> <bold>The study demonstrated that any strategy to control <italic>A. gossypii</italic> and manage pirimicarb resistance should target <italic>A. gossypii</italic> strains of all MLG types residing on any plant species and not just cotton.© 2012 Society of Chemical Industry</bold> </p> </sec> </abstract>