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Poster (Scientific congresses and symposiums)
Acaricidal activities of Santolina Africana and Hertia Cheirifolia, two endemic plants of north Africa, on the two spotted spider mite (Tetranychus urticae)
Attia, Sabrine; Grissa, Kaouthar Lebdi; Le Goff, Guillaume et al.
20117th Ecology and Behaviour Meeting
 

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Keywords :
SANTOLINA AFRICANA; Tetranychus urticae; Hertia Cheirifolia; essential oils
Abstract :
[en] The two-spotted spider mite, Tetranychus urticae Koch, is a worldwide pest which feeds on a large variety of plant families. Because its resistance to acaricides is spreading rapidly, the development of new biological control tactics for population management is crucial. Plant extracts, such as Santolina africana and Hertia cheirifolia (Asteraceae), may represent viable alternatives, since they are currently considered to be minimumrisk pesticides. Although these two plants are known for their biocidal properties, the extract concentration that provides the most efficient control has not yet been precisely determined. In this study, we conducted a series of laboratory experiments to determine the susceptibility of adult females to different concentrations of S. africana and H. cheirifolia extract. These plants were steam-distilled and sprayed using a Potter spray tower. Mortality and fecundity were measured upon treatment with extract concentrations ranging from 0.07 to 6.75 mg/L. Female mortality increased with concentration, with LD50 values of 2.35 mg/L for S. africana and 3.43 mg/L for H. cheirifolia, respectively Reduced fecundity was previously observed at concentrations of 0.07, 0.09 and 0.29 mg/L .The chemical composition of the two oils were characterised by GC-MS. The most abundant components of the S. africana oil were terpinen-4-ol (44%), α- terpineol (11.31%) and borneol (6.73%). Camphor (15.11%), terpinen-4-ol (14.2%), α- terpineol (9.3%) were characteristic of the Hertia oil.
Disciplines :
Environmental sciences & ecology
Entomology & pest control
Author, co-author :
Attia, Sabrine
Grissa, Kaouthar Lebdi
Le Goff, Guillaume
Lognay, Georges ;  Université de Liège - ULiège > Chimie et bio-industries > Chimie analytique
Heuskin, Stéphanie ;  Université de Liège - ULiège > Chimie et bio-industries > Chimie analytique
Mailleux, Anne-Catherine
Hance, Thierry
Language :
English
Title :
Acaricidal activities of Santolina Africana and Hertia Cheirifolia, two endemic plants of north Africa, on the two spotted spider mite (Tetranychus urticae)
Publication date :
May 2011
Event name :
7th Ecology and Behaviour Meeting
Event organizer :
Société Écologique à Responsabilité Limitée & Université de Rennes 1
Event place :
Rennes, France
Event date :
2-6 Mai
Audience :
International
Available on ORBi :
since 15 July 2011

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