ORBi: Attia Sabrine - Acaricidal activities of Santolina Africana and Hertia Cheirifolia, two endemic plants of north Africa, on the two spotted spider mite (Tetranychus urticae)

Reference : Acaricidal activities of Santolina Africana and Hertia Cheirifolia, two endemic plants o...


	Document type :	Scientific congresses and symposiums : Poster
	Discipline(s) :	Life sciences : Environmental sciences & ecology Life sciences : Entomology & pest control
	To cite this reference:	http://hdl.handle.net/2268/95638

Title :	Acaricidal activities of Santolina Africana and Hertia Cheirifolia, two endemic plants of north Africa, on the two spotted spider mite (Tetranychus urticae)
Language :	English
Author, co-author :	Attia, Sabrine [ > > ]
	Grissa, Kaouthar Lebdi [ > > ]
	Le Goff, Guillaume [ > > ]
	Lognay, Georges [Université de Liège - ULg > Chimie et bio-industries > Chimie analytique >]
	Heuskin, Stéphanie [Université de Liège - ULg > Chimie et bio-industries > Chimie analytique >]
	Mailleux, Anne-Catherine [ > > ]
	Hance, Thierry [ > > ]
Publication date :	May-2011
Peer reviewed :	Yes
Audience :	International
Event name :	7th Ecology and Behaviour Meeting
Event date :	2-6 Mai
Event organizer :	Société Écologique à Responsabilité Limitée & Université de Rennes 1
Event place (city) :	Rennes
Event country :	France
Keywords :	[en] 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.
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/95638

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