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Elaboration of a strategy to control the peach twig borer Anarsia lineatella Zeller in the Sefrou region in Morocco

Adil Asfers1*, Abdelali Blenzar1, Mohammed Rachdaoui2, Abdelmalek Boutaleb Joutei2,
Abdelhadi Ait Houssa3, Ahmed Sekkat2

1 Department of Biology, Meknes Faculty of Sciences, Moulay Ismail University, P.O. Box 11201, Zitoune Meknes, Morocco

2 National School of Agriculture, Meknes, 50001 Meknes, P.O. Box S/40, Morocco

3 Louata Farm-Providence Verte Group, Sefrou region, P.O. Box 4, Morocco

*Corresponding address:
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Received: July 30, 2016
Accepted: November 18, 2016

Abstract: Trapping by specific sex pheromones initiated in 2009 to monitor three pests, peach twig borer (Anarsia lineatella), oriental fruit moth (Cydia molesta) and plum fruit moth (Grapholita funebrana) revealed the greater importance of peach twig borer in comparison to the others. The results of monitoring the development of larval stages over time and the accumulated degree-days from biofix show that the pest develops five generations per year, one of which undergoes a diapause. In 2009 and 2010 chemical control based on tolerance threshold of 10 males/trap/2 weeks showed unsatisfactory results. With this method, the percentage of affected fruits increased from 6.8% in 2009 to 18.6% in 2010 despite the application of four treatments of organophosphate-based insecticides in 2009 and the application of four treatments in 2010 using active ingredients from different chemical families (pyrethroid, organophosphate and chlorinicotinyl). On the other hand, management of the peach twig borer by the degree-days method tested and planned on the basis of a bifenthrin treatment between 150 to 204 degree-days accumulated from biofix, gave interesting results where the percentage of affected fruits hardly exceeded 0.5% over the four years of study.

Key words: Anarsia lineatella, degree-days model, peach twig borer, tolerance threshold

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