author(s)
Jamal Ben Yazid, Zouheir Chafik, Anwar Bousamid, Imane Bibi and Ez-Zahra Kharmach

abstract
The mass trapping technique is the set and use of devices to attract insects to a killing agent. In Mediterranean regions, mass trapping has proved to be a powerful technique to control the Mediterranean fruit fly "Ceratitis capitata" (Wiedemann) (Diptera: Tephritidae) in citrus orchards. In Morocco, its application has recently increased due to the phytosanitary requirements imposed by the United States and Russia for citrus exports. This technique based on the set of a high density of traps, with an attractant and a toxicant agent, aims to capture the highest number of Medfly adults in the orchards. In 2016, 2017 and 2018, field trials were carried out in commercial clementine orchards (Citrus clementina variety Fina Berkane) in three localities of Moulouya Perimeter (Lamriss, Reggada and Slimania) to assess the effectiveness of introducing this technique in phytosanitary management programs against Medfly. The objective of this study is to evaluate an Integrated Pest Management Program including mass trapping technique (IPM+MT), a Program based solely on mass trapping, a Program based on a systematic chemical spray every seven days with a lambda-cyhalothrin molecule and a program control based on the conduct of the local growers. The devices used were the dry traps of 'FLYCAP MASS' type, and were hung at a density of 40 traps/ha. Our finding showed that plots that had undergone systematic chemical spray every seven days recorded an average rate of fruit infestation of 2.35%, and those with the Grower's conduct recorded a rate of 4.75%. Therefore, mass trapping, applied alone, did not reduce significantly the rate of fruit infestations by Medfly (3.66%), but once included in an integrated pest management program, it significantly reduced the rate of infested clementine fruits, to achieve a rate of 1.46%. Mass trapping should be taken as an element of a global approach of controlling Medfly in citrus orchards of Moulouya perimeter.