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Rearing and releasing of Opius concolor in organic olive orchards

KOÇ, Fulya (2002) Rearing and releasing of Opius concolor in organic olive orchards. [Elevage et lâcher d’Opius concolor dans les oliveraies biologiques.] Thesis, IAMB Mediterranean Agronomic Institute of Bari , Organic Farming. Tesi Master of Science, no. 280. . [Unpublished]

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The olive tree finds suitable conditions for growing well in the Mediterranean basin. Besides, olives and olive oil play an increasingly important nutritional role in Mediterranean countries and are an essential part of what is widely known as “Mediterranean diet”. Unfortunately one of the most injurious pests is olive fly (Bactrocera oleae). Of African origin, this fruit fly is the key pest of olive throughout the Mediterranean Basin and the Middle East. The olive organic production is developing in order to save the environment and to obtain a safe product. One of the most difficult challenges for conformity of the organic method to Reg. CEE 2092/91 is plant protection. Various experimental tests on the biological control of the olive fruit fly have given encouraging results regarding the mass introduction of the endoparasite Opius concolor reared in laboratory conditions. Ceratitis capitata was used in the rearing program of Opius concolor in the insectarium of IAM-Bari (IT). For the releasing of Opius concolor two fields in the province of Bari (IT), which have two different climates, were tested in order to check the effect of two different climates on the populations of Opius concolor and also of B. oleae. It is concluded that the coastal area is more favorable than the inland for Opius concolor for a good parasitization. In the rearing program, the populations of the reared Opius were compared with those of the indigenous Opius in the insectarium according to parasitization and time development. Parasitation ability of reared Opius was higher than that of indigenous Opius and reared Opius lives longer under laboratory conditions. As for development over time there is no difference between reared Opius and the indigenous one.

Summary translation

L’olivier trouve les conditions idéales pour son développement dans le bassin méditerranéen. Les olives et l’huile d’olive jouent un rôle de plus en plus important dans ces mêmes pays et sont des ingrédients essentiels de la diète méditerranéenne. Malheureusement, la mouche de l’olivier (Bactrocera oleae) est l’un des ravageurs les plus redoutables. D’origine africaine, cette mouche est l’insecte clé des oliviers dans le bassin méditerranéen et au Moyen Orient. Le développement de la culture des oliviers en régime biologique doit faire face au défi de la conformité de la protection des plantes avec le Règlement CEE 2092/91.Les expériences de lutte biologique contre la mouche de l’olivier ont donné des résultats encourageants concernant l’introduction en masse d’Opius concolor.Dans le programme d’élevage d’Opius concolor dans l’insectarium de l’IAM-B, on a utilisé Ceratitis capitata. Opius concolor a été lâché dans deux parcelles de la province de Bari ayant des conditions climatiques différentes afin de tester l’effet du climat sur les populations d’O. concolor et de B. oleae.La zone côtière favorise la capacité de parasiter d’Opius concolor. Dans le programme d’élevage, on a comparé les Opius élevés avec les Opius indigènes. Il en résulte que la capacité de parasiter est plus importante chez les Opius élevés par rapport aux Opius indigènes.

EPrint Type:Thesis
Thesis Type:Master thesis
Keywords:Rearing, Releasing, Opius concolor, Biological control, Bactrocera oleae, Organic olive
Subjects: Crop husbandry > Crop health, quality, protection
Research affiliation: Italy > IAMB Mediterranean Agronomic Institute Bari
Deposited By: Dr. Driouech, Noureddin Ph.D
ID Code:6528
Deposited On:12 Jan 2006
Last Modified:12 Apr 2010 07:32
Document Language:English
Refereed:Not peer-reviewed

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