Assessment of the efficiency of local protein-rich products for mass rearing of Bactrocera dorsalis (Hendel) and the parasitoid Fopius arisanus (Sonan)

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10th International Symposium on Fruit Flies of Economic Importance

Tapachula, Chiapas, Mexico April 23 – 27, 2018.

Session 1. Biology, Ecology, Physiology and Behavior

 

Assessment of the efficiency of local protein-rich products for mass rearing of Bactrocera dorsalis (Hendel) and the parasitoid Fopius arisanus (Sonan)

ADJAMAI Mariano M.1, ANATO M. Florence1, GNANVOSSOU Désiré2, SINZOGAN A. C. Antonio1, WARGUI B. Rosine1, BOKONON-GANTA H. Aimé1

1Faculty of Agronomics Sciences, University of Abomey-Calavi, 03 BP 2819 Cotonou, Benin, Email: anatoflorence@yahoo.fr; International Institute of Tropical Agriculture (IITA) Benin, 08 BP 0932 Tripostal, Cotonou

Background: Fopius arisanus (Sonan) is an ovo-pupal parasitoid used as biocontrol agent against the oriental fruit fly Bactrocera dorsalis (Hendel). The effectiveness of this parasitoid in the field depends partly on the quality of its mass rearing system. Preparation of artificial diets results in high costs and their qualities have great impact on performance of larvae and adults of B. dorsalis and F. arisanus.

Methods: We evaluated some local protein-rich products such as powder of moringa leaves, powder of cassava leaves and soybean flour as substitute to the expensive imported hydrolysate yeast. Life history parameters of F. arisanus and B. dorsalis were compared in relation to the diets. Costs of each diet were also evaluated.

Results: The results revealed that B. dorsalis eggs hatchability on moringa diet was high while the adult emergence rate was low. Cassava diet did not differ from the deactivated hydrolysate yeast in eggs hatchability, pupal recovery and adult B. dorsalis emergence rate. However F. arisanus-parasitized B. dorsalis egg hatchability on moringa and cassava diet was higher than the other diets. The pupal recovery from cassava, papaya and soybean was lower than from the control. Parameters such as larval duration, larval survival rate and sex-ratio did not significantly differ among treatments for any of the two species. Pupal weight and emergence rate of F. arisanus did not differ among treatments.

Conclusion: Having regards to the life history parameters assessed on F. arisanus and B. dorsalis, the best local protein-based diet was the cassava diet which offered performances globally closed to the control diet. In contrast the papaya diet and the Moringa diet performance were low.

Key words: Larval artificial diet, Bactrocera dorsalis, cassava diet, Fopius arisanus, mass rearing, protein.