Host plants and host plant preference studies for Bactrocera invadens (Diptera: Tephritidae) in Kenya, a new invasive fruit fly species in Africa

Publication Type

Journal Article

Journal Name

Annals of the Entomological Society of America

Name of Author

• Ivan Rwomushana, International Centre of Insect Physiology and Ecology Nairobi
• Sunday Ekesi, International Centre of Insect Physiology and Ecology Nairobi
• Ian Gordon, International Centre of Insect Physiology and Ecology Nairobi
• Callistus K.P.O. Ogol, Kenyatta University

Publication Date

3-1-2008

Abstract

Bactrocera invadens Drew, Tsuruta & White (Diptera: Tephritidae), an invasive fruit fly species of Asian origin, was detected in Kenya in 2003, and is now well established in several parts of the country. We assessed the host range of this major quarantine pest in Kenya by collecting a wide range of cultivated and wild host plants from December 2004 to April 2006. Fruit were collected from 90 plant species representing 40 families from the Coast, Eastern, and Rift Valley provinces of the country where the fly population had been observed to occur in large numbers and where fruit and vegetable production is predominant. Fourteen plant species, among them cultivated and wild fruiting species, were found to be hosts of B. invadens. Fruit of mango, Mangifera indica L. (Anacardiaceae); banana Musa sp. AAA (Musaceae); and citrus [ Carm limon (L.) Burm.f. (lemon), Citrus reticulata Blanco (tangerine), and Citrus sinensis (sweet orange) (all Rutaceae) ], were among the cultivated species heavily infested by B. invadens. Marula Sclerocarya birrea (A.Rich) Hochst. (Anacardiaceae) and Terminalia catappa L. (Combretaceae) were found to be the most infested noncultivated plants. These wild plants evidently ensure that sufficient reproductive bases exist for B. invadens during the off-season when the cultivated hosts are not in fruiting. In laboratory host preference studies, mango and banana were found to be the most preferred host plants among the nine cultivated plant species tested. © 2008 Entomological Society of America.

Keywords

Bactrocera invadens, Fruit fly, Host plant, Host preference, Infestation index

Recommended Citation

Rwomushana, I., Ekesi, S., Gordon, I., & Ogol, C. (2008). Host plants and host plant preference studies for Bactrocera invadens (Diptera: Tephritidae) in Kenya, a new invasive fruit fly species in Africa. Annals of the Entomological Society of America, 101 (2), 331-340. https://doi.org/10.1603/0013-8746(2008)101[331:HPAHPP]2.0.CO;2

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