Juvenile hormone regulation on the flight capability of Bactrocera dorsalis (Diptera: Tephritidae) |
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| Institution: | 1. Yunnan Academy of Forestry and Grassland, Kunming 650201, China;2. Biocontrol Engineering Research Center of Plant Disease & Pest, Yunnan University, Kunming 650091, China;3. Southwest Forestry University, Kunming 650224, China;4. Forest Research Institute Malaysia (FRIM), 52109 Kepong, Selangor, Malaysia;1. Department of Plant Protection, College of Horticulture and Landscape, Tianjin Agricultural University, 22 Jinjing Road, Tianjin 300384, China;2. Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China;3. Tianjin Institute of Plant Protection, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China;4. Institute of Entomology, College of Life Sciences, Nankai University, 94 Weijin Road, Tianjin 300071, China;5. South Australian Museum, Department of Terrestrial Invertebrates, Adelaide, SA 5000, Australia;1. The Botanical Gardens, Graduate School of Science, The University of Tokyo, Tokyo 112–0001, Japan;2. Department of Applied Entomology, Faculty of Agriculture, Alexandria University, Alexandria, Egypt;3. Department of Entomology, National Chung Hsing University, Taichung, Taiwan;4. Laboratory of Systems Ecology, Faculty of Agriculture, Saga University, Saga 840–8502, Japan;1. Department of Biology, College of Science, Taibah University, Al-Madinah Al-Munawwarah 344, Saudi Arabia;2. Department of Economic Entomology, Kafrelsheikh University, Kafrelsheikh 33516, Egypt;3. Department of Zoology, Faculty of Science, Ain Shams University, Cairo 11566, Egypt;1. State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment, Chinese Research Academy of Environmental Science, Beijing 10012, China;2. College of Life Science, Northeast Forestry University, Harbin 150040, China |
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| Abstract: | The oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae), is considered a major economic threat in many regions worldwide. In order to better understand the flight capacity of B. dorsalis and its physiological basis, the functions and regulatory roles of juvenile hormone (JH) in the flight muscle of B. dorsalis were studied under a controlled environment. JH titer of B. dorsalis varied with age and sex. Females have higher JH titers and better flight capabilities than males, given that the increase in JH also corresponded to the ovarian development and maturation in females. The flight duration and distance of both males and females increased with the gradual increase of JH titer after adult emergences. Both JH titer and flight capability peaked in 15-d-old adult and declined subsequently with age. Flight activity stimulated the production of JH as adults flown for 24 h on the flight mills have the highest JH titers compare to adults flown on shorter flight durations. Adults treated with 0.5 µg and 5 µg of JH III were able to fly long durations and long distances, nevertheless when JH titer was too low or too high, it would restrict the flight ability of the fly. The mutual reinforcement of JH and flight activity provides fundamental understanding on the physiological aspects of the flight capability and dispersal, which facilitates strategies for the long-term control of this destructive pest. |
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| Keywords: | Physiology JH quantification Flight muscle Flight mill |
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