Population dynamics of the oriental fruit fly, Bactrocera dorsalis (Diptera: Tephritidae) in the Kunming area,southwestern China |
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作者姓名: | HUI YE JIAN-HONG LIU |
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作者单位: | Department of Biology, Yunnan University, Kunming, China |
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摘 要: | Population dynamics of Bactrocera dorsalis Hendel (Diptera: Tephritidae) were studied through pheromone trapping over 4 years (1997, 1999, 2000, 2003) in the Kunming region, a high plateau area in southwestern China. B. dorsalis immigrates from southern Yunnan to Kunming each year, and occurs during early May through November. Annual trap captures recorded an increase in the B. dorsalis populations from May to July, when they peaked in abundance, and a decline until November. No flies were detected from November to April. The fruit flies had two generations. There was considerable overlapping due to the continuous arrival of immigrating flies during the summer months. Annual capture rates were significantly related to numbers of flies caught in July when peak captures were recorded; whereas the peak captures, in turn, positively depended on numbers of flies recorded in May, the first month of fly appearance in the current year. It suggested that the annual population abundance was mainly dependent on the size of the initial emigrating population. A daily average temperature of 18℃ was probably the threshold temperature required for the flies to undertake long-range dispersal, which partially explained the start of the fly in May each year on this high plateau. Under field conditions, the fruit flies can withstand 13℃ as a daily average temperature. No flies were recorded in any of the study years at a daily temperature colder than 10 ℃.
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关 键 词: | 种群动态 果虫 双翅目 昆明市 中国 |
收稿时间: | 2005-06-14 |
修稿时间: | 2005-06-14 |
Population dynamics of the oriental fruit fly, Bactrocera dorsalis (Diptera: Tephritidae) in the Kunming area, southwestern China |
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Authors: | HUI YE JIAN-HONG LIU |
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Institution: | Department of Biology, Yunnan University, Kunming, China |
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Abstract: | Abstract Population dynamics of Bactrocera dorsalis Hendel (Diptera: Tephritidae) were studied through pheromone trapping over 4 years (1997, 1999, 2000, 2003) in the Kunming region, a high plateau area in southwestern China. B. dorsalis immigrates from southern Yunnan to Kunming each year, and occurs during early May through November. Annual trap captures recorded an increase in the B. dorsalis populations from May to July, when they peaked in abundance, and a decline until November. No flies were detected from November to April. The fruit flies had two generations. There was considerable overlapping due to the continuous arrival of immigrating flies during the summer months. Annual capture rates were significantly related to numbers of flies caught in July when peak captures were recorded; whereas the peak captures, in turn, positively depended on numbers of flies recorded in May, the first month of fly appearance in the current year. It suggested that the annual population abundance was mainly dependent on the size of the initial emigrating population. A daily average temperature of 18 °C was probably the threshold temperature required for the flies to undertake long‐range dispersal, which partially explained the start of the fly in May each year on this high plateau. Under field conditions, the fruit flies can withstand 13 °C as a daily average temperature. No flies were recorded in any of the study years at a daily temperature colder than 10 °C. |
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Keywords: | Bactrocera dorsalis Kunming migration oriental fruit fly population dynamics |
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