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25 June 2020 Effect of Short-Term Low Temperature on the Growth, Development, and Reproduction of Bactrocera tau (Diptera: Tephritidae) and Bactrocera cucurbitae
Yuyu Huang, Xiangpeng Gu, Xiaoqin Peng, Mei Tao, Lei Peng, Guohua Chen, Xiaoming Zhang
Author Affiliations +
Abstract

The fruit flies Bactrocera tau (Walker) and B. cucurbitae (Coquillett) are economically important invasive pests on numerous vegetable and fruit species in China. Due to the instability of the early spring climate, temperatures often deviate far below the normal temperature for short periods of time. Such a sudden short-term low temperature may impact the reproduction and development of the two fruit fly species. In this study, the effects of low temperatures (8, 6, 4, 2, 0, –2, and –4°C) on the development and reproduction of these two closely related fruit fly species were studied under laboratory condition. The results showed that their survival rates decreased gradually with corresponding decreases in the tested temperatures. On the other hand, their pre-oviposition periods and their adult female to male sex ratios increased, while the average number of eggs per female of each species and longevity of male adult of B. cucurbitae initially increased and later decreased after exposure to the low-temperature treatments. Overall, low temperatures promoted reproduction in B. cucurbitae and B. tau at temperatures ranging from 24°C to as low as 8°C. Development and reproduction of the two species were negatively affected when temperatures were between 8 to –4°C. The cold resistance of each developmental stage was higher in B. tau than in corresponding stages of B. cucurbitae.

© The Author(s) 2020. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
Yuyu Huang, Xiangpeng Gu, Xiaoqin Peng, Mei Tao, Lei Peng, Guohua Chen, and Xiaoming Zhang "Effect of Short-Term Low Temperature on the Growth, Development, and Reproduction of Bactrocera tau (Diptera: Tephritidae) and Bactrocera cucurbitae," Journal of Economic Entomology 113(5), 2141-2149, (25 June 2020). https://doi.org/10.1093/jee/toaa140
Received: 12 March 2020; Accepted: 3 June 2020; Published: 25 June 2020
JOURNAL ARTICLE
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KEYWORDS
Bactrocera cucurbitae
Bactrocera tau
development
reproduction
short-term low temperature
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