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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2015年52 No.3

Measurement of physiological indices of cold tolerance inBactrocera cucurbitae (Coquillett)
Author of the article:HUANG Na-Na1, 2** DAI Peng2 FU Yue-Guan2 JIN Tao2*** HUANG Qiu-Ying1***
Author's Workplace:1. Huazhong Agricultural University/Hubei Insect Resource Utilization and Sustainable Pest Management Key Laboratory, Wuhan 430070, China; 2. Environment and Plant Protection Institute, Key Laboratory of Monitoring and Control of Tropical Agricultural and Forest Invasive Alien Pests, Ministry of Agriculture/Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Chinese Academy of Tropical Agriculture Sciences, Danzhou 571737, China
Key Words:Bactrocera cucurbitae (Coquillett), cold tolerance, supercooling point, physiological index
Abstract:[Objectives]  To investigate cold tolerance in different developmental stages of B. cucurbitae. [Methods]  The supercooling point (SCP), and water, lipid, glycerin and carbohydrate content, of different developmental stages of B. cucurbitae, were measured and compared. [Results]  Five day-old pupae had the lowest supercooling point of any developmental stage (17.04) and 1 day-old larvae the highest (11.82). However, there was no significant difference in the supercooling points of male and female adults of the same age. Water content reduced with age from 79.64% in 1 day-old larvae to 65.31% in 5 day-old pupae, which was the lowest water content recorded in all developmental stages. The water content of female adults were significantly higher than that of male adults in the same age. The fat content at 5 day-old larva was 32.90%, which was the highest among all the developmental stages. The lowest fat content were found in 1 day-old male adults (15%) and 14 day-old male adults (15%). The glycerol content in the larval stage decreased from 3.32 μg/mg to 1.12 μg/mg, and it increased gradually during the pupal stage. The highest point was detected in 14 day-old female adults (5.90 μg/mg). The total sugar content, trehalose content and glycogen content in 1 day-old larva all were the highest among all the developmental stages, which were 7.51, 0.94 and 1.93μg/mg respectively. The content of carbohydrates decreased gradually during the pupal stage, and they increased with the growth of age in the adult stage. [Conclusion]  These results would provide the basis for exactly evaluating the geography adaptability and quarantine cold treatment on B. cucurbitae.
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