Diapause of Hyphantria cunea (Lepidoptera: Arctiidae) Induced by Photoperiod and Temperature

被引：0
|
作者：
Wang S. [1 ,2 ]
Zhou Z. [2 ]
Chen Y. [1 ]
Wang Y. [1 ]
Zhang Y. [1 ]
Qu L. [1 ]
机构：
[1] Key Laboratory of Forest Protection of National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, CAF, Beijing
[2] College of Forestry, Henan University of Science and Technology, Luoyang
来源：
Linye Kexue/Scientia Silvae Sinicae | 2020年 / 56卷 / 04期
关键词：
Diapause; Hyphantria cunea; Photoperiod; Sensitive instars; Temperature;
D O I：
10.11707/j.1001-7488.20200413
中图分类号：
TK1 [热力工程、热机];
学科分类号：
080702 ;
摘要：
Objective: This paper aims to investigate effects of photoperiod and temperature on the diapause of Hyphantria cunea, to clarify main factors of inducing the diapause, and to unveil the sensitive larval instars to photoperiod inducing the diapause. Method: In this experiment, four temperatures (21, 23, 25 and 27℃) and 7 photoperiods (L8:D16, L10:D14, L12:D12, L13:D11, L14:D10, L15:D9 and L16:D8) were set. The diapause incidence of these 28 treatments were analyzed and compared to show the effects of photoperiod and temperature and critical photoperiod on diapause of H. cunea. Under the condition of 23℃, the larvae were alternately treated with long photoperiod (L16:D8) and/or short photoperiod (L10:D14) at different developmental stages. The diapause incidence under 32 different treatments were statistically analyzed and compared to determine the sensitive period of larval instars for diapause induced by the photoperiod. Result: At four different temperatures (21, 23, 25 and 27℃), the day time less than 13 h caused the diapause of H. cunea, while when the day time reached 16 h tended the individual continued to develop without diapause. The diapause is controlled by photoperiod and temperature at the same time when the day length was in the range of 13 to 16 h, and the diapause incidence decreased with the increase of temperature or photoperiod. The critical photoperiod was 14 h 58 min:9 h 02 min (L:D), 14 h 45 min:9 h 15 min (L:D), 14 h 35 min:9 h 25 min (L:D) and 14 h 24 min:9 h 36 min (L:D) at 21, 23, 25 and 27℃, respectively. Also, the response of the larvae to short photoperiod inducing diapause is cumulated, and the 3rd, 4th and 5th instar were the most sensitive instars to short photoperiod inducing diapause of H. cunea. Conclusion: The results indicate that the H. cunea is a typical short-photoperiod diapause (long photoperiod development) insect. The photoperiod plays a crucial role in the process of diapause induction, and temperature is the cofactor of diapause induction. Low temperature and short photoperiod are favorable for the diapause, and the critical photoperiod shortens with the increase of temperature. It is found that 3-5 instar of H. cunea larvae are the most sensitive developmental stage to diapause induction by short photoperiod. © 2020, Editorial Department of Scientia Silvae Sinicae. All right reserved.
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页码：121 / 127
页数：6
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