Study on Overwintering Stages and Cold Tolerance of Riptortus pedestris (Fabricius) in Huang-Huai-Hai Region

doi:10.11924/j.issn.1000-6850.casb2025-0097

Abstract

Abstract:

In order to explore the overwintering stages and cold tolerance of Riptortus pedestris, the possibility of its overwintering in Huang-Huai-Hai Region and the corresponding overwintering stages were analyzed through field investigations of wild overwintering populations, simulated overwintering experiments and adult temperature-dependent survival experiments. Additionally, the supercooling points and freezing points of Riptortus pedestris in different stages were determined by a supercooling point measuring instrument. The results showed that adults of Riptortus pedestris and their eggs lived longer after entering winter in Huang-Huai-Hai Region, which may be the overwintering state of. Eggs cannot survive due to hatching conditions and host feeding, indicating that Riptortus pedestris crossed the whole winter in Huang-Huai-Hai Region in adult stage, and the proportion of adults was 20.4 %. The survival rate of adult Riptortus pedestris in the field was higher than that in indoor, with the survival rate of 23.33%. The survival rates of the simulated temperature-dependent survival experiment on adult Riptortus pedestris were in good agreement with those of the overwintering experiment. The supercooling point and freezing point of adult Riptortus pedestris are lower than other patterns, which are -17.61℃ and -8.59℃ respectively, indicating that Riptortus pedestris has cold hardiness and low temperature survival ability. The Huang-Huai-Hai Region and other temperate zones may be the winter breeding area of Riptortus pedestris.

Key words: Riptortus pedestris, Huang-Huai-Hai Region, overwintering, supercooling point, freezing point, cold hardiness, the overwintering stages of insects

WANG Chaowei, LI Jinbu, YIN Maozhu, WANG Yueying, XU Hao, ZHU Dongku, ZHOU Yanhu, MA Guimei, HU Zhuangzhuang, ZHANG Qingsong, DONG Kai, WANG Lulu, LIU Xingzhou. Study on Overwintering Stages and Cold Tolerance of Riptortus pedestris (Fabricius) in Huang-Huai-Hai Region[J]. Chinese Agricultural Science Bulletin, 2025, 41(15): 138-142.

Figures/Tables 4

References 27

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虫态	昆虫数量/只	过冷却点			结冰点
虫态	昆虫数量/只	平均值	最大值	最小值	平均值	最大值	最小值
卵	30	(-22.26±0.43)d	-19.34	-26.34	(-19.18±0.37)g	-23.34	-17.01
1龄幼虫	30	-5.22±0.23)a	-1.87	-6.34	(-1.16±0.08)a	-1.76	-0.39
2龄幼虫	30	(-6.02±0.29)a	-2.32	-7.67	(-2.36±0.17)a	-4.17	-0.32
3龄幼虫	30	(-6.87±0.33)a	-3.63	-9.56	(-3.32±0.19)bc	-4.56	-0.63
4龄幼虫	30	(-9.12±0.42)b	-2.73	-13.44	(-5.58±0.41)d	-8.51	-0.89
5龄幼虫	30	(-12.22±0.55)b	-7.90	-15.43	(-6.84±02.49)d	-11.11	-0.32
越冬代雌虫	30	(-16.10±0.76)c	-5.75	-25.46	(-7.70±0.38)e	-10.83	-0.90
越冬代雄虫	30	(-17.61±0.88)c	-5.89	-22.54	(-8.59±0.83)ef	-15.76	-0.76
室内雌虫	30	(-15.33±0.89)c	-3.13	-20.46	(-7.17±0.54)e	-10.33	-0.45
室内雄虫	30	(-16.23±0.50)c	-7.90	-15.23	(-7.55±0.68)e	-13.40	-0.60

虫态	昆虫数量/只	过冷却点			结冰点
虫态	昆虫数量/只	平均值	最大值	最小值	平均值	最大值	最小值
卵	30	(-22.26±0.43)d	-19.34	-26.34	(-19.18±0.37)g	-23.34	-17.01
1龄幼虫	30	-5.22±0.23)a	-1.87	-6.34	(-1.16±0.08)a	-1.76	-0.39
2龄幼虫	30	(-6.02±0.29)a	-2.32	-7.67	(-2.36±0.17)a	-4.17	-0.32
3龄幼虫	30	(-6.87±0.33)a	-3.63	-9.56	(-3.32±0.19)bc	-4.56	-0.63
4龄幼虫	30	(-9.12±0.42)b	-2.73	-13.44	(-5.58±0.41)d	-8.51	-0.89
5龄幼虫	30	(-12.22±0.55)b	-7.90	-15.43	(-6.84±02.49)d	-11.11	-0.32
越冬代雌虫	30	(-16.10±0.76)c	-5.75	-25.46	(-7.70±0.38)e	-10.83	-0.90
越冬代雄虫	30	(-17.61±0.88)c	-5.89	-22.54	(-8.59±0.83)ef	-15.76	-0.76
室内雌虫	30	(-15.33±0.89)c	-3.13	-20.46	(-7.17±0.54)e	-10.33	-0.45
室内雄虫	30	(-16.23±0.50)c	-7.90	-15.23	(-7.55±0.68)e	-13.40	-0.60