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Article

Sex and Body Colour Affect the Variation in Internal Body Temperature of Oedaleus decorus asiaticus in Natural Habitats in Inner Mongolia, China

1
MARA-CABI Joint Laboratory for Bio-Safety, Institute of Plant Protection, Chinese Academy of Agricultural Science, Beijing 100193, China
2
CABI East and Southeast Asia, Beijing 100081, China
3
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Science, Beijing 100193, China
4
The Administrative Office of Yuanmingyuan Park of Beijing Municipality, Beijing 100084, China
5
CABI, Egham TW20 9TY, UK
*
Author to whom correspondence should be addressed.
Agriculture 2022, 12(6), 878; https://doi.org/10.3390/agriculture12060878
Submission received: 23 April 2022 / Revised: 13 June 2022 / Accepted: 15 June 2022 / Published: 17 June 2022
(This article belongs to the Section Crop Protection, Diseases, Pests and Weeds)

Abstract

Oedaleus decorus asiaticus is one of the most harmful locusts in agricultural and pastoral areas in China. Plagues of this grasshopper can aggravate grassland degradation and cause huge damage to the livestock industry. Fungal biopesticides are seen as a suitable means of controlling grasshoppers and locusts. However, the efficiency of fungal biopesticides is dependent on temperature. Currently, there is limited knowledge on the thermal biology of this grasshopper in natural habitats. In this study, ground temperature measurements were made in conjunction with measurements of internal body temperatures using thermocouples and hand-held thermometers. The grasshoppers were randomly caught during the daytime in 2017 and 2018 in eight different locations in Inner Mongolia Autonomous Region, China. Our results indicated that the average internal body temperature of nymphs as well as adults of O. d. asiaticusis was higher than the ground temperature and that it increases/decreases with increases/decreases in ground temperature, respectively, during the daytime. Moreover, the adult internal body temperature is significantly higher than that of the nymphs at different times of the day, specifically around 6:00, 10:00, 13:00, and 18:00. Female internal body temperatures were significantly higher than those of the males by an average of 0.90 °C. Additionally, the average internal body temperature of the brown morphs was higher than that of the green morphs by approximately 1.17 °C. These findings demonstrate that brown morph insects might be more tolerant of fungal biopesticides and hence the biopesticides may take longer to kill them. Hence, ecophysiological adaptations to climate change may affect how fungal biopesticides could be used in the future.
Keywords: grasshopper; internal body temperature; polymorphism; nymph; adult; mixed model; fungal biopesticides grasshopper; internal body temperature; polymorphism; nymph; adult; mixed model; fungal biopesticides

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MDPI and ACS Style

Cheng, Y.; Li, H.; Liu, L.; Wang, G.; Gu, H.; Luke, B. Sex and Body Colour Affect the Variation in Internal Body Temperature of Oedaleus decorus asiaticus in Natural Habitats in Inner Mongolia, China. Agriculture 2022, 12, 878. https://doi.org/10.3390/agriculture12060878

AMA Style

Cheng Y, Li H, Liu L, Wang G, Gu H, Luke B. Sex and Body Colour Affect the Variation in Internal Body Temperature of Oedaleus decorus asiaticus in Natural Habitats in Inner Mongolia, China. Agriculture. 2022; 12(6):878. https://doi.org/10.3390/agriculture12060878

Chicago/Turabian Style

Cheng, Yumeng, Hongmei Li, Lulu Liu, Guangjun Wang, Haojing Gu, and Belinda Luke. 2022. "Sex and Body Colour Affect the Variation in Internal Body Temperature of Oedaleus decorus asiaticus in Natural Habitats in Inner Mongolia, China" Agriculture 12, no. 6: 878. https://doi.org/10.3390/agriculture12060878

APA Style

Cheng, Y., Li, H., Liu, L., Wang, G., Gu, H., & Luke, B. (2022). Sex and Body Colour Affect the Variation in Internal Body Temperature of Oedaleus decorus asiaticus in Natural Habitats in Inner Mongolia, China. Agriculture, 12(6), 878. https://doi.org/10.3390/agriculture12060878

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