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Influence of Phase Change on Parthenogenesis in the Migratory Locust: A Behavioral Analysis
Rongjing Li1, Xuelei Wei1, Liwei Zhang1
1College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China.
Insects
|September 27, 2025
Summary
Solitary migratory locusts show higher parthenogenesis capacity than gregarious ones. However, parthenogenesis yields lower hatching rates than sexual reproduction in these destructive agricultural pests.
Area of Science:
- Entomology
- Reproductive Biology
- Insect Pest Management
Background:
- The migratory locust (Locusta migratoria) is a significant agricultural pest.
- Phase polyphenism (phase change) is a key characteristic of migratory locusts.
- Parthenogenesis, reproduction without fertilization, is less understood in locusts.
Purpose of the Study:
- To investigate the relationship between parthenogenesis and phase change in migratory locusts.
- To compare the parthenogenesis capacity of solitary versus gregarious locust phases.
- To explore factors influencing parthenogenesis in gregarious locusts.
Main Methods:
- Comparative analysis of oviposition quantity and hatching rates between solitary and gregarious locust phases.
- Assessment of parthenogenesis in isolated gregarious locusts based on juvenile density.
- Comparison of hatching rates between parthenogenetic and sexually fertilized females.
Main Results:
- Solitary locusts demonstrated higher parthenogenesis capacity (more eggs, higher hatching rates) than gregarious locusts.
- Parthenogenesis resulted in significantly lower hatching rates compared to sexual reproduction.
- Isolated gregarious locusts showed increased parthenogenetic capacity, influenced by juvenile density.
Conclusions:
- Phase change in migratory locusts influences their capacity for parthenogenesis.
- Parthenogenesis in locusts is less efficient than sexual reproduction.
- Understanding these mechanisms can inform pest management strategies.
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