Resistance Changes in Cotton Aphids to Sulfoxaflor
Author Information
Author(s): Lv Mingyuan, Wang Wei, Fang Fengyun, Fu Xiaowei, Liang Gemei
Primary Institution: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences
Hypothesis
How does the resistance of Aphis gossypii to sulfoxaflor change over generations without insecticide pressure?
Conclusion
Cotton aphids can regain susceptibility to sulfoxaflor after 22 generations without insecticide pressure, but they still exhibit reduced fitness.
Supporting Evidence
- The resistant strain of Aphis gossypii showed a significant decrease in resistance after 22 generations without insecticide pressure.
- Relative fitness of the resistant strain was lower than that of the susceptible strain.
- Feeding behavior analysis indicated reduced phloem-feeding ability in resistant strains compared to susceptible ones.
Takeaway
Cotton aphids can become less resistant to a pesticide if they stop being exposed to it for a while, but they might still not be as healthy as before.
Methodology
The study involved comparing the fitness and feeding behavior of resistant and susceptible strains of Aphis gossypii using life table parameters and electrical penetration graph (EPG) techniques.
Limitations
The study may not account for all environmental factors affecting aphid behavior and resistance.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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