Does Wolbachia infection affect Trichogramma atopovirilia behaviour?

Area of Science:

• Entomology
• Biological Control
• Insect Behavior

Background:

• Unisexual Trichogramma wasps are explored for biocontrol due to potential advantages.
• Understanding Wolbachia's impact on host fitness is key to assessing unisexual forms for pest management.
• The study investigates Wolbachia's influence on foraging behavior in T. atopovirilia.

Purpose of the Study:

• To determine the effect of Wolbachia infection on the foraging behavior of Trichogramma atopovirilia females.
• To assess if Wolbachia infection imposes a fitness cost on T. atopovirilia in terms of behavior and reproduction.
• To evaluate the suitability of unisexual (Wolbachia-infected) Trichogramma for biological control programs.

Main Methods:

• Behavioral assays were conducted on Wolbachia-infected and uninfected T. atopovirilia females.
• Walking activity and speed were measured across different temperatures (15, 20, 25°C).
• Parasitism rate and offspring production were compared between infected and cured females.

Main Results:

• Temperature significantly affected female walking activity, with peak activity at 25°C.
• No significant differences in walking activity, walking speed, or foraging behavior were observed between Wolbachia-infected and uninfected females.
• Parasitism rates and offspring numbers were comparable between infected and cured T. atopovirilia females.

Conclusions:

• Wolbachia infection does not appear to impose a significant behavioral or reproductive cost on T. atopovirilia females under the tested conditions.
• The findings suggest that unisexual T. atopovirilia may be viable biocontrol agents without inherent fitness disadvantages related to Wolbachia.
• Further research is needed to fully elucidate the biological control potential of these wasps.