The host fruit amplifies mutualistic interaction between Ceratitis capitata larvae and associated bacteria.

Area of Science:

• Entomology
• Microbiology
• Pest Management

Background:

• The Mediterranean fruit fly (Ceratitis capitata) is a significant horticultural pest.
• Larval development is linked to bacterial fruit decay, but the larval-bacterial interaction is poorly understood.
• Understanding this relationship is key for developing novel pest control strategies.

Purpose of the Study:

• Investigate the role of bacteria in Mediterranean fruit fly larval development.
• Examine the interaction between fly larvae and their associated microbiota within the host fruit.
• Determine the contribution of maternal microbiota to larval development.

Main Methods:

• Culturing and testing bacterial isolates for effects on egg hatch and larval development.
• Analyzing the influence of maternal gut microbiota on larval development.
• Observing bacterial spread and transfer among larvae within infested fruit.

Main Results:

• No tested bacterial isolates negatively impacted egg hatch or larval development.
• Maternal gut microbiota supports larval development, with variations based on host and antimicrobial peptides.
• Larvae significantly contribute to spreading bacterial contagion within the fruit.
• First evidence of horizontal bacterial transfer between larvae of different maternal origins in the same fruit.

Conclusions:

• Fruit fly larvae are crucial in disseminating and shaping fruit microbial populations.
• Infested fruits act as microbial hubs, amplifying and spreading bacterial strains among larvae.
• The interaction highlights potential targets for integrated pest management of the Mediterranean fruit fly.