Interference of sonic communication and mating in leafhopperAmrasca devastans (distant) by certain volatiles

Area of Science:

• Entomology
• Chemical Ecology
• Insect Behavior

Background:

• Leafhoppers, such asAmrasca devastans, rely on specific communication methods for mating.
• Chemical cues and acoustic signals play crucial roles in insect reproductive behaviors.
• Understanding mating inhibition mechanisms is vital for pest management strategies.

Purpose of the Study:

• To investigate the effect of cineole vapors on the mating behavior ofAmrasca devastans.
• To determine if cineole inhibits mating by affecting insect survival, host plant interaction, or communication.
• To assess the chemical specificity of cineole's effect on mating.

Main Methods:

• Leafhopper colonies were exposed to cineole vapors surrounding their host plants.
• Mating frequency and fertilization rates were monitored.
• Insect toxicity and leaf-surface arrival were assessed.
• The impact of cineole on acoustic communication and female sexual response was evaluated.

Main Results:

• Cineole vapors significantly inhibited mating inAmrasca devastans.
• A decline in the percentage of mating pairs and fertilized females was observed.
• Cineole was not toxic and did not deter insects from reaching host plant leaves.
• Mating inhibition was attributed to interference with surface-mediated sonic communication.
• The effect was chemically specific, with cineole being more effective than citral.
• Female sexual response to male sonic signals decreased upon exposure to cineole.

Conclusions:

• Cineole acts as a potent mating inhibitor forAmrasca devastans.
• The primary mechanism involves disruption of acoustic sexual communication.
• Cineole represents a potential semiochemical for managing leafhopper populations through mating disruption.