Flight performance of Macdunnoughia crassisigna (Lepidoptera: Noctuidae)

Area of Science:

• Agricultural Entomology
• Insect Ecology
• Pest Management

Background:

• Macdunnoughia crassisigna is a destructive agricultural pest in East Asia, impacting crops like cotton, maize, and soybeans.
• Understanding its migratory behavior is vital for effective pest control and forecasting.

Purpose of the Study:

• To investigate the influence of age, temperature, and relative humidity on the flight performance of Macdunnoughia crassisigna moths.
• To determine the optimal environmental conditions for sustained flight in this pest species.

Main Methods:

• Utilized computerized flight mills to assess the flight activity of Macdunnoughia crassisigna moths over a 24-hour period.
• Evaluated flight parameters in moths of varying ages under controlled temperature and relative humidity conditions.

Main Results:

• Macdunnoughia crassisigna moths demonstrated sustained flight capabilities, with peak performance observed in 3-day-old individuals.
• Optimal flight activity occurred between 24-28°C and 60-75% relative humidity.
• Under optimal conditions, 3-day-old moths achieved a mean flight distance of 66 km and duration of 13.5 hours.

Conclusions:

• Macdunnoughia crassisigna possesses significant long-distance migratory potential.
• Flight performance is significantly influenced by moth age, temperature, and relative humidity.
• Findings provide critical data for developing predictive models for this agricultural pest.