Assessing the flight capabilities of fed and starved Allograpta obliqua (Diptera: Syrphidae), a natural enemy of Asian citrus psyllid, with computerized flight mills

  • Nicola A Irvin Department of Entomology, University of California, 900 University Avenue, Riverside, California 92521, USA
  • Mark S Hoddle Department of Entomology, University of California, 900 University Avenue, Riverside, California 92521, USA

Abstract

Flight mills were used to investigate flight capabilities of Allograpta obliqua (Say) (Diptera: Syriphidae), an important predator of Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae), in California. Specifically, distance by which A. obliqua can fly in 24 h, and the effect of sex and feeding treatment (fed or starved) on flight capabilities were investigated. A total of 17 (7 females, 10 males) laboratory-reared flies were flown. There was no significant effect of sex on distances flown. Out of a total of 3,487 flight bouts, 7 consisted of A. obliqua flying 1 to 2 m, and 5 bouts consisted of A. obliqua flying over 5 m. The remaining bouts (99.7%) were less than 1 m and were considered ‘hovering’ because they consisted of extremely short bursts of flight activity (< 10 s). The 5 bouts over 5 m were conducted by 2 fed females, and the mean distance flown and mean flight bout time were 39 ± 13 m and 113 ± 24 s, respectively.

Key Words: Asian citrus psyllid; Diaphorina citri; distance; hoverfly; sex

Sumario

Se utilizaron molinos de vuelo para investigar la capacidad de vuelo de Allograpta obliqua (Saytera) (Diptera: Syriphidae), un depredador importante del psílido asiático de cítricos, Diaphorina citri Kuwayama (Hemiptera: Liviidae), en California. Específicamente, se investigó la distancia que A. obliqua puede volar en 24 horas, el efecto del sexo, del tratamiento y de alimentación (alimentado o hambriento) sobre la capacidad de volar. Se volaron un total de 17 (7 hembras, 10 machos) moscas criadas en laboratorio. El sexo de la mosca no tenia un efecto significativo sobre la distancia volada. De un total de 3,487 pruebas de vuelo, 7 consistieron en A. obliqua volando de 1 a 2 metros, y 5 pruebas consistieron en A. obliqua volando sobre 5 metros. Las pruebas restantes (99.7%) fueron menos de 1 metro y se consideraron “flotantes” porque consistieron en ráfagas extremadamente cortas de actividad de vuelo (< 10 s). En las 5 pruebas de más de 5 metros realizados por 2 hembras alimentadas, el promedio de la distancia recorrida y del tiempo de vuelo fueron 39 ± 13 metros y 113 ± 24 s, respectivamente.

Palabras Clave: psílido asiático de los cítricos; Diaphorina citri; distancia; mosca cernera; sírfido; sexo

View this article in BioOne

Published
2020-04-15
Section
Scientific Notes