During sexual signaling, males of Anastrepha obliqua (Macquart) form leks and attract females by producing sounds and releasing volatile compounds. The objective of this study was to investigate the influence time of time of day, age, irradiation, mating status, and the presence of host fruit on the release of volatile components by laboratory-reared A. obliqua males. A. obliqua males released four compounds identified by gas chromatography coupled with mass spectrometry (GC-MS) as (E,E)-alpha-farnesene, (Z,E)-alpha-farnesene, (Z)-3-nonenol, and a farnesene isomer during calling behavior. Although males released volatiles during the entire day, the amount of volatiles was higher in the early morning and afternoon hours. Males began to emit volatiles when they were 6 d old, but only the amount of (Z)-3-nonenol was affected by age. Irradiation of flies with gamma rays from a 60Co source at a dose rate of 80 [corrected] Gy significantly reduced the amount of volatiles released during calling behavior. The amount of volatiles was lower in recently mated males than virgin males. However, there were no significant differences between virgin males and males 24 h after mating. The presence of host fruit did not affect the amount of volatiles compared with the control.

No abstract

During sexual signaling, males of Anastrepha obliqua (Macquart) form leks and attract females by producing sounds and releasing volatile compounds. The objective of this study was to investigate the influence time of time of day, age, irradiation, mating status, and the presence of host fruit on the release of volatile components by laboratory-reared A. obliqua males. A. obliqua males released four compounds identified by gas chromatography coupled with mass spectrometry (GC-MS) as (E,E)-alpha-farnesene, (Z,E)-alpha-farnesene, (Z)-3-nonenol, and a farnesene isomer during calling behavior. Although males released volatiles during the entire day, the amount of volatiles was higher in the early morning and afternoon hours. Males began to emit volatiles when they were 6 d old, but only the amount of (Z)-3-nonenol was affected by age. Irradiation of flies with gamma rays from a 60Co source at a dose rate of 80 [corrected] Gy significantly reduced the amount of volatiles released during calling behavior. The amount of volatiles was lower in recently mated males than virgin males. However, there were no significant differences between virgin males and males 24 h after mating. The presence of host fruit did not affect the amount of volatiles compared with the control.

Se evaluaron dos clases de productos biodegradables; un detergente de uso doméstico (Roma®) y otro clasificado como producto misceláneo (Peak Plus; en trámite de registro) contra ninfas I; ninfas II y hembras adultas de la cochinilla silvestre Dactylopius opuntiae (Cockerell) en condiciones de laboratorio; por el método de aspersión dirigida a cladodios de nopal infestados; Las concentraciones probadas para ambos productos fueron 0;5; 1;0; 1;5; 2;0; 2;5; 3;0 y 6;0%; además se evaluó el efecto de una aplicación repetida de las concentraciones comprendidas de 0;5 a 3;0% sobre las mismas etapas de desarrollo; Se observó una mayor susceptibilidad de ninfas I; teniendo una mortalidad cercana al 50% con 5% del detergente Roma®; mientras que las ninfas II y hembras adultas fueron más susceptibles al Peak Plus; lográndose un control cercano al 50% con las concentraciones de 1;5 y 3;0%; respectivamente; En la aplicación repetida; el efecto mayor se observó en hembras adultas para ambos productos;

Se evaluaron dos clases de productos biodegradables, un detergente de uso doméstico (Roma®) y otro clasificado como producto misceláneo (Peak Plus, en trámite de registro) contra ninfas I, ninfas II y hembras adultas de la cochinilla silvestre Dactylopius opuntiae (Cockerell) en condiciones de laboratorio, por el método de aspersión dirigida a cladodios de nopal infestados. Las concentraciones probadas para ambos productos fueron 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 y 6.0%; además se evaluó el efecto de una aplicación repetida de las concentraciones comprendidas de 0.5 a 3.0% sobre las mismas etapas de desarrollo. Se observó una mayor susceptibilidad de ninfas I, teniendo una mortalidad cercana al 50% con 5% del detergente Roma®, mientras que las ninfas II y hembras adultas fueron más susceptibles al Peak Plus, lográndose un control cercano al 50% con las concentraciones de 1.5 y 3.0%, respectivamente. En la aplicación repetida, el efecto mayor se observó en hembras adultas para ambos productos.