Chemical analysis of female volatiles and field response of the coffee leafminer moth (Lepidoptera: Lyonetiidae), to stereoisomers of its major sex pheromone component

Resumen en español: "Nosotros estudiamos los volátiles emitidos por hembras del minador de la hoja del café, Leucoptera coffeella, colectados en plantaciones de café de la región del Soconusco, Chiapas, México. Nuestros resultados confirman los resultados previos que la hembra de L. coffeella emite (5,9)-dimetilpentadecano como compuesto mayoritario y (5,9)-dimetilhexadecano como minoritario. Los resultados de la evaluación en campo de los estereoisómeros del compuesto mayoritario mostraron que las trampas delta cebadas con (5 S ,9 R )-dimetilpentadecano presentaron capturas significativamente mayores comparadas con las capturas de trampas cebadas con (5 R ,9 R )-dimetilpentadecano, (5 R ,9 S )-dimetilpentadecano y el control. El número promedio de minadores capturados en trampas cebadas con (5 S ,9 S )-dimetilpentadecano fue similar al capturado con (5 R ,9 R )-dimetilpentadecano. Los resultados de este trabajo son discutidos considerando la posibilidad que algunos de estos estereoisómeros puedan ser usados como cebo para el monitoreo del minador de la hoja del café. "

Resumen en inglés: "We analyzed the volatiles emitted by Mexican populations of the female coffee leafminer moth Leucoptera coffeella that were collected in coffee plantations located in the Soconusco region of Chiapas. Our results confirmed previous results that L . coffeella females emitted 5,9-dimethylpentadecane as the major and 5,9-dimethylhexadecane as the minor component. Field response of the coffee leafminer moth to stereoisomers of the major component showed that delta traps baited with (5 S ,9 R )-dimethylpentadecane caught a significantly greater number of coffee leafminer males when compared to those captured by traps baited with (5 R ,9 R )-dimethylpentadecane, (5 R ,9 S )-dimethylpentadecane and the control. The number of coffee leafminer captured by traps baited with (5 S ,9 S )-dimethylpentadecane was not significantly different from the number captured by traps baited with (5 R ,9 R )-dimethylpentadecane. The results are discussed in view of the possibility of using stereoisomers as bait for monitoring the leafminer moth. "