Effect of storage of pheromone lures for Amyelois transitella: field performance and compound ratios

Authors

  • Charles Burks USDA, Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center
  • Cristofer Wilk Scientific Methods Inc. Durham, CA 95938-0599

Keywords:

navel orangeworm, pheromone, monitoring

Abstract

Summary

Experiments during the flight of the overwintering generation of navel orangeworm revealed that Suterra NOW Biolure pheromone lures held in storage at –20 °C increased significantly in field effectiveness with time in storage over a period of 0 to 2 years. This increase in field effectiveness coincided with an increase in emission of (Z,Z,Z,Z,Z)-3,6,9,12,15-tricosapentaene as a proportion of (Z,Z)-11,13-hexadecadienal. These observations indicate that users should not presume equal effectiveness when lures are held over from the previous year, and suggest that manufacturers could improve lure effectiveness by increasing the proportion of (Z,Z,Z,Z,Z)-3,6,9,12,15-tricosapentaene in the lure emission.

 

Sumario

Investigaciones durante el vuelo de Amyelois transitella que emergieron de larvas nacidas en el año pasado revelaron que los cebos de feromonas, “Suterra NOW Biolure”, atrajeron significativamente más machos sobre un periodo desde 0 hasta 2 años con temperature de –20 °C. También incrementó significativamente la proporción de (Z,Z,Z,Z,Z)-3,6,9,12,15-tricosapentaene entre los compuestos emitidos por los cebos guardados en este tiempo. Estas observaciones indican que los que usan estos cebos no deben de suponer que la atracción es igual entre cebos nuevos y los conservados desde el año pasado, y también sugieren que los fabricantes podría hacer más eficaz los cebos con un aumento de la proporción de (Z,Z,Z,Z,Z)-3,6,9,12,15-tricosapentaene entre los compuestos emitidos.


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Published

2018-04-24

Issue

Vol. 100, No. 4 (December 2017)

Section

Scientific Notes

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