Resistance to a mating disruptant composed of (Z)-11-tetradecenyl acetate in the smaller tea tortrix, Adoxophyes honmai (Yasuda) (Lepidoptera: Tortricidae).

Abstract

At tea fields in Shimada in Shizuoka Prefecture, a mating disruptant composed of (Z)-11-tetradecenyl acetate (trade name: Hamaki-con) had been used for controlling Adoxophyes honmai (Yasuda) annually since 1983. In 1986, four years after use of the disruptant was initiated, the disruption percentage of pheromone trap catches was 96%, and a high control effect was observed. However, from 1996 to 1998, 14 to 16 years after treatment was started, the percentages became less than 50%. When the disruptant was applied in other tea fields where it had not been previously used, the disruption percentages were over 99%. These results strongly suggest the possibility that a selection pressure caused by continuous use of the disruptant should have caused the low disruption percentage in Shimada. We propose that the phenomenon be termed "resistance" to a mating disruptant composed of (Z)-11-tetradecenyl acetate in A. honmai. When the sex pheromone blend of A. honmai, 63 : 31 : 4 : 2 mixture of (Z)-9-tetradecenyl acetate, (Z)-11tetradecenyl acetate, (E)-11-tetradecenyl acetate and 10-methyldodecyl acetate (4-component blend), was applied as a disruptant for the "resistance" population, the disruption percentage was 99% and the larval density in the next generation decreased. These results suggest that the 4-component blend is useful as a control tool for the "resistance" population.

Divergence in behaviour between the European corn borer,Ostrinia nubilalis, and its sibling speciesOstrinia scapulalis: adaptation to human harvesting?

“…Ostrinia furnacalis in Asia is an interesting candidate for such an investigation of parallel evolution, since it may result from an independent host shift to maize (Frolov et al 2007). If, as we strongly suspect, geotaxis proves to have evolved as a specific response to harvesting techniques, this would constitute a very singular instance of behavioural resistance to agricultural management techniques other than insecticide application (Levine et al 2002;Mochizuki et al 2002;Miller et al 2009). …”

Identification of the sex pheromone secreted by Synanthedon hector (Lepidoptera: Sesiidae)

“…Recently, Mochizuki et al (2002) reported a resistant strain of the smaller tea tortrix, Adoxophyes honmai, against its mating disruptant, Hamaki-con…”

“…Hamakicon ® simultaneously disrupted the communications of another tortricid pest species, Homona magnanima, in tea gardens, but could induce the evolution of a resistant strain. This problem has been resolved by a new disruptant, including all components produced by females (Mochizuki et al, 2002). Because mating disruption is a modern and unique technique, it is possible that similar unexpected problems will take place during application in the field.…”

Sexual behavior of the navel OrangeWorm, Amyelois transitella (Walker) (Lepidoptera: Pyralidae)

“…However, use of a single component in mating disruption is less effective than a mixture. In addition, it was demonstrated with another lepidopteran species that continuous use of a single pheromone constituent in mating disruption may lead to "resistance", which can be avoided with a multi-component pheromone system (Mochizuki et al 2002).…”