Abstract
We used bioassays to evaluate the arrestment response of male twospotted spider mite, Tetranychus urticae Koch, and Banks grass mite, Oligonychus pratensis (Banks) to whole-body extract from conspecific quiescent deutonymphs. We examined the effect of previous behavior on mite response to extract from female quiescent deutonymphs. We also examined male arrestment and guarding behavior in response to 2 extract concentrations and to extract from male quiescent deutonymphs. Male T. urticae and O. pratensis exhibited similar changes in their behavior in response to the different extracts with which we presented them. Males that were guarding quiescent deutonymphs immediately prior to testing spent more time in an untreated 3.5-mm-diameter circle than did males that were previously engaged in other behaviors. However, when nonguarding males were presented with extract of conspecific female quiescent deutonymphs they remained in the stimulus circle as long as guarding males did in an untreated circle. Arrestment duration of nonguarding males increased at 2 higher extract concentrations. The arrestment response was not exclusive to extracts from female quiescent deutonymphs; nonguarding male mites were also arrested by extracts from male quiescent deutonymphs, although for a shorter time. Duration of arrestment was related roughly to size differences between male and female quiescent deutonymphs. Furthermore, males did not show an exclusive preference for guarding conspecific male or female quiescent deutonymphs. It seems unlikely that the arrestant is a specific sex pheromone. Rather, male mites probably use the arrestant as a necessary cue to focus their attention on an individual that may be a suitable mate. Other tactile, visual, and chemical stimuli may then help males to decide whether to remain and assume mate guarding behaviors.
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Margolies, D.C., Collins, R.D. Chemically-mediated pre-mating behavior in two tetranychid species. Exp Appl Acarol 18, 493–501 (1994). https://doi.org/10.1007/BF00051471
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DOI: https://doi.org/10.1007/BF00051471