Abstract
A standard essential oil mixture (SEOM) was formulated containing volatile compounds in the relative proportions found in the essential oil of the foliage of “Citation,” a strawberry cultivar relatively resistant toTetranychus urticae. Other mixtures contained varied levels, relative to the SEOM, oftrans-2-hexen-1-ol, nonanal, α-terpineol, and methyl salicylate. The behavior ofT. urticae females in response to these mixtures at several concentrations in propylene glycol was studied in choice tube (preference) tests. Feeding effects were measured by incorporating the mixtures and individual components into sucrose with32P. In the choice tube tests, mites were generally attracted by mixtures at concentrations of 0.1% or below unless the level of methyl salicylate was below 0.5 × that in the SEOM, or the level of nonanal was above that of the SEOM. When mixtures were incorporated into food, methyl-salicylate-stimulated feeding and nonanal levels were inversely related to the amount of food ingested.
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Rodriguez, J.G., Kemp, T.R. & Dabrowski, Z.T. Behavior ofTetranychus urticae toward essential oil mixtures from strawberry foliage. J Chem Ecol 2, 221–230 (1976). https://doi.org/10.1007/BF00987745
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DOI: https://doi.org/10.1007/BF00987745