Untersuchungen über Pherom one bei Formica polyctena (Förster) / Studies on the Pheromones of Formica polyctena (Förster)

Abstract
Methyl-3-isopropylpentanoate is identified from the heads of workers and in higher concentration from heads of old queens of Formica polyctena (Förster). In laboratory bioassays this terpenoid ester showed a strong aggression inhibiting effect. While in the abdomina of workers the alarm pheromone undecane is the main compound it is almost completely absent in the abdomina of old queens.

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