Pheromone study on acarid mites citral composition and function as an alarm pheromone and its secretory gland in 4 species of acarid mites

Kuwahara, Y.; Matsumoto, K.; Wada, Y.

Medical Entomology and Zoology 31(2): 73-80


Accession: 006102807

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Bioassay and biological investigations were made on alarm pheromones of 5 spp. of acarid mites, Aleuroglyphus ovatus, Carpoglyphus lactis, Lardoglyphus konoi, Tyrophagus putrescentiae and Dermatophagoides farinae. Citral and neryl formate were active as an alarm pheromone and not strictly species-specific within the 5 spp. Along with T. putrescentiae, 2 more acarid mites, C. lactis and L. konoi, possess the alarm pheromone, and citral was identified as their pheromone. Citral was emitted and the quantity of this discharge was 10-50 times larger when mites were disturbed than when undisturbed. The composition of citral differed significantly between the disturbed (74-86% of neral) and undisturbed conditions (54-66% of neral), i.e., the percentage of neral increased when disturbed. The original composition of extracted citral at < 1 min soaking consisted of > 90% of neral in 3 spp. except L. konoi (75% of neral). The initial composition of citral when discharged from glands consists of > 90% of neral in 3 spp. L. konoi, A. ovatus and D. farinae. The secretory gland of citral was identified as the latero-abdominal gland or the oil gland in all species of mites.