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Published on: January 24, 2011
Olfactory conditioning improves the predation efficacy of the predatory mite Amblyseius largoensis
Syed Usman Mahmood1, Asim Munawar2, Xuan Chen2
1Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou, China.
Background:
Olfactory conditioning, a key manifestation of behavioral plasticity, is known to enhance insect fitness in nature. It remains unclear, however, whether predatory mites-which share a common arthropod ancestry with insects but belong to a distinct evolutionary lineage-have a comparable capacity for olfactory conditioning. To bridge this knowledge gap, we assessed associative olfactory learning in the predatory mite Amblyseius largoensis by exposing it to herbivore-induced plant volatiles (HIPVs) from citrus plants infested with its prey, Panonychus citri.
Results:
Trained mites showed preference shifts toward these herbivore-associated chemical signals, requiring less time to locate prey, consuming more prey individuals and producing more eggs than naive counterparts. Individual HIPV compounds (α-farnesene, humulene, linalool, β-ocimene, caryophyllene) each demonstrated unique training effectiveness, whereas cross-reactivity bioassays revealed hierarchical chemical information processing with both compound-specific and categorical responses.
Conclusion:
The success of olfactory training suggests that the mite chemosensory system provides reliability for ecological applications where consistent, robust conditioning responses are essential for predation effectiveness. © 2026 Society of Chemical Industry.
