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2014 ; 5
(4
): 921-41
Nephropedia Template TP
gab.com Text
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English Wikipedia
Innate and Conditioned Responses to Chemosensory and Visual Cues in Asian Citrus
Psyllid, Diaphorina citri (Hemiptera: Liviidae), Vector of Huanglongbing
Pathogens
#MMPMID26462949
Patt JM
; Stockton D
; Meikle WG
; Sétamou M
; Mafra-Neto A
; Adamczyk JJ
Insects
2014[Nov]; 5
(4
): 921-41
PMID26462949
show ga
Asian citrus psyllid (Diaphorina citri) transmits Huanglongbing, a devastating
disease that threatens citrus trees worldwide. A better understanding of the
psyllid's host-plant selection process may lead to the development of more
efficient means of monitoring it and predicting its movements. Since behavioral
adaptations, such as associative learning, may facilitate recognition of suitable
host-plants, we examined whether adult D. citri could be conditioned to visual
and chemosensory stimuli from host and non-host-plant sources. Response was
measured as the frequency of salivary sheaths, the residue of psyllid probing
activity, in a line of emulsified wax on the surface of a test arena. The
psyllids displayed both appetitive and aversive conditioning to two different
chemosensory stimuli. They could also be conditioned to recognize a blue-colored
probing substrate and their response to neutral visual cues was enhanced by
chemosensory stimuli. Conditioned psyllids were sensitive to the proportion of
chemosensory components present in binary mixtures. Naïve psyllids displayed
strong to moderate innate biases to several of the test compounds. While innate
responses are probably the psyllid's primary behavioral mechanism for selecting
host-plants, conditioning may enhance its ability to select host-plants during
seasonal transitions and dispersal.