Physiological state influences the antennal response of Anastrepha obliqua to male and host volatiles |
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| Authors: | Humberto Reyes Edi A Malo Jorge Toledo Samuel Cruz‐Esteban Julio C Rojas |
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| Affiliation: | 1. Escuela de Estudios Superiores del Jicarero, Universidad Autónoma del Estado de Morelos, Jojutla de Juárez, México;2. El Colegio de la Frontera Sur (ECOSUR), Departamento de Agricultura, Sociedad y Ambiente, Grupo de Ecología de Artrópodos y Manejo de Plagas, Tapachula, México |
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| Abstract: | The sexual and host‐related behaviours of the fruit fly Anastrepha obliqua Macquart (Diptera: Tephritidae) are mediated by volatile compounds. However, whether the physiological state of this species affects its antennal and behavioural responses to semiochemicals is unknown. The effects of age, mating status, diet and the topical application of methoprene, a Juvenile hormone analogue (JHA), on the antennal sensitivity of this tephritid fruit fly species to selected male (Z)‐3‐nonenol] and host fruit volatiles (ethyl benzoate, ethyl hexanoate, ethyl butyrate and trans‐β‐ocimene) are investigated using electroantennography (EAG). Overall, (Z)‐3‐nonenol and ethyl benzoate elicit the highest EAG responses in both sexes. Flies of both sexes aged 1, 5 and 10 days old show higher EAG responses to the tested compounds compared with flies aged 20 days old. Virgin females and males show higher EAG responses to volatile compounds than mated flies. Females and males fed with sugar plus protein show higher antennal responses to volatiles compared with flies fed sugar or protein alone. Flies of both sexes treated with methoprene show higher antennal responses than flies treated with acetone (control). These results suggest that the peripheral olfactory system in A. obliqua is modulated by the physiological state of the flies. |
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| Keywords: | Age food Juvenile hormone analogue mating olfaction semiochemicals West Indian fruit fly |
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