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2 resultados encontrados para: TEMA: Similares a las hormonas juveniles
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- Artículo con arbitraje
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Physiological state influences the antennal response of Anastrepha obliqua to male and host volatiles
Reyes Hernández, Humberto ; Malo Rivera, Edi Álvaro (coaut.) ; Toledo, Jorge (coaut.) ; Cruz Esteban, Samuel (coaut.) ; Rojas, Julio C. (coaut.) ;
Contenido en: Physiological Entomology Vol. 42, no. 1 (March 2017), p. 17–25 ISSN: 1365-3032
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

The sexual and host-related behaviours of the fruit fly Anastrepha obliqua Macquart (Diptera: Tephritidae) aremediated 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.

*En hemeroteca, SIBE-Tapachula
Juvenile hormone analogs greatly increase the production of a nucleopolyhedrovirus
Lasa, Rodrigo ; Caballero, Primitivo (coaut.) ; Williams, Trevor (coaut.) ;
Contenido en: Biological Control Vol. 41, no. 3 (2007), p. 389-396 ISSN: 1049-9644
Bibliotecas: Tapachula
SIBE Tapachula
43565-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Tapachula
Resumen en: Inglés |
Resumen en inglés

The commercial production of baculovirus insecticides is limited by the need to produce the virus in living insects. The influence of juvenile hormone analogs (JHA) on the growth and survival of Spodoptera exigua larvae placed on treated diet in the fifth instar was examined. Weight increases observed in methoprene- and fenoxycarb-treated larvae were over three-fold greater than that of control insects, whereas other compounds resulted in lower weight gains (pyriproxyfen) or highly variable responses (hydroprene). Approximately 90% and 70% of fenoxycarb and methoprene-treated larvae, respectively, molted to a supernumerary sixth instar and attained a final weight at 8–10 days post-treatment that was approximately double the maximum weight observed in control larvae. Inoculation of fenoxycarb and methoprene-treated sixth instars with a nucleopolyhedrovirus (SeMNPV) resulted in 2.4- or 2.9-fold increases in final weights, compared to control larvae inoculated in the fifth instar. The total yield of SeMNPV occlusion bodies (OBs) per larva was 2.7- and 2.9-fold greater in fenoxycarb- and methoprene-treated larvae, respectively, compared to fifth instar controls. A significant but small increase in the yield of OBs/mg larval weight was observed in fenoxycarb-treated insects but not in the methoprene treatment. The LC50 value of OBs harvested from fenoxycarb-treated insects was slightly higher than that of OBs from control insects, whereas no such difference was observed in OBs from methoprene-treated insects. We conclude that appropriate use of JHA technology is likely to provide considerable benefits for the mass production of baculoviruses.