Phloxine B accepts glycogen metabolism in larval stages of Ceratitis capitata (Diptera: Tephritidae)

BERNI,J., RABOSSI, A., PUJOL-LEREIS,L.M., TOLMASKY, D.S. AND QUESASA-ALLUÉ, L.A

PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY

Elsevier

Año: 2009

0048-3575

Abstract             Xanthene dyes have been tested as photoinsecticides on different dipteran species. Phloxine B ingested by Ceratitis capitata larvae showed low toxicity under dark conditions and acute light-dependent toxicity when the insects were exposed to light during the dispersion stage before pupariation. In this study we show that sub-lethal concentrations of phloxine B generated subtle changes in weight gain and in the accurately regulated jumping behavior of metamorphosing larvae. These changes are correlated with a strong accumulation of glycogen in fat body, intestine and muscles, as well as with an inhibition of the glycogen phosphorylase activity. These results suggest that some of the non-phototoxic effects of phloxine B might be caused by an alteration of the glycogen catabolism, which can eventually affect the viability of the flies.