Loss of ion homeostasis is not the cause of chill coma or impaired dispersal in false codling moth Thaumatotibia leucotreta (Lepidoptera: Tortricidae)

摘要: Dispersal is a central requirement of successful sterile insect release programme, but field-released false codling moth (FCM) typically suffer from poor dispersal ability, especially at low ambient temperatures. Here we test the hypothesis that activity and in FCM caused by delayed or perturbed recovery ion and/or water homeostasis after chilling for handling transport prior to field release. Hemolymph flight muscle were collected two treatment groups three time points targeted thermal conditions above below chill coma induction threshold ~ 6 °C: 1) control moths kept 25 °C, 2) exposed 3 °C 9 °C 4 h, 3) allowed recover 25 °C 24 h exposure either 9 °C. We measured concentrations Na+, K+ Mg2+ hemolymph each point. Exposure chill-coma inducing temperature had little effect overall on balance moth, [Na+] decreased 10.4 ± 0.4 mM 6.9 ± 0.7 mM as chilled then increased 10.4 ± 0.9 mM period. In cooling treatment, [K+] 8.2 ± 0.5 mM during 14.1 ± 1.9 mM No changes seen equilibrium potentials ions measured. Thus, did not find evidence are lost conclude reduced direct consequence costs re-establishment homeostasis.