Long-term storage and viability of Ochlerotatus albifasciatus eggs (Diptera: Culicidae)

CAMPOS, R. E.

MEMóRIAS DO INSTITUTO OSWALDO CRUZ.

Instituto Oswaldo Cruz

Lugar: Rio de Janeiro; Año: 2008 vol. 103 p. 115 - 117

0074-0276

The viability of Ochlerotatus albifasciatus (Macquart) eggs stored at room temperature and at 5ºC was studied over 31 months. After 12, 18 and 31 months of storage, eggs were acclimatized at 22ºC for 10 days, and then inundated twice every 7 days. The effect of the storage period on the percentage of hatching was analyzed by one way ANOVA. Differences on the hatching response between the first and second flooding were analyzed by paired t-test. Differences on the hatching response between the two storage conditions were analyzed by Mann-Whitney rank test. Results showed that (1) Oc. albifasciatus eggs were able to survive and hatch over 31 months; (2) the percent hatching of eggs stored at 5ºC was higher than that of eggs stored at room temperature; and (3) low temperatures and long periods without water favor installment hatching.