Some knowledge on the biology of Aedes albopictus Skuse

Abstract

A study on the biology, especially on the egg laying, development and the survival of the adult of Aedes albopictus SKUSE was carried out in 1965 and the following results were acquired : 1. About 80% of the number of the blood-sucked female adults gathered in summer from the bush at the beginning of the study, normally laid their eggs in the rearing container. They laid out 80% of the number of eggs for 3-5 days after the introduction of the female adults under the constant temperature of 25℃. 2) The total number of eggs laid out per female mosquito is about 80 on the average. 3) The developmental period in days of each stage of this species of mosquito is : egg 8.1 days, larva 10.2 days, pupa 5.9 days and total 24.3 days under the temperature of 20℃, egg 3.8 days, larva 7.5 days, pupa 2.4 days and total 13.7 days under 25℃ temperature, and egg 3.8 days, larva 5.9 days, pupa 2.3 days and total 12.0 days under 30℃ temperature. As the developmental zero point the following values are presumed : 10°-11℃ for egg, 9℃ for larva, 11.5°-13.5℃ for pupa and 9°-10℃ for all the developmental stage. 4) The duration of survival of the adult male is shorter than that of the female under 25℃. Generally speaking, they live for 6-7 days on the average in the rearing with water only and for 21-26 days in that with 20% sugar water respectively. However, the duration of their survival seems to become longer to some extent than the duration above mentioned, if the rearing container is suitable enough.