Investigation of resting place of adult Aedes albopictus in suburban areas, and its phototaxis.

2019 Fiscal Year Final Research Report

• Project/Area Number: 17K09155
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Hygiene and public health
• Research Institution: Shinshu University
• Principal Investigator: HIRABAYASHI KIMIO 信州大学, 学術研究院繊維学系, 教授 (20222250)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Keywords: ヒトスジシマカ / 感染症媒介蚊 / 植物群落 / 休息場所 / 蚊成虫防除 / 走光性 / 波長 / 都市近郊

Outline of Final Research Achievements

In order to investigate high density resting places of adult Aedes albopictus in the daytime, using the net cylinder insect catcher that we made, we covered various types of plants and counted the number of captured insects. A. albopictus rested at high density in the following environments: shaded places and plants with big leaves and thick growth. Moreover, A. albopictus preferred places that were easy to approach source of blood to suck, e.g., humans and animals.
On the other hand, using the LED light equipment which we made, we investigated the adult phototaxis in response to the different wavelengths (white color LED lamp, red, blue green, amber, UV and white color lamp which covered by a linearly polarized light filter). As a result, captured A. albopictus numbers are not significant among the LED lamps. In addition, a pulsed white LED-lamp did not attract as many as the continuous emission white LED lamp.

Free Research Field

衛生動物学

Academic Significance and Societal Importance of the Research Achievements

ヒトスジシマカ成虫の休息場所が明らかになれば、ヒトが吸血される可能性の高い場所が明確となり、感染ハイリスク地点が明確になる。薬剤散布などの防除のエリアが明確となり、現在と比較して薬剤散布量を減少させることができ、IPMに即した効率的な成虫防除作業が実施できる。また、成虫の休息しやすい特徴をもつ植生を人家周辺から遠ざけたり、公園植生などでもこの様な視点で植物種を選考したりすると、感染症媒介蚊の吸血防止策にも役立つと思われる。