Seasonal occurrence of Aedes albopictus in mountainous- and urban areas

Abstract

Number of cggs 。 f Aedes atb 叩 ictl ' s was moni 吐 ored usin8 b且 u 巳 plastic conlainers ( 14 cm in diamcter and 17 ． 5 cm in depth)lincd wi 山 apiece ef fillcr paper ( 15 x 46 cm ) ， Twenty ovitraps with 1 臨 ter of wal じr we 爬 placod on a small hM ， Gubiro− gaoka， on the campus of Nagasaki Universiヒ y School of Modicjne f【om May 11， 1999 【o S¢ P 霍 e皿 b。r 30 ， 1999・ lhe filter papers wcre cha 願 gcd every 24 hours from Monday ［ o Thursday and lhe n ロmbe π of eggs deposi こ cd on the flller papers was oo 聞 ted． Distances of ovitr 叩 s from hロ man dweLlings and sunlight exposure were atso m 巳as ・red ． 0 ・ itraps wa1er q 岨 ： ity such as pH ， ［ emp 巳 rature ， watcr depth 己nd Chemical Oxygen Demand ( COD ) were also mcasured on the weeklybasis ， Oviposi吐io口 of Ae ， alb ρpicttas s 【 aF ［ ed in May and ヒ he uverage numb じr of eggs ！ ovitrap increas 己 d untll Sop電 embe 【 ． A ヒ o 監 al D ロ mber of 19， 041 ・fAe ・ alb ・ pictus eggs were c・11ected with the average ・ f 22」 egg5 ！ ovi 星 rap during the s 噫 udy p¢ riod ． Tliere wcre significun 【 diff じr¢ 員c ¢ s in the average numbcr of eggsiovitrap ame 日 9 巳 he ovitraps and mon 【 hly averagc of number ef eggslovitrap bctwcen the mon こ hs， Slatis 星 ica1跚 1ysis of 。nvironmen ［ al factors showed 山 a ロ hcτ。 was an