Rd. Xue et al., INFLUENCE OF BODY-SIZE AND AGE OF AEDES-ALBOPICTUS ON HUMAN HOST ATTACK RATES AND THE REPELLENCY OF DEET, Journal of the American Mosquito Control Association, 11(1), 1995, pp. 50-53
Human host attack rates and the repellency of deet (25% in ethanol) to
nulliparous Aedes albopictus in the laboratory were significantly inf
luenced (P = 0.05) by mosquito age and body size and by the interactio
n of age and body size. Host attack rates were higher for 20-day- (24.
5%) and 15-day-old females (22.9%) than for 10- (15.1%) and 5-day-old
females (11.0%), regardless of body size, and for large females (22.2%
) compared with small females (16.6%), regardless of mosquito age. Dee
t on human skin repelled small-bodied females longer (3.87 h) than lar
ge females (2.31 h); 15-day-old females were repelled longer (3.75 h)
than 5- (2.33 h), 10- (3.08 h), or 20-day-old females (3.07 h), regard
less of body size. Host attack rates and deet repellency among 15-day-
old parous and 15-day-old nulliparous large- and small-bodied female A
e. albopictus were similar but deet repellency was less (by approximat
e to 2 h) against large females compared with small-bodied females.