Figure 4From: Field trial on a novel control method for the dengue vector, Aedes aegypti by the systematic use of Olyset® Net and pyriproxyfen in Southern VietnamA comparison of the density (mean±S.E.) of pupae among different types of containers: those with no lid (NL), with gapped lids (GL), and with fitted lids (FL) from August 2008 to February 2009. (A) Trial area. (B) Control area. The treatment was carried out in September, 2008.Back to article page