In Cameroon, the rising incidence of arboviral diseases including dengue, chikungunya, and yellow fever coupled with the nationwide expansion and proliferation of Aedes vector populations necessitate the evaluation of efficient vector control tools in the context of widespread pyrethroid resistance. To address this gap, this study: (i) evaluates the semi-field residual efficacy and remanence of VectoMax^®G across different container types using a range of doses; (ii) investigates the influence of environmental physicochemical parameters (temperature and pH) on larvicide persistence; and (iii) assesses the field-level effect of VectoMax^®G-treated ovitraps on gravid female oviposition preference and adult emergence inhibition. Semi-field bioassays were conducted using local laboratory-reared larvae across three container types (tire, plastic, and metal), testing a range of doses from half to twelve times the recommended WHO dose, with three independent replicates per test group. Remanence of the larvicide was monitored weekly over a 28- to 35-day period, with a threshold of 80% mortality. Additionally, a field trial using 600 ovitraps (300 treated with 0.010 g of VectoMax^®G and 300 controls) was conducted across urban, peri-urban, and rural settings in Yaoundé over four weeks in each study site to evaluate the oviposition preference of gravid females and adult emergence inhibition. The larvicide demonstrated high initial efficacy (100% mortality rate), with remanence significantly influenced by container type and post-exposure duration (p = 0.0013). Used tires provided the longest remanence period, reaching 28–35 days in some replications following a single treatment compared to a maximum of 14 days in plastic and metal containers. The use of supra-normal doses did not consistently extend the remanence period across the breeding containers. Physicochemical analysis via supplementary regression models revealed that pH > 7 was positively correlated with larvicide persistence (p = 0.0321). In the field, treated ovitraps did not deter gravid females searching for suitable oviposition sites; egg colonization rates were similar between treated (67.66%) and control (63.91%) groups (p = 0.058), confirming a lure-and-kill effect. However, adult emergence in treated traps was drastically reduced (n = 76) compared to untreated controls (n = 2727), representing a significant suppression of adult emergence from treated ovitraps. Aedes albopictus was the predominant species collected (59.72%) across all ecological zones. VectoMax^®G demonstrated high initial and residual efficacy against Aedes larvae. Its high performance in tires, the primary breeding habitat of Aedes mosquitoes, and its lack of repellency to gravid females suggest that it may represent a promising component of integrated vector management strategies, though further evaluation is needed to confirm its impact on disease transmission.