Autor(es): Harwood James F; Farooq Muhammad; Turnwall Brent T; Richardson Alec G

Resumo: The principal vectors of chikungunya and dengue viruses typically oviposit in water-filled artificial and natural containers, including tree holes. Despite the risk these and similar tree hole-inhabiting mosquitoes present to global public health, surprisingly few studies have been conducted to determine an efficient method of applying larvicides specifically to tree holes. The Stihl SR 450, a backpack sprayer commonly utilized during military and civilian vector control operations, may be suitable for controlling larval tree-hole mosquitoes, as it is capable of delivering broadcast applications of granular and liquid dispersible formulations of Bacillus thuringiensis var. israelensis (Bti) to a large area relatively quickly. We compared the application effectiveness of two granular (AllPro Sustain MGB and VectoBac GR) and two liquid (Aquabac XT and VectoBac WDG) formulations of Bti in containers placed on bare ground, placed beneath vegetative cover, and hung 1.5 or 3â??m above the ground to simulate tree holes. Aedes aegypti (L.) larval mortality and Bti droplet and granule density data (when appropriate) were recorded for each formulation. Overall, granular formulations of Bti resulted in higher mortality rates in the simulated tree-hole habitats, whereas applications of granular and liquid formulations resulted in similar levels of larval mortality in containers placed on the ground in the open and beneath vegetation.

Palavras-Chave: Aedes aegypti; Stihl SR 450; backpack sprayer; ground applications; larval mosquito control

Imprenta: Journal of Medical Entomology, v. 52, n. 4, p. 663-671, 2015

Identificador do objeto digital: https://doi.org/10.1093/jme/tjv043

Descritores: Aedes aegypti - Flaviviridae ; Aedes aegypti - Pathogenesis ; Aedes aegypti - virus ; Aedes aegypti - Dengue ; Aedes aegypti - Public health

Data de publicação: 2015

INDICADORES

ACESSO