An evaluation of Bacillus thuringiensis israelensis ( AM65 ‐52) treatment for the control of Aedes aegypti using vehicle‐mounted WALS ® application in a densely populated urban area of Puerto Rico

Autor: Patricia Ramírez-Vera, Angela F. Harris, Jose Sanchez Prats, Nicole Nazario Maldonado, Marla García Pérez, Cesar Piovanetti Fiol, Julieanne Miranda-Bermúdez, Marianyoly Ortiz, Peter DeChant
Rok vydání: 2021
Předmět:
Zdroj: Pest Management Science. 77:1981-1989
ISSN: 1526-4998
1526-498X
DOI: 10.1002/ps.6227
Popis: BACKGROUND With a shortage of effective options for control of Aedes aegypti in Puerto Rico due to widespread resistance to conventional mosquito adulticides, an alternative approach was investigated to reduce vector populations. In two areas (totaling 144 ha) of the municipality of Bayamon, Puerto Rico, Bacillus thuringiensis israelensis (Bti) AM65-52 WDG was applied at a rate of 500 g/ha using vehicle-mounted aqueous wide-area larvicide spray applications weekly for 4 weeks and then every other week for a further 16 weeks. Bioassay jars were placed in the field to monitor for deposition of Bti droplets in open spaces, and under vegetation and building coverage. Autocidal gravid ovitraps were placed throughout the field site to monitor the population of adult female Ae. aegypti in both treatment and control sites. RESULTS Larvicide spray was successfully deposited into jars in an array of open and covered locations, as confirmed by larval bioassays. After the fourth weekly spraying, differences in autocidal gravid ovitrap densities were observed between treatment and control sites resulting in 62% (P = 0.0001) and 28% (P
Databáze: OpenAIRE
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