<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Entomopathogenic nematodes have been evaluated for control of mosquito species for decades. Depending on the nematode and mosquito involved, mortality rates of larvae (L) may reach 100% in vitro. Nonetheless, nematode efficacy at oviposition sites has rarely been assessed. <italic>Heterorhabditis indica</italic> LPP35 has been shown to kill over 75% of <italic>Aedes aegypti</italic> L3/L4 in cups and bottles outdoors. To assess its efficacy in indoor oviposition sites, different types/sizes of floor drains and pot saucers, and 65 liter water barrels, were infested with L3/L4 and treated with two doses of infective juveniles (IJs). In floor drains, mortality rates varied from 45 to 82%, with better results in the smallest drains. The adjustable dose of 25 IJs/cm<sup>2</sup> of the drain’s bottom internal surface gave better results than the fixed dose of 100 IJs/larva. Mortality rates were only 28 to 53% and 0.1 to 1.7% in pot saucers and water barrels, respectively, probably because ridges and grooves that marked the bottom internal surface of these containers hindered the encounter of larvae and IJs.</p>
</abstract>

Entomopathogenic nematodes have been evaluated for control of mosquito species for decades. Depending on the nematode and mosquito involved, mortality rates of larvae (L) may reach 100% in vitro. Nonetheless, nematode efficacy at oviposition sites has rarely been assessed. Heterorhabditis indica LPP35 has been shown to kill over 75% of Aedes aegypti L3/L4 in cups and bottles outdoors. To assess its efficacy in indoor oviposition sites, different types/sizes of floor drains and pot saucers, and 65 liter water barrels, were infested with L3/L4 and treated with two doses of infective juveniles (IJs). In floor drains, mortality rates varied from 45 to 82%, with better results in the smallest drains. The adjustable dose of 25 IJs/cm2 of the drain’s bottom internal surface gave better results than the fixed dose of 100 IJs/larva. Mortality rates were only 28 to 53% and 0.1 to 1.7% in pot saucers and water barrels, respectively, probably because ridges and grooves that marked the bottom internal surface of these containers hindered the encounter of larvae and IJs.

Efficacy of <italic>Heterorhabdits indica</italic> LPP35 against <italic>Aedes aegypti</italic> in domiciliary oviposition sites

Journal of Nematology

This work is licensed under the Creative Commons Attribution 4.0 International License.

Efficacy of  LPP35 against  in domiciliary oviposition sites

running-head

Entomopathogenic nematodes have been evaluated for control of mosquito species for decades. Depending on the nematode and mosquito involved, mortality rates of...

Efficacy of Heterorhabdits indica LPP35 against Aedes aegypti in domiciliary oviposition sites

Article Category: Arts & Humanities

Publié en ligne: 23 juil. 2019

Pages: 1 - 7

Reçu: 01 mai 2019

DOI: https://doi.org/10.21307/jofnem-2019-050

© 2019 Bruna Silva et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.