Efficacy of Residual Bifenthrin Applied to Landscape Vegetation Against Aedes albopictus

Abstract

The daytime biting mosquito Aedes albopictus is a nuisance pest commonly found in suburban yards. The recommended course of treatment for Ae. albopictus is to keep yards free of water-holding containers; however, infestations may require additional control methods such as residual pesticide applications to vegetation. Five plants commonly found in yards or in uncultivated areas in Gainesville, FL were chosen as substrates for evaluation of the effectiveness of residual bifenthrin against 5-7-day-old female Ae. albopictus. Knockdown of mosquitoes after 1 h of exposure was highest the day of and 7 days after treatment. Plant species clearly impacted the effectiveness of residual bifenthrin. One-hour knockdown 7 days after treatment remained high (>62%) only on azalea and holly bush vegetation. Knockdown counts 24 h after exposure demonstrated that residual efficacy of bifenthrin was highest on azalea, with >77% mortality for up to 35 days. Additional bioassays revealed significant differences in the knockdown rates of male, female, gravid, and blood-fed Ae. albopictus exposed to residual bifenthrin treatments, with the highest knockdown observed on the day of and 7 days after treatment.

Behavioral Responses of Two Dengue Virus Vectors,Aedes aegyptiandAedes albopictus(Diptera: Culicidae), to DUET and its Components

“…Asterisks indicate signiÞcant differences between unfed and bloodfed mosquitoes for a particular treatment (paired t-test; P Ͻ 0.05). et al 2011), between sexes (Davidson 1958, Doyle et al 2009), and among blood-feeding status (Davidson 1958, Rawlings et al 1981, Polsomboon et al 2008. Within homes or their immediate surroundings, the common physiological states of Ae.…”

Evaluation of bifenthrin barrier spray on foliage in a suburban eastern North Carolina neighborhood

“…However, the same study chopped up leaves (rather than wiping the leaf surface) and used different extraction methods to the present study. Others have shown differences in mosquito knockdown efficacy owing to different types of plant leaf and application technique, and this may impact on the efficacy of barrier sprays …”

“…Therefore, the August and September resistance tests compared approximately ten field-collected mosquitoes per bottle from control houses with an Ae. albopictus colony (F [13][14][15][16][17][18] ) originating from eggs collected in Greenville in June 2013.…”

Residual Effectiveness of λ-Cyhalothrin Harbourage Sprays Against Foliage-Resting Mosquitoes in North Queensland

“…Knockdown rates were recorded after 1 h. If all mosquitoes in a cup were knocked-down at this stage, they were gently transferred into a clean cup and held for a further 24 h with access to honey solution. Otherwise all mosquitoes in a cup were cold-anesthetized (Doyle et al 2009, Hurst et al 2012 for 2 min and then transferred into clean holding cups. Mortality was recorded after the 24-h holding period.…”

“…albopictus, has increased recently (Hubbard et al 2005, Trout et al 2007, Li et al 2010. Various other residual pyrethroid insecticides have also been tested for the same purpose (Royal 2004, Cilek and Hallmon 2006, Cilek 2008, Britch et al 2009, Doyle et al 2009, Hurst et al 2012). In most cases they have been applied as barrier treatments with an intention to prevent or reduce adult mosquitoes from penetrating into an untreated area targeted for protection (Cilek 2008, Britch et al 2009, Li et al 2010).…”