Repellency of MyggA Natural spray (para-menthane-3,8-diol) and RB86 (neem oil) against the tick Ixodes ricinus (Acari: Ixodidae) in the field in east-central Sweden.
In the field in south-central Sweden, we tested by randomised, standardised methodology the potential anti-tick repellent activity of two concentrations of MyggA Natural spray (containing PMD) (4.2 and 3.2 g/m2) and one of RB86 (with 70% neem oil containing azadirachtin) (3 g/m2) to host seeking nymphs of Ixodes ricinus. Each substance was applied separately to 1 m2 cotton flannel cloths. Nymphal ticks on the cloths, pulled over the vegetation, were recorded at 10-m stops. Nymphal numbers recorded differed significantly between treated cloths [4.2 or 3.2 g MyggA Natural spray/m2 and 3 g RB86/m2] and the untreated control (df = 3, chi2 = 112.74, P < 0.0001). Nymphal numbers also differed significantly among collectors (df = 3, chi2 = 15.80, P < 0.001). Repellency of treated cloths, i.e., 4.2 or 3.2 g MyggA Natural spray/m2 and 3 g RB 86/m2 declined from day 0 (i.e. the day of impregnation) to day 3 after impregnation from 77 to 24%, 58 to 16% and 47 to 0.5%, respectively. This study suggests that all three treatments have significant repellent activities against I. ricinus nymphs.
Garboui
Samira S
SS
Medical Entomology Unit, Department of Systematic Zoology, Evolutionary Biology Center, Uppsala University, Uppsala, SE-75236, Sweden.
Jaenson
Thomas G T
TG
Pålsson
K
K
D000818:Animals; D000081005:Cyclohexane Monoterpenes; D005989:Glycerides; D007302:Insect Repellents; D018884:Ixodes / Q000254:growth & development*; D016014:Linear Models; D008610:Menthol / Q000031:analogs & derivatives*; D011897:Random Allocation; D013548:Sweden; D013729:Terpenes; D013984:Tick Infestations / Q000517:prevention & control*
D000081005:Cyclohexane Monoterpenes; D005989:Glycerides; D007302:Insect Repellents; D013729:Terpenes; D008610:Menthol; C002443:neem oil; C005804:terpin