DriftlessRoots2d ago
Colin Purrington
In case anyone needs tick advice. #ticks #ixodida https://colinpurrington.com/2019/06/how-to-protect-yourself-from-ticks/
How to protect yourself from ticks

I spend a lot of time outside, sometimes face-down in the weeds trying to get a photograph of something small. So I have some opinions about tick prevention and thought I'd share. Ixodes scapularis Spray or soak shoes, socks, pants, shirts, hairband, hat, etc., with permethrin (buy online or a

Colin Purrington's blog
Jun 9 at 9:00pmWeb
Show threadMeerderWörter2d ago
@colinpurrington Especially important in Lyme disease and tick-borne encephalitis country
Show thread🍁voilà-DCKIM🍁2d ago
@colinpurrington can anyone verify that cedar oil can keep ticks away?
Show threadColin Purrington2d ago
@dckim Apparently cedar oil can repel nymphs in the lab, but these authors say the needed concentration likely higher to repel adults. Very little research on this. Cedarwood oil yard sprays work, but it seems just barely and don't last long. I think the consensus is that you should not rely on cedarwood oil. I have never been tempted because I know so many people who have contracted tick-borne diseases. I use DEET and such. CDC does not list cedarwood oil on its page of tick repellents. I would avoid. https://link.springer.com/article/10.1007/s10493-022-00692-0
Repellency and toxicity of a CO2-derived cedarwood oil on hard tick species (Ixodidae) - Experimental and Applied Acarology

The repellency and toxicity of a CO2-derived cedarwood oil (CWO) was evaluated against actively questing unfed nymphs of four species of hard ticks: Amblyomma americanum (L.), Dermacentor variabilis (Say), Ixodes scapularis Say, and Rhipicephalus sanguineus (Latreille). Using a vertical climb bioassay for repellency, nymphs of these species avoided a CWO-treated filter paper in proportional responses to treatment concentrations. At 60 min of exposure, I. scapularis nymphs were most sensitive with 50% repellency concentration (RC50) of 19.8 µg cm−2, compared with RC50 of 30.8, 83.8 and 89.6 µg cm−2 for R. sanguineus, D. variabilis and A. americanum, respectively. Bioassays determined the lethal concentration for 50% (LC50) and 90% (LC90) mortality of nymphs exposed to CWO in treated vials after 24- and 48-h exposure. After 24 h exposure, the LC50 values were 1.25, 3.45 and 1.42 µg cm−2 and LC90 values were 2.39, 7.59 and 4.14 µg cm−2 for D. variabilis, I. scapularis and R. sanguineus, respectively, but had minimal effect on A. americanum. After 48 h exposure, the LC50 values were 4.14, 0.78, 0.79 and 0.52 µg cm−2, and LC90 values were 8.06, 1.48, 1.54 and 1.22 µg cm−2 for A. americanum, D. variabilis, I. scapularis and R. sanguineus, respectively. The repellency of CWO on tick species decreased with time. The repellency and toxicity bioassays demonstrated concentration-dependent responses of tick nymphs to the oil, indicating the potential of the CO2-derived cedarwood oil be developed as an eco-friendly repellent and/or acaricide.

SpringerLink