Leaf litter band at a woodland edge beside a mown yard in low evening sun

Tick Control (In Development)

Vegalab is developing a geraniol-based tick control product for yards, perimeters and animal premises. It is not for sale. The evidence points to strong repellency and a dose requirement well above our current crop rate, and the program exists to close that gap and prove residual.

What the evidence shows

Published and estimated geraniol endpoints for ticks point the same way: larval LC50 of about 6.6 mg/mL for pure geraniol (R. microplus), higher estimated values for unfed adult R. sanguineus, higher again for engorged female R. annulatus (estimated from geranium-oil studies), and larval LC95 of about 11.1 mg/mL for R. microplus. Spider Mite Control at its 1:500 crop rate delivers about 0.57 mg/mL. A tick product therefore needs roughly 1:50 for median kill and 1:25 for reliable kill, 10 to 20 times the spider mite rate. We found no published geraniol mortality data against tick nymphs, the stage most encountered in yards.

Repellency and residual

Repellency data are stronger than mortality data. In a field study on cattle, 1% geraniol reduced Hyalomma tick counts by 98.4%, 97.3% and 91.3% at days 7, 14 and 21. The weak point for botanicals is field residual: unencapsulated essential oils hold for a few days against ticks, and a commercial botanical acaricide showed no significant residual activity after two weeks of weathering. Encapsulation has changed this for another terpene: lignin-encapsulated nootkatone held 100% control of blacklegged tick nymphs for 8 weeks in one season, while a plain emulsion fell to zero by week 3.

Two ground strips over time: free oil fading quickly beside capsules that keep releasing through the season — The program aims to turn geraniol's strong repellency into residual activity that lasts through the active season. It is not for sale.

Trial design

The plan runs a USDA-ARS larval packet test on the formulation as made, adds an Ixodes scapularis nymph arm to fill the nymph data gap, and compares encapsulated and neat geraniol at days 1, 7, 14 and 28 on leaf litter and vegetation. Blend partners are chosen with care: geraniol is antagonistic with thyme and savory oils against Ixodes, so those will not be combined. Results will be reported by life stage and by day, with neat controls.

Path to label

If trials support it, the product will carry a minimum-risk label for ticks on outdoor sites and animal premises, with no disease claims, followed by state acceptance. The label covers premises and vegetation. If the concentration needed for reliable kill proves impractical, the product may be positioned on repellency or on specific life stages instead, and the label will say only what the data support. Pricing and territories will be set with distributors after trial results.

Key facts

1% geraniol reduced Hyalomma tick counts on cattle by 98.4%, 97.3% and 91.3% at days 7, 14 and 21 (Khallaayoune et al. 2009, Parasite 16:223)
Geraniol larval LC95 against Rhipicephalus microplus is about 11.1 mg/mL (Singh et al. 2018, Ticks Tick Borne Dis 9:201)
Lignin-encapsulated nootkatone gave 100% control of blacklegged tick nymphs for 8 weeks in a 2009 residential trial, while an emulsifiable formulation fell to 0% by week 3 (Bharadwaj et al. 2012, J Med Entomol 49:1035)
Minimum-risk labels may not claim control of ticks that carry specific diseases (40 CFR 152.25(f)(3))

How our delivery technology applies

The dose gap and the residual gap are linked. A 1:25 geraniol spray that evaporates within days is costly and still fails the next questing cohort. Multi-layer encapsulation slows geraniol loss from leaf litter and vegetation and releases it over time, so the concentration at the surface stays above the tick threshold longer. The trial measures exactly that, encapsulated against neat, over 28 days.

Research groups and pest management firms: apply to run a Tick Control trial arm.