Fig. 4. Nepetalactol is a potent mosquito repellent.

(A) A test cage to assess mosquito repellency. Fourteen to 22 mosquitoes were placed into an acrylic cage that had a plastic bag as a shelter into which the mosquitoes could move. A dish containing the test stimulus (arrow) was placed on the floor of the cage. (B) Mosquito (A. albopictus) repellency (mean ± SEM %) of nepetalactol (2 mg, 200 μg, and 50 μg), five fresh silver vine leaves, or solvent control (n = 4). P values from ANOVA planned contrasts to the control stimulus. Photo credit: (A) Reiko Uenoyama, Iwate University.