As wet weather continues into spring and rain harvesting becomes an increasingly interesting hobby, what comes next may be nagging mosquitoes. They love standing water, but even moisture in your lawn is enough to allow them to reproduce. Gnats also love to nest in a moist lawn. Pretty soon, mosquitoes are biting at your ankles every time you mow the lawn, and clouds of gnats are hovering above your beautiful carpet of green.

If the idea of a toxic chemical pest control defeats your pursuit of a green environment, then consider a natural pest control like pyrethrins. Pyrethrins are derived from chrysanthemums, and they may be used in a variety of products from flea abatement on pets and head-lice removal on humans to mosquito abatement in public areas.

Pyrethrins permeate an insect’s nervous system on contact and paralyze the insect. There is no residual effect of the pyrethrins, which means it needs to be reapplied. Although it’s natural, there can be some toxicity if pyrethrins are ingested, but humans usually break it down easily and quickly without any long-term effects. Side effects for humans can reportedly be a rash, runny nose, and coughing, which might be an allergic reaction to the compound.

The downside is that pyrethrins can be more expensive than regular pesticide. If you have small children or pets, the extra cost may be worth it to keep them away from anything with dangerous side effects.

Pyrethrins are sold in outdoor foggers for mosquito abatement as well as in powder form. Keep an eye on your watering between the rains so you don’t over water your lawn and create a worse problem. Pyrethrins may help you have a spring and summer without mosquitoes.