Over the weekend we read about some recent studies showing that plant essential oils from common herbs—specifically rosemary, thyme, clove, and mint—can be effective as natural pesticides. Apparently just a few drops of the plant oils mixed with water can repel or kill destructive aphids and mites. This seems like great news for those trying to grow veggies and fruit at home without the use of harmful chemicals...

The BBC reports that while the herb-based oils may not last as long or be quite as potent as chemical solutions, they do repel, or in some cases kill, potentially damaging pests, and they're safer for farm workers (or, for that matter, home gardeners and their kids and pets). Scientists are studying ways to increase the potency and durability of herbal essential oils for this purpose, so that they might become more widely used for commercial crops.
In your home garden, do you experiment with natural pest control solutions? Have you tried herbal oils? We'd love to hear the results!
To read the full story on the recent studies, visit the BBC online.
(Images: Flickr members ccharmon and Jasmine&Roses, licensed under Creative Commons)
I didn't know that. I have plants in my house and would really like a better solution for dealing with bugs. I'll try these oils and see how they work. Order Checks Online
view orderchecks's profile
plant sweet basil with your tomato plants, it will keep the horn worms away. Last year i had the worms everywhere, this year nothing. Seems to work and saves me work.
view jmorey's profile
You might be surprised to know that one of the more common pesticides comes from plants, specifically a type of chrysanthemum.
http://en.wikipedia.org/wiki/Pyrethrin
I'm not a proponent of pesticide use in general. That a pesticide comes from an organic (and I'm using this in the older, chemical sense of the word) source, doesn't mean much.
view sciencegeek's profile
Chrysanthemums are a stunningly effective natural control.
You can just grow them around things that get munched or get various diseases and VOILA, no problem. I swear these plants suck the bad stuff out of the soil! Roses that had to be constantly sprayed for black spot are blemish free this year after being inter-planted with mums.
I have read many recipes for making sprays from them but I just skip that step and grow chrysanthemums around my flower and veggie beds. I was not all that fond of mums until I discovered how good they are FOR your garden, now they look better to me every day.
Mums are cheap too.
For the cost of one bottle of bug spray I have an apparently effortless lifetime supply of what my expanding garden needs. Mums spread easily and I just yank some out by the roots and throw some into new beds or new plantings.
view witchdoc's profile
I read (from a garden/chef) that planting lavender, rosemary, or sage around the perimeter of your veggie bed will repell snails. I planted lavendar around my green beens and the snails, that chowed down on the leaves before, haven't returned since.
view youngbloop's profile
i control insects in my garden by planting basil and marigolds around my tomatoes. the basil is very close (touching) the tomatoes. the marigolds are all around my little garden. so far, i've been aphid free for two summers!
view leah belle's profile
rosemary will repel mosquitos too, I think! next year I'm putting marigolds in my veggie garden, b/c I lost some good lettuce leaves to some pesky earwigs =(.
view lovelyrita's profile
i have some tiny black bugs, like microscopic flies, crawling around in some of my planters, any idea what they could be? or what will help get rid of them?
view hla21's profile
hla21, could they be fungus gnats?
http://www.entomology.wisc.edu/insectid/insect_info.php?380
If so, you may be overwatering. Give the plants and soil surfaces a good spray with insecticidal soap, and try to let the soil dry out between watering if the plants can tolerate it.
view phenanthrene's profile
that sounds about right!! thanks!
view hla21's profile
I just recently bought something called "Poison-Free Ant & Roach Killer" on Amazon because I'd seen it recommended on an animal blog as pet friendly. It's just mint oil (no nasty chemicals at all), and it's the best stuff I've ever used! I live in Florida and, because there are three animals in the house who leave food droppings everywhere, we regularly have a problem with all kinds of ants, from tiny sugar ants to bigger biting ones. We've tried a number of different poisons over the years which always take DAYS to have any kind of effect, plus it means we have to leave serious poison around where the animals might get to it. You just shake this stuff up, spray it on the ants and it kills them within seconds, no exaggeration. It kills every single one of them within seconds! I coat the area where the ants were and they don’t come back for a long time (at least weeks), if at all. It leaves a minty smell which dissipates within minutes and then you can’t even tell it’s been used, and the bottle says it doesn’t stain carpets or hard wood floors. I seriously recommend this for anyone who has an ant or roach problem because it works better than any of the poisons we’ve tried and it’s pet and human friendly!!! It’s my new favorite thing.
view Courtney Lane's profile