Make an all purpose organic pesticide from vegetables

Picture of Make an all purpose organic pesticide from vegetables
This instructable will show how I made a cheap, all-purpose organic pesticide for my herb & vegetable garden. It can be used on a variety of insects that live in the dirt or on the plants including worms, mites and other parasites.

This entire pesticide will eventually break down and be reduced to nothing, so it is OK to eat any herbs or vegetables that are growing. This is mainly intended for indoor use, but I see no reason why it wouldn't work outdoors as well.
Remove these adsRemove these ads by Signing Up

Step 1: Materials

Picture of Materials
The materials used to make the pesticide should be easy to obtain.

You will need:

  • an empty & clean gallon jug (such as a milk jug)
  • a spray bottle with spray nozzle
  • a funnel
  • a piece of cloth such as a shirt or bandanna
  • a pot that can hold 1 gallon
  • 2 small onions
  • a jalapeño pepper
  • a clove of garlic
  • some dish soap

Take 1 gallon of warm water, dump it in a pot and you're ready to begin making the pesticide.

Step 2: Killer Salad

Picture of Killer Salad
Take the vegetables and begin cutting them up. It doesn't have to be pretty, since nobody's going to eat it!

Chop up the 2 onions, the garlic and half or 3/4 of the jalapeño pepper. The seeds can be left in, since they're hot too.

Blend all the veggies together until pasty in a blender. The killer salad is now a killer paste.

***Take care not to rub your eyes or face after handling the liquid or the vegetables. The pepper especially can really burn if it gets in the eye!***

Step 3: Making the killer soup

Picture of Making the killer soup
After everything has been blended, dump the paste into the pot of warm water and let it sit for 20 minutes.

The ground up vegetables and water will make the killer soup or tea. It's going to be mighty fragrant at this point. Just let all those offensive tastes and odors seep out into the water.

1-40 of 108Next »
I made this for my my sunflowers daisies and tomatoesI forgot to set off the stove and it almost killed my cat Lol...... I also added cayenne pepper to give it a kick
videoman223 years ago
Will this work to kill beetles? I grow pumpkins and tomatoes along with variouse other veggies,herbs,vining plants, tropical plants, succulents and cacti. Just curiouse if i could use it on everything.
Technically, this counts as a repellent rather than a pesticide-alluims (garlic/onions) and peppers won't actually kill much of anything but will certainly chase them away and not come back (the soap can kill some types of tiny insects but not very effectively). You might want to look into using pyretheum (my spelling might be off) aka "painted daisy" flowers in the mix which will kill insects yet break down within hours but you have to make sure to use it only in the evening when the good bugs such as bees are asleep or you'll kill them too. The amounts to be used vary and I don't remember them off the top of my plants haven't blossomed this year for some reason and it's my first year trying to grow them myself so I haven't made any from scratch yet. It's an insect neurotoxin and can be poisonous to humans when fresh or in solution but once sprayed on plants in the evening it breaks down so fast that by morning the veggies/fruit are usually considered safe to eat.

Would marigolds work?

daviddunbar16 months ago

thank you for the info. Great solution! Love it is natural.

MikeBav8 months ago

Awesome tip! Thanks for sharing will bookmark this page for future reference Best,, Phoenix Pest Control

henryjon8 months ago

Great blog
post! I don’t understand how long it will require me to obtain through all of
henryjon8 months ago

Great blog
post! I don’t understand how long it will require me to obtain through all of

mikedd5521 year ago

I have 9 Raised Veggie beds filled ith all kinds of veggies and I have tried it all with Garlic,Onions,Dish Soap Vegatable Oil etc and I have found nothing works great and fast so Im going to be going with Neem Oil can someone tell me how often I can use the Neem Oil and the product Im getting tomorrow is concentrate has anyone here used Neem Oil and does it work good???Please help me cause this is my very first time gardening???


D. In Florida

dojuwife1 year ago

Hey , Eric check this 1 out.

Ccolet1 year ago
So I didn't do any research before saying this. ( I'm just going from my biology lessons) The whole sticking idea of the soap isn't quite right. If I'm correct the soap is breaking down the insects cuticle to allow the actual pesticide in. It might make it stick too but first you need to get under the cuticle.
CosmicGM2 years ago
(removed by author or community request)
Do you mean fungus gnats? At any rate, oil won't help the root zone (will work for adult gnats but not in the soil) and the amount of soap required to get rid of them in the soil would damage the plant from salt if nothing else. Predatory nematodes mixed into the watering can regularly works well against the larvae, you don't need much but if you let the soil dry out completely between waterings you'll need to reapply. There are other predators that target the adult stages too.
nugardnr1 year ago
how often do you have to spray the plants? I have an outside garden.
Beware if you go too hot with the peppers because some can actually burn the leaves of the plants. For CosmicGM do a search for Neem Oil. I always have to order it on the internet because no one carries it around where I live.
armetisius2 years ago
It is only a small amount of soap in the total solution anyway; however, for those concerned about it here is a viable solution. Since the soap really only acts as a sticking agent in this formulation why not substitute fish oil for use outside. The odor would be strong so not for indoor use but a standard fish oil from the farm dept. would not only achieve the sticking quality but also provide nutrients to the plants as it breaks down.
jeff-o5 years ago
Can you use something hotter than jalapeno? They're pretty mild IMO. ;)
iPodGuy (author)  jeff-o5 years ago
I'd bet that you could go as hot as you could get. I ate a tiny little pepper off some unknown pepper bush and it was easily the hottest I ever had. No rabbit on earth would like that.
Usually the smaller it is, the hotter it is. The problem here is that smaller chillis would have a smaller proportion per litre in the mix. Might be better to go with increased quantity of the standard chillis than to go with the same number of chillis, but hotter (unless you can find some ultra hot ones that are the same size as regular ones)
The strongest, as far as I know, is the Habanero or Scotch Bonnet.  It's orange, and about two inches across when ripe.  I have seen it in the local supermarket.
The Trinidad Moruga Scorpion is the current hottest in the world. The #2 is the Bhut Jolokia. These are dangerous peppers.
tztmama2 years ago
My garden is not that big. Could I freeze half of the spray and use it later? I just dont think I will use it all within two weeks.....
Why is everyone freaking out about the soap? They still make 99 1/4% pure Ivory soap. A few drops of that will suffice.
Ijsbeer3 years ago
Does it smell particularly strongly? My bedroom is full of plants, and I've just found aphids on one (quite surprising how long it took, this is the first time I've found them in here after years of having the room full of plants), and obviously I want to prevent a mass aphid takeover - though for obvious reasons, I don't want my bedroom smelling like any of the ingredients.

And how is there all this mention of replacing the original soap, but no-one's suggested making it themselves? ;) I'm pretty sure there are multiple instructables on the subject.

Anyway, thanks for posting this.
losregni3 years ago
I believe the soap may be used as a "sticker" which helps the mix stick to the leaves longer. We use sticker on the farm when we are spraying pastures.

cjb844 years ago
im not sure you should be calling this "organic". Last i checked there are some pretty nasty chemicals in dish soap that arent organic. Otherwise it sounds like a great idea. i will try it without the soap.
same here --w/o soap first
Try castile soap such as Dr Bronner's. It's pure vegetable oil and sodium hydroxide (plus water for the liquid version). True soap is some sort of oil/fat mixed with sodium hydroxide/lye and allowed to react. I love using it and the lavender version with the essential oil works as a mild natural antibiotic that should be safe even for gray water systems. It's highly concentrated and a small bottle lasted me more than a year even with my husband doing dishes.
There are organic dish soaps like the brand Method. It's honestly better than other soaps
actually seventh generation is dish soap made with all organic ingredients. Its supposed to be eco friendly. we use it our house hold because of the septic tank
alee523 years ago
The dill in my garden went wild, grew about two foot tall. I let it go to seed so it would re- seed the herb patch and notice it is covered in lady beetles, yellow ones! Hope they gobble the aphids big time. Will let u know if the organic spray saves my cauliflowers which are being decimated by cabbage moths.
actually they say having lady bugs in your garden -- food or flower -- is actually good for them like having earth worms in your soil is good for your plants growing in said soil
jjone538 alee523 years ago
Garden Moths Are Pretty Annoying
very cool we will have to try it. do you think it would work on regular flowers and 'green' plants?
jwitkowski13 years ago
I would like to suggest an alternative to dish soap. The Shaklee Corporation makes a product called basic H. Farmers have been using it for decades in their soil. It makes the soil more absorbent. As a pesticide it actually kills them by penetrating their bodies and drowning them. I use it to clean my vegetables. It is an awesome product. You can order it from Shaklee at
jakoby3 years ago
I'd be careful when spraying something containing dish soap on your plants. Dish soap can remove the waxy plant cuticle that covers leaves and the like, making plants more vulnerable to viruses, fungi, and other nasties that you don't want. In fact, that's the main idea behind the organic herbicides that use vinegar; the soap removes the cuticle allowing for better absorption of the vinegar, which kills the plant.
TimmyMiller3 years ago
is it safe to use on grapes?
iPodGuy (author)  TimmyMiller3 years ago
Should be ok
You might want to rinse the grapes before eating, especially if you spray them shortly before harvest....I learned the hard way that the tiniest residue of hot pepper can be painful....but I'm also very sensitive to capcasin (spelling?) and can't even allow hot peppers in the house, sweet peppers are hot enough for me to deal with.
solive3 years ago
Besides as a pest repellent, essential oils play important role as a attractant for several pests. You can find the complete article here at Indonesia Essential Oils:
1-40 of 108Next »