Signs, Treatment & Prevention of The Tomato Hornworm

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Have you had an encounter with that pesky Tomato Hornworm?

We did. If we had known the Signs, Treatment & Prevention of the Tomato Hornworm, we could have saved this beautiful plant full of tomatoes.Tomato plant

Those little creatures completely destroyed these beautiful tomato plants!


It’s hard to believe that a creature so small can do so much damage but they can. Hornworms can destroy a plant this size in a matter of days, if left untreated. We handpicked them from the plant on a daily basis but they still destroyed it.

Topsy Turvy Planter!

It was our first time using a Topsy Turvy planter for growing tomatoes and it was going exceptionally well as you can see in the photo until that hornworm, horned in on our fun. (sorry, I just had to say it.)

Because of our experience, I wanted to share with you what we have since learned so you can take preventative measures too.

We are not horticulturalist! We are simply homemakers who enjoy growing a few back yard tomatoes for our own eating pleasure.

Tips for Tomato Hornworm. Signs, Treatment & Prevention

Signs of the Tomato Hornworm

  • Dark droppings on the tops of the plant leaves and on the ground around your plants (Ewww, it’s their poo)
  • Missing stems
  • Wilted leaves

He is almost cute, isn’t he? If you are raising chickens, you may already know that  you can feed these to the chickens. It’s like a steak dinner to them!

Tomato Hornworm Signs, Treatment and Prevention. How to rid your tomato plants of the green tomato worm pest #tomatoplants #organicrepellent

Treatment/How to Get Rid of the Hornworm

  • Handpicking; a slow a tedious process. Drop them into soapy water to kill them or feed them to the chickens.
  • Insecticides; BT or Bacillus thuringiensis, sold commercially as Dipel or Thuricide (this is an organic insecticide available on Amazon here)
  • Nematodes such as lady bugs and braconid wasps.  Attract the wasps by growing the companion plants listed below under Prevention. 


  • Till the soil between planting seasons
  • Companion plantings such as planting Basil and Marigold near your tomatoes will help. The strong odors from both of these plants are believed to ward off the hornworm. Other companion plants include Borage (also known as Starflower) and Zinnia. 


Garden Wasp Sign

If you see a Hornworm covered in these little white sacs, leave it alone to die. Those are eggs laid by the parasitic braconid wasp. The worm will die and the eggs will hatch more of the helpful garden wasps. 

Yes, I did just say you can allow a bunch of wasps to hatch and live in your garden! I’m not too crazy about that idea either but if it will save my tomato plants, count me in. Some of the companion plantings mentioned above include flowers which attract the wasps to your garden.

Tomato hornworm covered in eggs from braconid wasp


Tomatoes are the most commonly planted home garden plant. It is so nice to bring in a nice big juicy ripe tomato in the summer and make yourself a tomato sandwich, isn’t it? Don’t let those pesky Hornworms ruin your summer garden!

How to get rid of tomato hornworm from your backyard garden. Organic treaatment and prevention of the tomato hornworm. #backyardgarden #organicgarden

This short video on You Tube does a great job of educating about the Tomato Hornworm. 


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  1. I have never had a tomato horned worm. (I’m knocking on wood!) This is great information to know, so thanks. Thanks for linking up at the Weekend Blog Hop at My Flagstaff Home!


  2. I saw one of these worms for the first time last year. It totally freaked me out:-) Great article. Pinned and stumbled! Thanks for linking up and sharing with us at Funtastic Friday. Hope you join us again this week.

  3. I remember seeing these pesky things in my dad’s garden when I was growing up! So glad you shared how to get rid of those worms. The video is very informative, too, showing when to look for worms and what to look for.

  4. Our tomato plants got attacked too and then was finished off by the freak snow here. This year I got some organic pesticide to spray on the plants and hopefully it will help. I’ll post some instagram pics of our tomato plants soon. Thanks for sharing your tips.

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