Natural Ways To Control Cabbage Worms

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By rpalulis

The cabbage worm

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The Cabbage Destroyer-AKA, Cabbage Worm

Harvesting and enjoying the fruit of one’s labor is such a rewarding and satisfying feeling every gardener growing their own food should experience. We browse through colorful seed catalogues all winter long, strategically planning what to plant, and where to plant it all.  We can’t wait to start eating fresh salad’s every night picked right from the garden.  There’s nothing like taking a nice stroll through the garden, picking a little of this and a little of that, preparing a delicious, healthy and very affordable meal for you and your family to enjoy. 

There is no greater frustration and feeling of defeat when with those expectations arriving to your little oasis of food, to find that someone has already helped them self to a meal.  Many of us will put up fences and scarecrows to guard our precious crops from deer, rabbits, birds, and other animals alike, however there are even much smaller intruders that can do just as much damage, and they are those little critters we call bugs, worms, insects, Garden Destroyers!  Well not all of them are bad; some are actually very handy to have around to get rid of the bad ones.  One particular bad one that is known for destroying many crops of cabbage, kale, and broccoli, is the cabbage worm.

Cabbage Worms are known to attack these plants hard!

· Brussels sprout

· Broccoli

· Collards

· Kale

· Kohlrabi

· Cauliflower

· Turnips

· Radishes

· Mustard Greens

· Rutabaga

Where did the cabbage worm come from?

The cabbage worm came from Europe and is believed to have arrived in Massachusetts about 1869, which then quickly spread throughout the rest of the United States. Members of the cabbage or mustard family are its main targets; however cabbage worms are also known to feed on nasturtium, sweet alyssum and lettuce. The cabbage worm is the larval form of the cabbage white butterfly, which its appearance is white with specs of three to four black spots on each wing. These pretty white butterflies lay little yellow eggs on the underside of leaves. Within a week’s time these eggs hatch little green caterpillars that immediately start munching away on your precious kale, cabbage, broccoli and cauliflower, leaving ragged holes in the leaves. They will continue feeding for 2-3 weeks, and then pupate, having between three to six generations in one season. If you haven’t noticed any damage to your plants, but see these little white butterflies flying around, start taking action! Make sure to check the underside of the leaves. This is where they like to lay those eggs, and even when they become worms they are so hard to see, they blend in so perfectly.

Natural ways to control cabbage worms

You might be asking well how to I get rid of these cabbage worms, in a way that is safe and effective. If you are growing food you most likely do not want to be dumping chemicals on your food to get rid of the bugs right, we want to keep it as organic as possible. Well there are several methods you can do to control cabbage worms safely.

1. Plant tomatoes, onions, garlic and sage, and rosemary near your cabbage, kale, broccoli, cauliflower, and lettuce. These plants are known to deter cabbage worms, plus cabbage worms have other enemies beside you and me, there are plenty of other insects you can attract to the garden that attack these worms such as various spiders, ground beetles, yellow jackets and wasp. The braconid wasp will prey on these worms all day long, and is drawn to strawberries. So perhaps planting some strawberries would be a nice plant to have nearby as well.

2. Incorporate crop rotation of brassica plants will help lower future populations. Also be sure to remove old and dead plants from the garden. The worm will over-winter in the pupa stage attached to host plant debris such as this. Tilling the soil several times between planting will help destroy the eggs and pupa as well.

3. Hand picking them off will slow them down, but if you have infestations of them like I did on my kale last season you will never win.

4. You could cover your plants with light weight nylon so that the butterflies cannot lay their eggs on the plants leaves.

5. There are many sprays available on the market, but you should avoid using many of these insecticides for several reasons one the cabbage worm is known to build resistance to these chemicals and two, do you really want insecticides sprayed on your food? There are some natural and organic applications. I read that sprinkling corn meal, rye flower or a mixture or 1 part salt to 2 part flour on damp leaves will kill the worms. After they eat they will bloat and die.

6. An organic spray that is very popular amongst many growers is BT, (Bacillus thuringiensis). BT is a natural bacterium in the genus Bacillus, and has been used as an insecticide for over 50 years which has been proven to be very safe for the environment and humans.

Remember to check underneath the leaves!

Remember to always check and spray underneath the plants leaves. There were so many occasions when I thought I had all of them removed, until turning a few leaves over. They blend in so well! If you see the white butterfly flying over your crops, take immediate actions, and start inspecting your plants and try to prevent any future infestations.

Chances are if your reading this article you most likely are a gardener, and have experienced a few run-ins with these guys. I am curious to know of some more natural ways to get rid and prevent these worms. I lost nearly my entire crop of kale last year to these cabbage worms and want to avoid that as much as possible this year. Please share with me if you have any experience in dealing with the cabbage worms by leaving a comment below. Thanks, and may we all have a great growing season!

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Comments

Darlene Sabella profile image

Darlene Sabella 15 months ago

Wow, I never even knew about this gross worms, and I love cabbage, I think I will boil a few more minutes. This is such a wise hub, full of fact for great research. Love this hub and I rate you up up love & peace darski

cheapsk8chick profile image

cheapsk8chick 15 months ago

These worms are so disgusting! I had no idea what they were and they infested my broccoli three years ago. I would wash and wash, and still some would be in there when I cooked my broccoli! The only way I found to get rid of them was by spraying the plants with a mixture of water and Murphy's Oil Soap. I still had a few plants that the spray did not help at all, but it did keep the butterflies from laying eggs and the worms from coming over to the other plants. Great hub, I never did know what those things were called! (We called them "those disgusting dang green worms!)

rpalulis profile image

rpalulis Hub Author 15 months ago

Darlene, yeah these worms are gross, nothing like breaking off a piece of broccoli or Kale for a quick snack to notice these green cabbage worms munching away.

Cheapsk8chick, yep disgusting is right! I like what you call them better,"those disgusting dang green worms!) I had forgot about the Murphy's oil soap spray, I did try that as well last year too and it did seem to help a little, but my kale was so infested. This year is going to be an all out WAR! Thanks for sharing

Pamela99 profile image

Pamela99 Level 7 Commenter 15 months ago

Those worms do look gross. I haven't grown any cabbage but anything I try to grow in FL seems to get some time of insect. Our citrus trees are our one true organic crop. Thanks for an interesting hub.

rpalulis profile image

rpalulis Hub Author 15 months ago

Thanks Pamela, yes gardening can have it's many challenges insects being one of them. Hopefully you will never have to encounter these cabbage worms. I sometime wish I had your growing season though would love to have citrus trees growing.

prasetio30 profile image

prasetio30 Level 8 Commenter 15 months ago

Good information, my friend. I know the worm always annoying the plant and made the farmer frustrated. But this is naturally happen to vegetables. Tanks for share this tips. Very useful and informative. I'll show this to my father. He love gardening too. He is planting a mustard and lettuce. Vote up.

Love and peace,

rpalulis profile image

rpalulis Hub Author 15 months ago

Thanks prasetio30 your right things like cabbage worms do naturally feast on vegetables, it just really stinks when they take out your entire crop. Thanks for the vote!

MartieCoetser profile image

MartieCoetser Level 8 Commenter 15 months ago

Yuk, what an ugly, grisly worm! Do you know what is worse than finding a worm in a fruit you are eating? = Finding half a worm.

So it is cabbage worms munching my alyssum?

I kill worms and crickets ‘manually’ after I’ve drawn them out of their hiding places (mostly in the lawn) with soap water. I use liquid soap for dishes or even powder soap for laundry – not too much. When I have a plague I use the draining water of the washing machine... not too much and only once a week. Some plants don’t like this.

I’ve killed (accidentally in ignorance) my Gardenia thunbergia – a South African shrub bearing large, fragrant, white flowers – with (used) coffee grounds. Well, at least now I know I can use coffee as a weed killer. Gardenia wants peat, and used tea bags, so I guess the coffee was poison.

Thanks for this hub. Now I am really in the mood for gardening.

rpalulis profile image

rpalulis Hub Author 15 months ago

Martie! Thanks so much for sharing your tips on eliminating these unwanted guest. And yes finding a half a worm is definitely worse than finding a whole one in your fruit. I would love to see the Gardenia thunbergia in full bloom, sounds like a beautiful shrub.

I too am so ready for the gardening season, I have already started all my seeds and am contemplating whether or not I want to put up another greenhouse this year.

So glad you enjoyed this hub on the cabbage worm, I always look forward to your comments.

Take care Martie hope your having a blessed day!

katiem2 profile image

katiem2 15 months ago

Thank you so much for the helpful and best of all naturals ways to control cabbage worms. I'm getting all set to garden. Appreciate your gardening and natural pest control tips! :) Katie

rpalulis profile image

rpalulis Hub Author 15 months ago

Thanks Katie! I hope that I do not have a cabbage worm problem like I did last year, I literally picked off hundreds of these things off my Kale.

I too cannot wait to garden, I sowed some more seeds today, Rosemary and started the tomatoes already! My parsley, celery, basil, and peppers are already doing very well, so excited can't wait!

Granny's House profile image

Granny's House 15 months ago

I have never got worms, but this will be helpful if I do. Thank you for sharing

rpalulis profile image

rpalulis Hub Author 15 months ago

Granny's House, so glad you have found this hub to be helpful, I hope that you never have to encounter an infestation of cabbage worm.

Darlene Sabella profile image

Darlene Sabella 15 months ago

I had to come back to see this hub on Natural Ways To Control Cabbage Worms, this is so fascinating to me, really great job...rate up love & peace darski

rpalulis profile image

rpalulis Hub Author 15 months ago

Thanks Darlene Hopefully you only see these cabbage worms here on this hub and not on your food- gross!

kipronor profile image

kipronor Level 1 Commenter 7 months ago

This one is amazing hub, if i plant other species of plants around my Cabbage the deter off the worms, Tomato plant particularly have very strong smell.

I will see this and try to practice some of these tricks.

Sally 5 weeks ago

I am particularly wanting to grow brocolli and as many othersm found the leaves almost skeletonised by the green caterpillar and consequently seen the white butterfly hovering around. I put together a concoction of cayeene pepper, normal white or black pepper, garlic I think too and laundry washing powder. There could be other ingredients and I will try to get it again but I've noticed that the white butterfly hovered but didn't land on the brocolli after I'd used it. Of course you need to keep this up front and back of the leaves and after rain too. I'll endeavour to get the proper recipe and post it.

rpalulis profile image

rpalulis Hub Author 4 weeks ago

Thanks Sally keep us posted

I also found that though not the most attractive approach but using netting or very light duty row cover like the agribon that Johnny's Select seed sell works very well keeping the white butterflies off and works great for protected your arugula from those nasty flea beetles.

rbm profile image

rbm 3 weeks ago

Good information, thanks! My husband and I have become big fans of floating row covers as well, and found it keeps the slugs and snails off our new vegetable starts. If it also helps to keep the cabbage white butterfly from laying its eggs, then there's one more reason to use it! :)

sadie423 profile image

sadie423 Level 1 Commenter 2 weeks ago

We've had trouble over the years with these caterpillars, usually I just plant as early as possible and get my main crop of broccoli picked before they really come out to destroy the plants. One year we just gave up on them and just started bring them in to watch their lifecycle instead- my kids loved that. I read once that you can sprinkle cornmeal on the plants in the morning and they ingest it and swell and die. I never tried it...

Denise 4 days ago

I am trying green palmolive dish soap, the worms seem to move faster so you can see them. habe been trying to kill everyone, squish, slat, yuk! Thanks for the hub!

KB 2 days ago

I've found these guys eating my basil like chain-saws through the forest. They are eating basil plants that grew up from seedlings in a pot from last year. The fresh plant in the pot next to them is completely clean. Must have had one of those white butterflies pay a visit at the end of last season

I brought two of them inside to see what they morph into (now I know) and they plow through basil leaves in nothing flat.

rpalulis profile image

rpalulis Hub Author 2 days ago

Sadie423- Sorry to hear of your defeat but at least your kids got a cool science experiment out of it, lol!

Denise- wishing you the very best with the palm olive dish soap, keep on squishing those nasty cabbage worms.

KB- So the cabbage worms got your basil- That just ain't right! I tell ya these bugs have no respect.

My basil usually gets attacked by aphids, but this year I ordered lady bugs, like 4000 lady bugs and released them in my greenhouse, high tunnel and problem spots out in the field. I hope they eat every last one of them.

Thanks everyone for contributing to this hub on cabbage worms by commenting. May you all have a great growing season this year!

Rob

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