Safer® Brand 16oz Caterpillar Killer II Concentrate OMRI Listed® for Organic Use

Special Price $14.79 Regular Price $17.49
Safer® Brand 16oz Caterpillar Killer II Concentrate OMRI Listed® for Organic Use 7 5 5 1
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  • Kills caterpillars, gypsy moth larvae, worms and cabbage loppers
  • Effective method of eliminating the garden or field of the tomato hornworm without environmental concerns or harm to beneficial insects
  • Can be used up until day of harvest
  • OMRI listed®
  • Contains bacillus thuringiensis var Kurstaki-98.35%

Safer® Brand Caterpillar Killer II Concentrate With B.T. - How It Works

Safer® Brand Caterpillar Killer Concentrate uses a naturally occurring bacterium to kill and control caterpillars and other leaf-eating worms. The caterpillars and worms that are damaging your plants will stop feeding immediately after ingesting the bacterium, which is known scientifically as Bacillus Thuringiensis var. Kurstaki (B.t. for short). Plus, when Caterpillar Killer is used as directed, it has no effect on birds, earthworms, or beneficial insects such as honeybees and ladybugs.

This economical concentrate is easy to mix into a ready-to-use solution. And, because Caterpillar Killer is OMRI Listed® and compliant for use in organic gardening, you know that you’re controlling leaf-chomping caterpillars in a way that fits into your organic garden plan.

Best Used For

Organic Gardening
Organic Gardening
Killing Caterpillars and Worms
Killing Caterpillars & Worms
Stops feeding damage
Stops Feeding Damage
Spares Beneficial insects
Spares Beneficial Insects
Economical Concentrate
Economical Concentrate
Caterpillar Concentrate Closeup

Say Goodbye to Caterpillars & Leaf-Eating Worms

Fruits, vegetables, shade trees and ornamentals are all susceptible to the damage from worms and caterpillars. These nuisance pests will eat their way through foliage and cause irreparable damage to plants extremely quickly. That’s why it’s important to stop these caterpillars and worms right away with Safer® Brand Caterpillar Killer!

Target These Pests

Use Safer® Brand Caterpillar Killer Concentrate to target these problem insects:

  • Tent Caterpillars
  • Gypsy Moth Caterpillars
  • Tomato Hornworm
  • Cabbage Looper
  • Imported cabbage Worm
  • Bagworm
  • Spring Cankerworm
  • Fall Cankerworm
  • Elm Spanworm
  • Fall Webworm
tobacco hornworm
tomato with wormhole

Identify Damage

Eliminate a variety of caterpillar & worm species. Visible damage from each will be different. Tomato hornworms eat entire leaves, stems, and the fruit of the plant, causing it to look like someone took a bite. Other worms, like tent caterpillars & fall webworms, form webs on trees & shrubs resembling white bags made of spiderwebs. Below these “tents” are dozens of caterpillars eating the leaves.

tent caterpillars
Caterpillars on Cabbage

B.T. To the Rescue

Bacillus thuringiensis var. kurstaki is a naturally occurring bacterium that kills certain leaf-eating worms and caterpillars. Simply spray Caterpillar Killer onto trees, shrubs and vegetables so that worms and caterpillars eat the treated vegetation.

The bacterium includes a toxin that stops them from feeding or causing more damage to your plants. Within a few days, effected caterpillars and worms will die of malnutrition. Safer® Brand Caterpillar Killer can be used until the day of harvest, so you can protect your plants through their entire growth cycle.

Won't Harm Beneficial Insects When Used as Directed

Safer® Brand Caterpillar Killer controls and eliminates a variety of destructive caterpillars and worms. When used as directed, this treatment won’t harm birds, earthworms and beneficial insects, such as honeybees and ladybugs. These beneficial organisms are important to our ecosystem, and their survival is vital to the continued production of nutrient rich soil and the natural pollination process of flowers, fruits and vegetables.

won't harm beneficial insects
How to Use

How to Use Caterpillar Killer

Mix caterpillar killer as directed to achieve desired amount of solution. Once Caterpillar Killer is sprayed onto plants and the treated vegetation is ingested by caterpillars and worms, feeding and damage will stop immediately. Keep in mind that more caterpillar eggs may hatch, so it’s best to monitor the area for newly hatched pests even after treatment. If more caterpillars are noticed, you may need to repeat the treatment again after 5-7 days. It’s recommended to apply Caterpillar Killer late in the afternoon or on cloudy days as B.t. can breakdown in excessive sunlight.

An Economical, Easy-to-Mix Solution

This 16 oz bottle contains a concentrated solution that creates over 250 times that amount in usable caterpillar-killing solution. Simply mix a small amount of concentrate with water as directed until you reach the desired amount of solution. Store any unmixed concentrate in a cool place for later use. One 16 oz bottle of concentrate makes up to 32 gallons of solution and protects over 10,000 square feet of plantings.

Economical Concentrate
OMRI Listed

Compliant for Use in Organic Gardening

Safer® Brand Caterpillar Killer Concentrate has been third-party reviewed for use in organic gardening by Organic Materials Review Institute. It carries the OMRI Listed® seal, and it has been deemed compliant for use in organic gardening by the USDA’s National Organic Program. With Safer® Brand, you have an economical solution to get rid of caterpillar and worm pests in your garden while staying true to the organic gardening regimen that you, your family and your plants love.

Five Stars

"I have tried several products to kill hornworms on my Royal Princess tree. This product stops hornworms caterpillars in their tracks. I have been losing plants for two years now until I found Safer®. It does not leave any noticeable residue on leaves like other products. A great product. Thank you!” (Review from Anonymous)

Safer® Brand Caterpillar Killer Product Details

Do you want to know more helpful details about Caterpillar Killer? Take a closer look at the in-depth specifications for this product.

Safer® Brand Caterpillar Killer Product Details
Model # 5163-6
Size 16 fl oz
Makes Up to 32 Gallons of solution
Active Ingredients B.t. - bacillus thuringiensis var Kurstaki 98.35%
Eliminates Caterpillars and worms
For Use On Trees, shrubs and vegetables
Safer® Brand Caterpillar Killer Concentrate
Model # 5163-6
Size 16 fl oz
Makes Up to 16 gallons of solution
Active Ingredients B.t. - bacillus thuringiensis var Kurstaki 98.35%
  • Bagworms
  • Cabbage Looper
  • Elm Spanworms
  • Fall Cankerworms
  • Fall Webworms
  • Gypsy Moth Caterpillars
  • Imported Cabbage Worms
  • Spring Cankerworms
  • Tent Caterpillars
  • Tomato Hornworms
For Use On
  • Broccoli
  • Cabbage
  • Cauliflower
  • Celery
  • Collards
  • Kale
  • Lettuce
  • Melons
  • Mustard Greens
  • Ornamentals
  • Shade Trees
  • Tomatoes
  • Turnip Greens
Usage Notes
  • OMRI Listed® and compliant for organic production.
  • Apply at first sign of infestation.
  • Apply up to the day of harvest.
  • Spray leaf surfaces thoroughly & on top and bottom of leaves.
  • Follow individual application instructions.
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Best stuff ever
May 3, 2021
Love this stuff. Safe yet protects my Burr Oakes, Pecan, Mountain Laurel, Thyme, Rosemary and anything else that bag worms infest. Works really quickly and stops them in their tracks.
Was this review helpful? 0
Aug 21, 2020
Worked great on the bagworms on my arborvitaes. Fast shipping. Would definitely order from safer brand again.
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This stuff works!
May 24, 2020
I love the safer products line of OMRI listed pest controls. The Bt with kurtsaki is effective when fighting the cabbage looper battle. Thanks for the free shipping!
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Safer products always good organic treatment
May 7, 2020
I have not had to use the product yet, but based on my experience with other Safer products I feel comfortable in stating that it will perform as stated.
Was this review helpful? 2
does the job
May 18, 2018
since I have been using Safer caterpillar killer I have had no problem with caterpillars eating my plants
Was this review helpful? 0
Great product
Sep 26, 2017
Had tried everything to get rid of the oleander caterpillars prior to using your caterpillar killer.....safer truly works!!!!!
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best catipiller killer on the market
Aug 1, 2017
When ever I have a catipiller problem I always use safer brand to get rid of the problem. It works perfect ever time
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what is the shelf life for Safer Caterpillar killer? is a date listed on the label?
Question by: D J Bilesky on May 8, 2023, 8:35 PM
This product will be effective for one year once opened or two years unopened. Please contact us directly for assistance in determining the date of manufacture.
Answer by: Susan (Admin) on May 9, 2023, 11:49 AM

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