Schaefer
Safer Caterpillar Killer Concentrate With B.t.
Best organic solution for eco-conscious gardeners managing destructive caterpillar infestations.
Protect your garden with Safer® Brand Caterpillar Killer II, an organic concentrate powered by B.t. (Bacillus thuringiensis var. Kurstaki). This potent formula effectively targets and eliminates destructive caterpillar and worm pests like hornworms and armyworms. Once they consume treated foliage, they stop feeding, preventing further plant damage. Importantly, it's designed to be safe for beneficial insects such as honeybees and earthworms when used as directed, making it a responsible choice for eco-conscious gardeners seeking to preserve their plants without harming desirable wildlife. This 16 oz concentrate offers economical and targeted pest management.
$14.99
Owner Satisfaction
4.6
/ 5
Category Rank
357
/ 1717
#357 in Pesticides
Price vs Category Average
-66%
Below average
Container Size
16
/ oz
Who it's for
- Gardeners needing immediate relief from foliage-destroying pests
- Organic gardeners growing edible fruits and vegetables
- Eco-conscious gardeners protecting pollinators and beneficial insects
Who should skip it
- Busy growers unable to monitor plant development closely
- Gardeners seeking a low-maintenance, set-it-and-forget-it solution
- Gardeners dealing with diverse infestations like aphids or beetles
Performance breakdown
Target Specificity
Biological formula effectively isolates larvae without harming essential garden pollinators.
Application Versatility
Concentrate format allows for flexible dilution across various lawn and garden needs.
Feeding Cessation Speed
Rapidly halts pest consumption to prevent further damage to foliage.
Organic Compliance
Bacillus thuringiensis base provides a reliable, eco-friendly pest management solution.
Cost Efficiency
Highly concentrated liquid offers significant value compared to pre-mixed alternatives.
Ease of Storage
Compact bottle design fits easily into any standard garden shed shelf.
Key Specs
Container Size
16 oz
Active Ingredient
Bacillus thuringiensis var. Kurstaki
Physical State
Liquid
Product Form
Concentrate
Weight
1.02 lbs
Dimensions
2.2 × 4.03 × 6.18 in
Barcode
024654516304
Pesticide Type
Biological/Organic
Features
- Organic solution for caterpillar and worm control
- Kills pests upon ingestion of treated foliage
- Safe for beneficial insects and pollinators
- Fast-acting on target pests
- Concentrate formulation for economical use
- Targets a wide spectrum of common garden pests
- Protects plants from chewing damage
- Ideal for lawn and garden applications
What customers say
Customers praise this product for its exceptional reliability and effectiveness against caterpillars. Gardeners trust its targeted pest elimination, noting its safety for beneficial insects and the environment, which aligns with organic gardening. The concentrate is easy to mix and apply, offering significant value. It is a highly recommended solution for efficiently protecting vulnerable plants from destructive pests.
Know before you buy
The active ingredient, Bacillus thuringiensis (B.t.), is a naturally occurring bacterium that only affects the digestive systems of specific leaf-eating caterpillars. Because it requires ingestion to activate, beneficial insects like honeybees and earthworms are not harmed when the product is used as directed.
No, you do not need to hit the insects directly. The product is most effective when applied to the foliage that the caterpillars are actively eating, as they must ingest the treated plant material to be affected.
Once the caterpillars consume the treated foliage, they stop feeding almost immediately. While they may remain on the plant for a short period, they will cease causing damage and die within a few days.
Yes, this organic formula is suitable for use on vegetables, fruits, and ornamentals. Always check the label for specific pre-harvest intervals to ensure you are following safety guidelines before consuming your produce.
Since this is a concentrate, you will need to dilute it with water according to the instructions on the product label. Using a standard garden sprayer is the most effective way to ensure even coverage on your plants.
Application frequency depends on the severity of the infestation and environmental conditions. It is best to reapply as needed, especially after heavy rainfall, to maintain a protective coating on the leaves.
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$15