Monterey B.t. Biological Insecticide
Best organic solution for gardeners managing caterpillar pests on edible crops.
Monterey B.t. Biological Insecticide provides effective, targeted control against caterpillar pests. Utilizing a natural biological agent, it halts feeding immediately upon ingestion, preventing further plant damage. This OMRI Listed insecticide is safe for beneficial insects, bees, birds, and earthworms when used as directed. It's approved for application on fruits, vegetables, ornamentals, and shade trees, with a pre-harvest interval allowing application up to the day of harvest on edible crops. This formulation ensures organic gardening practices are supported while maintaining plant health.
$22.95
Owner Satisfaction
4.6
/ 5
Category Rank
358
/ 1771
#358 in Pesticides
Price vs Category Average
-48%
Below average
Pesticide Type
Biological Insecticide
/ Biological Insecticide
Who it's for
- Gardeners protecting pollinators and beneficial insects
- Organic growers avoiding synthetic chemical treatments
- Home vegetable gardeners harvesting crops frequently
Who should skip it
- Gardeners seeking low-maintenance, long-lasting pest protection
- Gardeners managing diverse infestations like aphids or mites
- Busy growers unable to monitor larval feeding cycles
Performance breakdown
Organic Compliance
OMRI listing ensures full compatibility with strict organic gardening standards.
Targeted Efficacy
Biological action halts caterpillar feeding immediately upon ingestion for rapid protection.
Pollinator Safety
Formulated to protect honeybees and beneficial insects during garden application.
Harvest Flexibility
Zero-day pre-harvest interval allows for application right up to picking.
Application Versatility
Effective across a wide range of fruits, vegetables, and ornamental trees.
Ease of Application
Requires a separate sprayer, adding a step to the treatment process.
Key Specs
Pesticide Type
Biological Insecticide
Product Form
Liquid Spray
Container Size
1 Pint / 473.16 mL
Net Volume
16.0032 fl oz
Active Ingredient
Spinosad
Target Pests
Caterpillars
Target Life Stage
Larvae
Application Method
Requires Sprayer
Features
- Kills caterpillar-type insects effectively
- Safe for beneficial insects and bees
- Stops pest feeding immediately
- Approved for use on edible plants
- OMRI Listed for organic gardening
- Use on fruits, vegetables, and trees
- Biological control agent
- Safe for birds and earthworms
What customers say
Gardeners overwhelmingly value Monterey B.t. Biological Insecticide for its targeted, organic pest control. Users consistently report excellent efficacy against destructive caterpillars, often seeing results quickly. The core satisfaction driver is its biological safety; it specifically targets larvae while leaving beneficial insects like bees and ladybugs completely unharmed. This nonnegotiable safety profile ensures crop protection without compromising the garden ecosystem or leaving unwanted residues. While proper application timing is crucial for success, most customers agree the product's reliability and environmental consciousness justify the investment. It is trusted for delivering dependable, sustainable results season after season.
Know before you buy
This product is specifically designed to control caterpillar-type insects in their larval stage. It is not intended for use against beetles, aphids, or other non-caterpillar pests.
Yes, it is approved for use on fruits and vegetables. Because it is OMRI Listed, it is suitable for organic gardening practices.
There is no waiting period required. You can apply this insecticide up to the day of harvest.
When used according to the label directions, this biological insecticide is safe for beneficial insects, earthworms, birds, and honeybees.
The active ingredient acts as a biological control agent that stops the caterpillar from feeding immediately upon ingestion, which prevents further damage to your plants.
Yes, this product comes as a liquid concentrate and requires a garden sprayer for proper application to your plants.
Still have a question?
Ask Hayley anything about this product before you decide.