---
product_id: 7426916
title: "Monterey B.t. - Biological Insecticide for Organic Gardening - 1 Pint Concentrate - Apply Using a Sprayer Following Mix Instructions"
brand: "monterey"
price: "฿645"
currency: THB
in_stock: false
reviews_count: 8
url: https://www.desertcart.co.th/products/7426916-monterey-b-t-biological-insecticide-for-organic-gardening-1-pint
store_origin: TH
region: Thailand
---

# OMRI Listed Easy mix & apply Targets caterpillars Monterey B.t. - Biological Insecticide for Organic Gardening - 1 Pint Concentrate - Apply Using a Sprayer Following Mix Instructions

**Brand:** monterey
**Price:** ฿645
**Availability:** ❌ Out of Stock

## Summary

> 🌿 Protect Your Garden, Sustainably!

## Quick Answers

- **What is this?** Monterey B.t. - Biological Insecticide for Organic Gardening - 1 Pint Concentrate - Apply Using a Sprayer Following Mix Instructions by monterey
- **How much does it cost?** ฿645 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/7426916-monterey-b-t-biological-insecticide-for-organic-gardening-1-pint)

## Best For

- monterey enthusiasts

## Why This Product

- Trusted monterey brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rapid Results:** Insects stop feeding immediately after treatment, protecting your garden swiftly.
- • **Organic Assurance:** Certified for organic gardening, ensuring eco-friendly practices.
- • **User-Friendly Formula:** Easily mixes with water for hassle-free application using common sprayers.
- • **Versatile Application:** Compatible with a wide range of plants, from vegetables to ornamentals.
- • **Targeted Insect Control:** Effectively eliminates harmful caterpillars and worms without harming beneficial insects.

## Overview

Monterey B.t. is a 1-pint concentrate biological insecticide designed for organic gardening. It effectively targets caterpillars and worm-type insects while being safe for beneficial species. OMRI Listed, it ensures compliance with organic standards and is easy to apply, providing quick action to safeguard your plants.

## Description

Full description not available

## Features

- INSECT KILLER - Designed for use on caterpillars and worm type insects, such as cabbage looper, bagworm, gypsy moth, fall cankerworm, elm spanworm, and more. Has no effect on birds, earthworms, or beneficial insects such as honeybees or ladybugs.
- FOLIAGE PROTECTOR - Designed for use on a variety of plants, including broccoli, celery, cabbage, turnip greens, mustard greens, cauliflower, melons, lettuce, tomatoes, shade trees, ornamentals, and many more.
- FOR ORGANIC GARDENING - OMRI Listed for Organic Gardening. Organic Material Review Institute reviews products to ensure a product complies with all organic standards under the USDA’s National Organic Program (NOP).
- EASY TO APPLY - Product instantly mixes with water and should be applied using either a trigger spray bottle or pressure tank sprayer. Carefully read and use according to label directions.
- QUICK ACTION - Insects eat treated foliage, then immediately stop feeding and damaging plants.

## Product Details

- **Item Form:** Spray
- **Item Weight:** 16 Ounces
- **Liquid Volume:** 16 Fluid Ounces
- **Active Ingredients:** Bacillus thuringiensis
- **Brand:** Monterey

## Images

![Monterey B.t. - Biological Insecticide for Organic Gardening - 1 Pint Concentrate - Apply Using a Sprayer Following Mix Instructions - Image 1](https://m.media-amazon.com/images/I/71x1QiER1EL.jpg)
![Monterey B.t. - Biological Insecticide for Organic Gardening - 1 Pint Concentrate - Apply Using a Sprayer Following Mix Instructions - Image 2](https://m.media-amazon.com/images/I/81pURt7B9KL.jpg)
![Monterey B.t. - Biological Insecticide for Organic Gardening - 1 Pint Concentrate - Apply Using a Sprayer Following Mix Instructions - Image 3](https://m.media-amazon.com/images/I/71M-uJ1HTEL.jpg)
![Monterey B.t. - Biological Insecticide for Organic Gardening - 1 Pint Concentrate - Apply Using a Sprayer Following Mix Instructions - Image 4](https://m.media-amazon.com/images/I/71isx6-NBKL.jpg)
![Monterey B.t. - Biological Insecticide for Organic Gardening - 1 Pint Concentrate - Apply Using a Sprayer Following Mix Instructions - Image 5](https://m.media-amazon.com/images/I/71Sh7VmGc9L.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: What is the shelf life of the undiluted product in the original container?**
A: My experience is that by the next year it is not very effective.  I would say shelf life is probably the season in which you purchase it.

**Q: How is this mixed and administered? Thanks.**
A: Most of the answers here are WRONG. According to the instructions on the label, mix 4 TEASPOONS BT with 1 GALLON WATER. That would be 1 1/3 TABLESPOONS BT (or 1 TABLESPOON plus 1 TEASPOON BT, since 1 tablespoon = 3 teaspoons). ALWAYS read instructions for products! Official product instructions go through multiple checks before being printed or published. No one proofreads these answers. Some of the responders here may be confusing tablespoons, teaspoons, and fluid ounces. (1 fluid ounce = 2 Tablespoons)  BT is considered safe, but it won't be effective at the wrong concentration. Other products might be very dangerous if mixed incorrectly.

**Q: Can this be injected into vine stems to kill the squash vine borer?**
A: Yes. At the very first signs of hole (usually evident by sawdust like droppings around the entry hole, inject BT above and below the openings to eliminate the borers.

**Q: can you apply with a end of hose sprayer? what dilution rate?**
A: There is a guide on the bottle for concentration. I believe it is about 1 ounce per gallon. Technically, you can use end of hose sprayer. I am always concerned about how far it will spray and how quickly 16 gallons of water will pass through. Our trees are very tall, so, I make a solution in a large container and use a power washer to get the extra height. Product works well. Caterpillars start dropping in minutes. This year, though, I tried sprinkling pesticide and letting it soak into roots of trees. It takes longer to work, but has been effective so far.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Work on "Sod Webworms" in Florida for me!
*by G***T on June 5, 2025*

Having to battle "Sod weebworms" every summer, eating at my St.Augustine lawn with many other products I decided to take a chance that this would Help. Did I say HELP? Absolutely Did!! The active ingredient is Bacillus thuringiensis, a bacterium found naturally in soils. This bacterium paralyzes the target pest’s digestive system, causing them to stop feeding within a few hours of eating the product, where they will die within hours.The trick is a follow-up application 3-4 months later to help break the reproduction cycle.Now I (Spray) twice a year, and haven't seen evidence of the small white moth that hatches out and is the only tell-tail sign, and by then it generally too late, and the devastation to the root system has all ready taken place.

### ⭐⭐⭐⭐⭐ good quality, reasonable price
*by A***P on June 6, 2025*

Does what it should do. Easy to mix. Here's a tip: don't bother with little sprayers, just buy a 1-2 gallon sprayer or larger so you don't have to keep stopping to mix up another batch.

### ⭐⭐⭐⭐⭐ Protected my Japanese maples!
*by H***G on May 27, 2025*

Works great to prevent bagworms! Spray them in the spring before they start spinning cocoons. May take some trial and error to get it right, or try doing it once a week after your tree has stopped flowering, to make sure you don't hurt any pollinators. Worked great to protect my Japanese maples

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-01-23*