--- product_id: 13183077 title: "100520028 13021 Caterpillar Control, 8 oz" brand: "southern ag" price: "£14.94" currency: GBP in_stock: true reviews_count: 10 category: "Southern Ag" url: https://www.desertcart.co.uk/products/13183077-100520028-13021-caterpillar-control-8-oz store_origin: GB region: United Kingdom --- # Organic Bacillus Thuringiensis active Concentrated 8 oz liquid formula Low toxicity, safe for humans & pets 100520028 13021 Caterpillar Control, 8 oz **Brand:** southern ag **Price:** £14.94 **Availability:** ✅ In Stock ## Summary > 🦋 Protect your garden’s glow-up with nature’s own caterpillar nemesis! ## Quick Answers - **What is this?** 100520028 13021 Caterpillar Control, 8 oz by southern ag - **How much does it cost?** £14.94 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/13183077-100520028-13021-caterpillar-control-8-oz) ## Best For - southern ag enthusiasts ## Why This Product - Trusted southern ag brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Eco-Safe Formula:** USDA certified organic with minimal impact on beneficial species - • **Economical Concentrate:** Mix 2-4 teaspoons per gallon for extended use and coverage - • **Precision Pest Control:** Targets caterpillars & worms with proven Bt bio-insecticide - • **User-Friendly Application:** Ideal for electric sprayers, ensuring thorough leaf & soil protection - • **Versatile Garden Guardian:** Effective on vegetables, citrus, nuts, shrubs, trees & ornamentals ## Overview Southern Ag Thuricide HPC Concentrate is an 8 oz organic insecticide featuring Bacillus Thuringiensis, designed to control caterpillars and worms across a wide range of plants. Its low toxicity makes it safe for humans and pets, while its concentrated liquid form allows for efficient, customizable application. Trusted by gardeners for effective, eco-friendly pest management. ## Description Southern AG Thuricide HPC Concentrate 8oz Organic insecticide. Use on: vegetables, citrus, nuts, shrubs, trees, ornamentals and flowering plants. Low toxicity to humans and animals. Controls listed caterpillars and worms. Rate: 2 to 4 teaspoons per gallon. Active Ingredients: Bacillus Thuringiensis In Liquid Form Review: 1 teaspoon per quart of water sprayed between rains controls cabbage worms - This saved my leafy greens! 1 teaspoon per quart of water in an electric sprayer. I grew many varieties of leafy greens this summer, mostly from the cabbage family, and cabbage worms were devastating them until I got this product. Those darn worms are nearly invisible until they've eaten through all your leaves. I had a planter full of watercress that was reduced to nothing but stems, and after picking off the by then large green worms and spraying the remaining leaves and stems as well as soaking the soil with this diluted product, my plant came back healthy and happy. At various times, the worms also attacked my arugula, all the different kinds of mustards I was growing, my nasturtiums... pretty much everything. Given that my plants are up on a second floor balcony, I was kind of surprised by this, but I had to fight these worms off all summer long. I did find that I needed to use this repeatedly, basically every time it rained, and sometimes even during periods of drought. It's definitely not a one-time cure--you have to be vigilant about it. The worms start out so small they are practically invisible, and even when fairly large I have trouble seeing them on casual inspection. I dilute 1 teaspoon of this in a quart of water and put it in an electric sprayer. I find that manual sprayers tire my hands too much for the amount of spraying this requires. First I turn over the leaves and spray their undersides. Then I spray the tops and finally the soil. Whatever is left after treating the plants I use to water the soil. The best thing for pests would be to use netting that doesn't touch the plants so the pretty little "butterflies" can't lay their eggs, but for my container plants that is really impractical. That works more for people growing in the ground in beds or rows. Unfortunately, this seems to have no effect on aphids, which I am now battling. I do have a ton of this left, even after using it all summer on a small porch garden. Review: Absolutely needed for my petunias - I had researched what I needed to keep the bud worms from eating my petunias , and was recommended this, it works great , my flowers look beautiful this year. This BT spray is a very small bottle , but you only 2 ozs per gallon mixed with water , and I spray my flowers using a gallon pump sprayer , so much easier and good coverage , you don’t want to mix up too much at a time because you don’t want it sitting in too much heat, so I pretty much make up what I’m just going to use so I’m guaranteed the effectiveness of it. So the bottle is small but goes along ways , totally worth the price . I spray at night only when there is no sun, I make sure I first the buds and the soil inside my flower pot, without this product , my petunias would have been eaten by those nasty bud worms , this is a great product and I would recommend this to anyone who wants beautiful petunias! ## Features - Southern Ag Thuricide Hpc Concentrate 8Oz Organic Insecticide - Use on: vegetables, citrus, nuts, shrubs, trees, ornamentals and flowering plants - Low Toxicity To Humans And Animals - Item Package Weight: 1.1 Pounds ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004CZ2YBW | | Best Sellers Rank | #15,251 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #92 in Insect & Pest Repellent Spray Concentrates | | Brand | Southern Ag | | Brand Name | Southern Ag | | Customer Reviews | 4.6 out of 5 stars 933 Reviews | | Included Components | Southern AG Thuricide HPC Concentrate 8oz | | Item Form | Liquid | | Item Type Name | Concentrate 8oz | | Item Weight | 0.01 Ounces | | Liquid Volume | 8 Fluid Ounces | | Manufacturer | Southern AG | | Model Number | 100520028 | | Part Number | 100520028 | | Specification Met | USDA | | Target Species | Insects | | UPC | 051538130219 | ## Product Details - **Brand:** Southern Ag - **Item Form:** Liquid - **Item Weight:** 0.01 Ounces - **Liquid Volume:** 8 Fluid Ounces - **Specification Met:** USDA ## Images ![100520028 13021 Caterpillar Control, 8 oz - Image 1](https://m.media-amazon.com/images/I/81uJiJP6rQL.jpg) ![100520028 13021 Caterpillar Control, 8 oz - Image 2](https://m.media-amazon.com/images/I/316sLhTVKkL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: What color is Thuricide? Does it change color over time?** A: Thuricide is a fairly thick hunter green color and mine has never changed color. 'Course, I don't keep it any longer than the current growing season. Once you dilute it to spray, it's only active for up to 12 hours but I've never trusted that time frame so always use it within a couple of hours. Does a terrific job of wiping out the caterpillers! We haven't had a tomato hornworm in the veggie garden for 4 years and there has been no harm to anyone who eats the tomatoes! My flowers no longer look like "lace" from caterpiller damage. I highly recommend it! **Q: How long does one application last?** A: Application will last until rain unless using on herb plants can use till harvest **Q: I know it says, "safe for all plants", but I've used products with the same claim before, w/detrimental effects, on atropa belladonna. Anyone?** A: This is a biologic so I can't imagine it hurting anything but the caterpillars. I would trust the label and follow the directions. On the other hand, fungicides, which BT is not, can be harmful to some plants such as begonias, but as this is a bacteria that is only active for a few days it probably can't harm any plant **Q: How effective is this product on fungus gnats?** A: It worked well. I sprayed twice. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 1 teaspoon per quart of water sprayed between rains controls cabbage worms *by L***E on September 21, 2025* This saved my leafy greens! 1 teaspoon per quart of water in an electric sprayer. I grew many varieties of leafy greens this summer, mostly from the cabbage family, and cabbage worms were devastating them until I got this product. Those darn worms are nearly invisible until they've eaten through all your leaves. I had a planter full of watercress that was reduced to nothing but stems, and after picking off the by then large green worms and spraying the remaining leaves and stems as well as soaking the soil with this diluted product, my plant came back healthy and happy. At various times, the worms also attacked my arugula, all the different kinds of mustards I was growing, my nasturtiums... pretty much everything. Given that my plants are up on a second floor balcony, I was kind of surprised by this, but I had to fight these worms off all summer long. I did find that I needed to use this repeatedly, basically every time it rained, and sometimes even during periods of drought. It's definitely not a one-time cure--you have to be vigilant about it. The worms start out so small they are practically invisible, and even when fairly large I have trouble seeing them on casual inspection. I dilute 1 teaspoon of this in a quart of water and put it in an electric sprayer. I find that manual sprayers tire my hands too much for the amount of spraying this requires. First I turn over the leaves and spray their undersides. Then I spray the tops and finally the soil. Whatever is left after treating the plants I use to water the soil. The best thing for pests would be to use netting that doesn't touch the plants so the pretty little "butterflies" can't lay their eggs, but for my container plants that is really impractical. That works more for people growing in the ground in beds or rows. Unfortunately, this seems to have no effect on aphids, which I am now battling. I do have a ton of this left, even after using it all summer on a small porch garden. ### ⭐⭐⭐⭐⭐ Absolutely needed for my petunias *by M***2 on August 16, 2025* I had researched what I needed to keep the bud worms from eating my petunias , and was recommended this, it works great , my flowers look beautiful this year. This BT spray is a very small bottle , but you only 2 ozs per gallon mixed with water , and I spray my flowers using a gallon pump sprayer , so much easier and good coverage , you don’t want to mix up too much at a time because you don’t want it sitting in too much heat, so I pretty much make up what I’m just going to use so I’m guaranteed the effectiveness of it. So the bottle is small but goes along ways , totally worth the price . I spray at night only when there is no sun, I make sure I first the buds and the soil inside my flower pot, without this product , my petunias would have been eaten by those nasty bud worms , this is a great product and I would recommend this to anyone who wants beautiful petunias! ### ⭐⭐⭐⭐ Works on squash borers *by E***L on December 11, 2025* I suppose it worked, I’m a newbie gardener and found squash borers on my squash plants. I used this and my squash kept on growing and producing and I didn’t see any beetles or larva. The instructions are clear, it’s easy to apply. A little bit goes a long along way, so this tiny jug will last me for a long time! Don’t be underwhelmed by the small size of it, unless you have a massive garden this is plenty for home gardeners. ## Frequently Bought Together - Southern Ag 100520028 13021 Caterpillar Control, 8 oz - Chapin 20000 Made in USA 1 -Gallon Lawn and Garden Pump Pressured Sprayer, for Spraying Plants, Garden Watering, Weeds and Pests, Polypropylene, Translucent White - Bonide Captain Jack's Deadbug Brew, 16 oz Concentrate Outdoor Insecticide and Mite Killer for Organic Gardening --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/13183077-100520028-13021-caterpillar-control-8-oz](https://www.desertcart.co.uk/products/13183077-100520028-13021-caterpillar-control-8-oz) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-21*