--- product_id: 109305518 title: "Alligare Diquat Aquatic Herbicide to Control Bluegrass, Duckweed, Hydrilla & More - Glyphosate Alternative, Fast-Acting Non-Selective Liquid Weed Killer for Aquatic & Landscape Use - 1 Quart" brand: "alligare" price: "VT15502" currency: VUV in_stock: true reviews_count: 8 category: "Alligare" url: https://www.desertcart.vu/products/109305518-alligare-diquat-aquatic-herbicide-to-control-bluegrass-duckweed-hydrilla-more store_origin: VU region: Vanuatu --- # Kills weeds in under 1 hour Safe for aquatic environments & fish Concentrated 32oz liquid for multiple uses Alligare Diquat Aquatic Herbicide to Control Bluegrass, Duckweed, Hydrilla & More - Glyphosate Alternative, Fast-Acting Non-Selective Liquid Weed Killer for Aquatic & Landscape Use - 1 Quart **Brand:** alligare **Price:** VT15502 **Availability:** ✅ In Stock ## Summary > 🌿 Fast, fierce, and fish-friendly—weed control that means business! ## Quick Answers - **What is this?** Alligare Diquat Aquatic Herbicide to Control Bluegrass, Duckweed, Hydrilla & More - Glyphosate Alternative, Fast-Acting Non-Selective Liquid Weed Killer for Aquatic & Landscape Use - 1 Quart by alligare - **How much does it cost?** VT15502 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/109305518-alligare-diquat-aquatic-herbicide-to-control-bluegrass-duckweed-hydrilla-more) ## Best For - alligare enthusiasts ## Why This Product - Trusted alligare brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid Action Power:** Eradicates aquatic and terrestrial weeds within 60 minutes—no waiting, no comeback. - • **Trusted & Top-Ranked:** Rated 4.5 stars by over 1,200 users and ranked #112 in Weed Killers—join the savvy pros. - • **Eco-Conscious Formula:** Designed to protect your lake’s ecosystem while clearing unwanted vegetation safely. - • **Dual-Purpose Efficiency:** Use it both in water bodies and on land for versatile weed control. - • **Concentrated Convenience:** 32oz bottle yields multiple spray batches, maximizing value and minimizing hassle. ## Overview Diquat Aquatic Herbicide is a powerful, fast-acting liquid formula containing diquat dibromide that kills aquatic and terrestrial weeds within an hour. Safe for fish and aquatic life, this 32oz concentrated herbicide offers versatile, eco-conscious weed control trusted by thousands of users and ranked among the top weed killers in its category. ## Description Product description Review: Pre mix so it goes along way - Gets rid of the weeds n never bothered the fish.use about two weeks apart. Review: Effective for both lake weed control and ground plants - I've been using this chemical to control lake weeks for about 10 years. Here is what I've learned. This company (Lawn & Pest Control Supply) packs the product properly - with a tape seal and plastic bag - so that it can be easily unpacked. Do not purchase from NuFarm, they glue the lids closed with sealant so that the lids are impossible to remove without making a mess. Safety - this is super concentrated - wear gloves and SAFETY GLASSES - do not get it on your skin. I always pressure/leak test my spray rig before adding this chemical. Lake application - We use this to control underwater weeds in about 25 acres of a 40 acre lake. For preventative maintenance we apply a gallon every 3 (water temperature 85+) to 5 weeks (water temperature 55 to 65) using a 25 gallon sprayer to inject 3' below the water (in the sunlight zone). Never use more than 2 gallons (don't treat your entire lake at once!) because all the weeds will die and float making a big mess and killing your fish when the weeds decompose (taking all the oxygen from the water). I dilute 20 gallons of water to 1 gallon of water, injected at 4 gpm (2 down tubes) driving the boat at idle and holding a beer in the hand does the trick. Weeds need to be green/actively growing and in the sunlight zone (about 3' below the water) for this to work. Adding a gallon of copper improves the efficacy and makes the water more clear, although this year I am experimenting with coarse copper granules sprinkled in the root zones which seems to retard growth pretty well but does not kill unless applied at about a pound per 5 square feet. Do not apply below 50 degree water temp, the weeds must be growing and get sunlight for this product to work. Maximum efficacy by applying with at least 4 hours of sunlight after application and do not stir up the mud or all the chemical will bind with the mud instead of the leaves. Our lake is spring fed so it would be too expensive to dye. Using the diquat/copper combination we are able to keep the weeds under control and also maintain a healthy habitat. I also add a little bit of blue pond dye to help me see where I have applied. TIP - make sure to rinse your spray equipment with lots of clear water after use, this chemical is highly corrosive. Also it does stain fiberglass and carpet. I have also tried this chemical for killing weeds and grass at my house, at ~2oz per quart and it killed everything. Again be sure to spray when sun is forecast, this chemical works by interrupting the photosynthesis. ## Features - INSTANT WEED CONTROL: Expect visible results within hours, as hydrilla killer starts working immediately on contact with green plant tissue, making it an ideal solution when fast, effective weed control is needed with minimal downtime - GLYPHOSATE-FREE POWER: This non-selective aquatic herbicide for ponds provides broad-spectrum control without using glyphosate. It works quickly to kill a wide range of weeds and is ideal for those looking for an efficient and fast-acting substitute - RELIABLE ACROSS ALL TERRAINS: Whether treating water bodies or overgrown ground, the duckweed killer for ponds performs across both aquatic and land environments with consistent results. It is designed for use in ponds, lakes, drainage areas, and landscapes - TAKES DOWN TOUGHEST WEEDS: Our weed killer for ponds controls aggressive weeds such as duckweed, hydrilla, water hyacinth, & annual bluegrass. Our formula is built to handle hard-to-kill species and is ideal for restoring clean, manageable outdoor areas - RESIDUE-FREE REPLANTING: With 37.3 percent diquat dibromide, this weed and grass killer delivers quick control without leaving harmful residues. Safe for replanting after application, it supports sustainable weed management and soil health - Available for sale and use in AL, AK, AZ, AR, CA, CO, DE, FL, GA, HI, ID, IL, IN, IA, KS, KY, LA, MD, MA, MI, MN, MS, MO, MT, NE, NV, NJ, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, WV, WI, WY ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00HMBPGD6 | | Active Ingredients | Diquat dibromide, Herbicide | | Best Sellers Rank | #9,342 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #102 in Weed Killers | | Brand | ALLIGARE | | Brand Name | ALLIGARE | | Coverage | weed and moss control | | Customer Reviews | 4.6 out of 5 stars 1,270 Reviews | | Item Form | Liquid | | Item Weight | 2 Pounds | | Liquid Volume | 1 Quarts | | Manufacturer | Alligare | | Model Number | 000087 | | Part Number | 000087 | | UPC | 764966210049 | | Unit Count | 32.0 Fluid Ounces | ## Product Details - **Active Ingredients:** Diquat dibromide, Herbicide - **Brand:** ALLIGARE - **Item Form:** Liquid - **Item Weight:** 2 Pounds - **Liquid Volume:** 1 Quarts ## Images ![Alligare Diquat Aquatic Herbicide to Control Bluegrass, Duckweed, Hydrilla & More - Glyphosate Alternative, Fast-Acting Non-Selective Liquid Weed Killer for Aquatic & Landscape Use - 1 Quart - Image 1](https://m.media-amazon.com/images/I/71Pukgr-CfL.jpg) ![Alligare Diquat Aquatic Herbicide to Control Bluegrass, Duckweed, Hydrilla & More - Glyphosate Alternative, Fast-Acting Non-Selective Liquid Weed Killer for Aquatic & Landscape Use - 1 Quart - Image 2](https://m.media-amazon.com/images/I/71IojdScjVL.jpg) ![Alligare Diquat Aquatic Herbicide to Control Bluegrass, Duckweed, Hydrilla & More - Glyphosate Alternative, Fast-Acting Non-Selective Liquid Weed Killer for Aquatic & Landscape Use - 1 Quart - Image 3](https://m.media-amazon.com/images/I/81fg+yJC8aL.jpg) ![Alligare Diquat Aquatic Herbicide to Control Bluegrass, Duckweed, Hydrilla & More - Glyphosate Alternative, Fast-Acting Non-Selective Liquid Weed Killer for Aquatic & Landscape Use - 1 Quart - Image 4](https://m.media-amazon.com/images/I/81Rnxy-kQiL.jpg) ![Alligare Diquat Aquatic Herbicide to Control Bluegrass, Duckweed, Hydrilla & More - Glyphosate Alternative, Fast-Acting Non-Selective Liquid Weed Killer for Aquatic & Landscape Use - 1 Quart - Image 5](https://m.media-amazon.com/images/I/81KDTWHU2lL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Pre mix so it goes along way *by G***E on April 17, 2026* Gets rid of the weeds n never bothered the fish.use about two weeks apart. ### ⭐⭐⭐⭐⭐ Effective for both lake weed control and ground plants *by W***E on July 13, 2020* I've been using this chemical to control lake weeks for about 10 years. Here is what I've learned. This company (Lawn & Pest Control Supply) packs the product properly - with a tape seal and plastic bag - so that it can be easily unpacked. Do not purchase from NuFarm, they glue the lids closed with sealant so that the lids are impossible to remove without making a mess. Safety - this is super concentrated - wear gloves and SAFETY GLASSES - do not get it on your skin. I always pressure/leak test my spray rig before adding this chemical. Lake application - We use this to control underwater weeds in about 25 acres of a 40 acre lake. For preventative maintenance we apply a gallon every 3 (water temperature 85+) to 5 weeks (water temperature 55 to 65) using a 25 gallon sprayer to inject 3' below the water (in the sunlight zone). Never use more than 2 gallons (don't treat your entire lake at once!) because all the weeds will die and float making a big mess and killing your fish when the weeds decompose (taking all the oxygen from the water). I dilute 20 gallons of water to 1 gallon of water, injected at 4 gpm (2 down tubes) driving the boat at idle and holding a beer in the hand does the trick. Weeds need to be green/actively growing and in the sunlight zone (about 3' below the water) for this to work. Adding a gallon of copper improves the efficacy and makes the water more clear, although this year I am experimenting with coarse copper granules sprinkled in the root zones which seems to retard growth pretty well but does not kill unless applied at about a pound per 5 square feet. Do not apply below 50 degree water temp, the weeds must be growing and get sunlight for this product to work. Maximum efficacy by applying with at least 4 hours of sunlight after application and do not stir up the mud or all the chemical will bind with the mud instead of the leaves. Our lake is spring fed so it would be too expensive to dye. Using the diquat/copper combination we are able to keep the weeds under control and also maintain a healthy habitat. I also add a little bit of blue pond dye to help me see where I have applied. TIP - make sure to rinse your spray equipment with lots of clear water after use, this chemical is highly corrosive. Also it does stain fiberglass and carpet. I have also tried this chemical for killing weeds and grass at my house, at ~2oz per quart and it killed everything. Again be sure to spray when sun is forecast, this chemical works by interrupting the photosynthesis. ### ⭐⭐⭐⭐⭐ This stuff really works!! *by E***9 on May 15, 2025* This stuff is amazing. I have a lake in my backyard and every spring It starts to grow aquatic weeds. Also with the rains in April and May, it makes the water just kind of cloudy and yuck so I mix up a batch of this and it kills the aquatic leaves, but it’s safe for the fish. I also discovered that this stuff is lethal for any sort of regular weed. I was using regular weed killer and it would take a week or so to actually kill the weeds but never really just knock them out. So when I have extra of this stuff from the Lake. I put it on any weed that I want to annihilate. It kills them within an hour or so. I like that because they stay dead. They do not come back from this stuff. It is a little expensive to use as a total weed killer and you do need to have a soap or something so that it adheres to the weeds and you add it in your mixture when you’re using this... You use water, this stuff and I forget the name of what the soap thing is supposed to be called and you mix those three things together and you have your mixture. I get two batches out of each of these bottles. That requires two bottles of the soap stuff. I mix those in a sprayer and I’m good to go! This is good stuff! ## Frequently Bought Together - Diquat Aquatic Herbicide - Quart - Plex Mate Aquatic Surfactant for Herbicides – Quart- Non-Ionic, Increase Product Coverage, Increase Product Penetration, Increase Product Effectiveness - Cutrine-Plus Liquid Algaecide - 1 Gallon Professional-Grade Algae Killer for Lakes & Ponds, EPA Approved to Control All Types of Algae (Planktonic, Filamentous, and Chara) --- ## 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.vu/products/109305518-alligare-diquat-aquatic-herbicide-to-control-bluegrass-duckweed-hydrilla-more](https://www.desertcart.vu/products/109305518-alligare-diquat-aquatic-herbicide-to-control-bluegrass-duckweed-hydrilla-more) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-06-07*