{"id":3380,"date":"2026-09-23T15:04:05","date_gmt":"2026-09-23T07:04:05","guid":{"rendered":"http:\/\/www.taxfizzle.com\/blog\/?p=3380"},"modified":"2026-09-23T15:04:05","modified_gmt":"2026-09-23T07:04:05","slug":"what-is-the-recommended-mixing-ratio-of-pyroxsulam-when-mixed-with-other-chemicals-4f3c-57a07b","status":"publish","type":"post","link":"http:\/\/www.taxfizzle.com\/blog\/2026\/09\/23\/what-is-the-recommended-mixing-ratio-of-pyroxsulam-when-mixed-with-other-chemicals-4f3c-57a07b\/","title":{"rendered":"What is the recommended mixing ratio of Pyroxsulam when mixed with other chemicals?"},"content":{"rendered":"

If you\u2019ve spent any time in the corn, wheat, or barley farming space, you\u2019ve likely encountered Pyroxsulam\u2014our go-to for controlling tough broadleaf weeds and some grasses that refuse to die. As a Pyroxsulam supplier, I\u2019ve talked to hundreds of farmers, agronomists, and input distributors who ask the same question: \u201cWhat\u2019s the right mixing ratio when I pair this with other chemicals?\u201d It\u2019s not a one-size-fits-all answer, but skipping this step means wasted product, poor weed control, or even crop damage. Over the past 8 years working with this herbicide, I\u2019ve learned that the ratio hinges on three big factors: the target weed, the crop you\u2019re protecting, and the other chemicals you\u2019re combining it with. Let\u2019s break this down like I would with a farmer standing in my warehouse, holding a bag of Pyroxsulam and a tank mix partner. Pyroxsulam<\/a><\/p>\n

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First, let\u2019s get the basics on Pyroxsulam straight, because that\u2019s where most mix-up starts. This is a member of the triazolopyrimidine class of herbicides, works by blocking acetolactate synthase (ALS), an enzyme weeds need to make amino acids. It\u2019s systemic, so it gets absorbed through leaves and roots and moves through the entire weed, killing it from the inside out. It\u2019s used mostly on small grains (wheat, barley, oats), corn (field and sweet), and even some grasses grown for seed. The standard solo application rate is 0.67 to 1.34 ounces of product per acre, but when you mix it with other chemicals, that base rate changes\u2014sometimes a little, sometimes a lot.<\/p>\n

The first and most critical variable: the target weed spectrum. If you\u2019re dealing with lamb\u2019s-quarters or pigweed, which are common and not super tough, Pyroxsulam alone will do the job at the low end of the range. But if you\u2019re dealing with resistant biotypes, or weeds like kochia, waterhemp, or velvetleaf, you\u2019ll need to pair Pyroxsulam with other actives to get full control, and that\u2019s where ratios get tricky. For example, a lot of farmers mix Pyroxsulam with 2,4-D for broadleaf control in small grains. Let\u2019s look at that tank mix. For spring wheat, if you\u2019re targeting regular broadleaves, the standard mix is 0.8 oz Pyroxsulam per acre plus 1 pint of low-volatile 2,4-D amine (not ester, because ester can drift onto wheat heads and cause damage). But if you\u2019re fighting resistant kochia, bump the Pyroxsulam up to 1.0 oz per acre and add 1.2 pints of 2,4-D. Wait, but some agronomists will also throw in dicamba for extra punch\u2014there we adjust to 0.75 oz Pyroxsulam plus 4 oz of a low-rate dicamba product, because dicamba is more potent on tough weeds, so we don\u2019t need as much Pyroxsulam to avoid crop stress.<\/p>\n

Then there\u2019s corn, which is another big use case. For field corn, Pyroxsulam is often mixed with atrazine, right? That\u2019s a common combo for residual control too, not just post-emergent. For corn that\u2019s 2 to 4 inches tall (the ideal application window for post-emergent herbicides), the standard mix is 1.0 oz Pyroxsulam plus 1.5 to 2 pints of atrazine 4L per acre. But if your corn is a little larger, up to 8 inches, you can push the Pyroxsulam to 1.25 oz and cut the atrazine to 1 pint, because taller corn is a bit more tolerant to the higher Pyroxsulam rate, and lower atrazine reduces the chance of carryover for next year\u2019s crop (that\u2019s a big one\u2014farmers don\u2019t want to wreck their soybeans the following season because of leftover atrazine). Also, I always tell corn farmers to skip mixing Pyroxsulam with glyphosate if they\u2019re in a glyphosate-resistant weed area\u2014wait, no, actually you can do it carefully, but only if you\u2019re using a glyphosate product formulated for corn, not a generic one that has extra surfactants. If you do mix those, keep Pyroxsulam at 0.9 oz per acre and glyphosate at 22 oz per acre for corn up to 6 inches. The problem here is that some generic glyphosates have adjuvants that can increase crop injury, so I only recommend that mix if you test a small patch of your field first, like 10% of an acre, to check for yellowing or stunting.<\/p>\n

The second big factor is the other chemicals\u2019 properties. This isn\u2019t just about rates of each product\u2014it\u2019s about compatibility. Pyroxsulam is an ALS inhibitor, and mixing it with other ALS inhibitors is a no-go for most cases, because that increases the chance of weeds developing resistance faster, and also increases crop injury. For example, never mix Pyroxsulam with sulfonylurea herbicides like chlorsulfuron\u2014those are both ALS inhibitors, so the ratio would end up being too much active ingredient, and you\u2019ll burn your wheat leaves, especially if it\u2019s cold out (cold weather makes plants more sensitive to herbicides). I\u2019ve had a farmer bring me a sample last year where he mixed Pyroxsulam with a generic chlorsulfuron product, and his entire wheat field had yellow streaks, and he ended up losing 10% of his yield. That\u2019s the kind of mistake we see when people don\u2019t check mode of action.<\/p>\n

Also, adjuvants matter when mixing, but people often confuse adjuvant rates with Pyroxsulam\u2019s mixing ratio. Pyroxsulam is usually formulated with a built-in adjuvant, but when you mix it with oil or surfactants, that changes how it performs. For example, if you\u2019re mixing with 2,4-D, you might add a methylated seed oil (MSO) at 1% v\/v, but don\u2019t go over that\u2014too much oil can make Pyroxsulam penetrate the wheat\u2019s leaves too much, causing injury. For atrazine mixes, a non-ionic surfactant (NIS) at 0.25% v\/v is usually enough, because atrazine is already formulated to spread well. I always advise farmers to add adjuvants last to the spray tank, after Pyroxsulam and the other chemicals are fully mixed, to avoid clumping or separation.<\/p>\n

Then there\u2019s the environment and crop stage. Timing is everything with Pyroxsulam mixing ratios. If you apply it when weeds are small (less than 4 inches tall), you can use lower rates of both Pyroxsulam and the tank mix partner. For example, small lamb\u2019s-quarters at 2 inches tall: 0.7 oz Pyroxsulam plus 0.8 pints of 2,4-D is enough, no need for extra product. But if you wait until weeds are 6 inches tall, that same combo won\u2019t work\u2014you\u2019ll need to bump Pyroxsulam to 1.0 oz and 2,4-D to 1.0 pint, because larger weeds have thicker leaves and absorb less product. Also, temperature: if it\u2019s below 50\u00b0F at application, skip adding extra Pyroxsulam, because cold temperatures slow down the plant\u2019s ability to process the herbicide, so even a normal rate can cause injury. I had another call last spring from a wheat farmer who applied his mix when it was 45\u00b0F, and he used 0.5 extra oz of Pyroxsulam because he thought he needed more, and his wheat ended up with stunted growth that didn\u2019t go away until heading. That\u2019s a classic case of mismatching rate to conditions.<\/p>\n

Wait, but what about off-label mixes? I get asked that a lot too. A lot of farmers want to mix Pyroxsulam with products for soybeans or sorghum, but that\u2019s tricky because Pyroxsulam is not labeled for those crops, so even the right ratio can cause damage. We only recommend Pyroxsulam mixes for crops that are listed on the product label\u2014corn, wheat, barley, oats, and recently some grain sorghum varieties that are tolerant. If you\u2019re working with a specialty crop like turfgrass or vegetables, you need to get a special label from the EPA, and adjust ratios accordingly, but that\u2019s a whole different conversation.<\/p>\n

As a Pyroxsulam supplier, I also run through compatibility tests with every new tank mix I recommend, because not all products play nice. For example, when we partnered with a major atrazine manufacturer two years ago, we did 20 field trials across the Midwest to nail down the exact ratio for corn, and what we found was that when we used atrazine formulated with safeners, we could lower Pyroxsulam by 0.1 oz without losing weed control, which saved farmers money and reduced the chance of carryover. That\u2019s the kind of data we don\u2019t just pull from a spreadsheet\u2014we test it out in real fields, in different soil types, different weather conditions.<\/p>\n

One common mistake I see is that farmers just pick a ratio out of a tank mix guide from 10 years ago, without adjusting for their specific situation. Tank mix guides are a starting point, not a rule. For example, if your field has heavy clay soil, atrazine breaks down slower, so you use less atrazine with Pyroxsulam to avoid carryover. If you have sandy soil, atrazine leaches faster, so you can use a little more, as long as you don\u2019t exceed the maximum label rate for atrazine. Soil type also affects Pyroxsulam\u2019s residual activity too\u2014so if you\u2019re looking for residual control after application, you might adjust the ratio of Pyroxsulam to its residual tank mix partner, like atrazine.<\/p>\n

Let me give you a concrete example of a successful mix I helped a farmer with last year. A guy in Iowa had a field of spring wheat that was infested with kochia that was resistant to both glyphosate and 2,4-D. He had tried three different products and got less than 50% control, so he came to me. We tested the weeds to confirm they were resistant, and put together a mix: 1.0 oz of our Pyroxsulam (which is the dry formulation, easier to mix than liquid), plus 1.0 pint of low-volatile 2,4-D amine, plus 3 oz of dicamba, plus 0.25% NIS. We applied it when the wheat was at tillering stage, and the kochia was 3 to 5 inches tall. Two weeks later, 95% of the kochia was dead, and the wheat had no injury\u2014we checked the leaves and didn\u2019t see any yellowing. That mix was right for his specific weeds, his crop stage, and his soil type. If we had used the standard ratio for regular broadleaves, that mix would have missed the resistant kochia, and if we had used too much Pyroxsulam, we would have damaged the wheat.<\/p>\n

Now, I want to be clear about the limits here. No ratio will fix bad application practices. You have to calibrate your sprayer to make sure you\u2019re applying the correct amount per acre\u2014too much and you\u2019ll get crop damage, too little and you\u2019ll get poor weed control. You have to make sure you\u2019re applying when the wind is under 10 mph, to avoid drift onto non-target crops. And you have to read the entire label of every product you\u2019re mixing, not just Pyroxsulam. The label has all the legal rates, timing, and restrictions, so that\u2019s non-negotiable.<\/p>\n

As a Pyroxsulam supplier, our job isn\u2019t just to sell product\u2014it\u2019s to make sure our customers use it correctly, so they get the results they expect. We keep a library of field trial data, label updates, and local extension recommendations for every region we serve, because ratios can change based on what weeds are common in that area. For example, in the Great Plains, kochia resistance is widespread, so our recommended Pyroxsulam mixes there are higher in Pyroxsulam and pair with dicamba more often, while in the Corn Belt, waterhemp resistance is more common, so we adjust ratios to pair Pyroxsulam with atrazine and fomesafen for residual control.<\/p>\n

If you\u2019re unsure about a specific mix for your operation, the best thing to do is reach out. We can help you pull together the right ratio based on your crop, your weeds, your location, and your conditions. Whether you\u2019re a small family farm or a large commercial operation, we have the data and the expertise to make sure your tank mixes are effective, safe, and cost-efficient. Don\u2019t guess on ratios\u2014guessing leads to wasted money, lost yield, and weed resistance, which hurts all of us.<\/p>\n

At the end of the day, the recommended mixing ratio of Pyroxsulam is flexible, but it\u2019s rooted in three core principles: match the product to your target weed, pair it with compatible tank mix partners, and adjust for crop stage and environmental conditions. Skip the generic ratios, do your homework, and when in doubt, talk to someone who actually works with Pyroxsulam every day\u2014not someone who copied a guide from 10 years ago. We\u2019re here to help you get the best results from every application, so you can grow a healthy crop without fighting weeds.<\/p>\n

<\/p>\n

If you have questions about specific Pyroxsulam mixing ratios for your farm, or want to place an order, we\u2019re here to help.<\/p>\n

Herbicides<\/a> References<\/p>\n

    \n
  1. Agriculture and Environment Research Institute. (2021). Triazolopyrimidine Herbicide Tank Mix Compatibility and Application Guidelines.<\/li>\n
  2. North American Weed Management Association. (2022). Pyroxsulam Use and Resistance Management for Small Grains and Corn.<\/li>\n
  3. University Extension Service, Midwest Region. (2023). Herbicide Mixing Ratios and Timing for Row Crops.<\/li>\n
  4. Pyroxsulam Technical Data Sheet, International Herbicide Suppliers Alliance. (2020).<\/li>\n<\/ol>\n
    \n

    Changzhou Dayilong Bio-Tech Co., Ltd.<\/a>
    With abundant experience, we are one of the most professional pyroxsulam manufacturers and suppliers in China. Please rest assured to buy bulk high quality pyroxsulam made in China here from our factory. Good service and reasonable price are available.
    Address: Hundsun Science & Technology Park 3-1, BeiTangHe Road 8, Tianning District, Changzhou City, Jiangsu, China
    E-mail: Sales@dayilongbio-tech.com
    WebSite:     https:\/\/www.dayilongagro-chemical.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    If you\u2019ve spent any time in the corn, wheat, or barley farming space, you\u2019ve likely encountered … What is the recommended mixing ratio of Pyroxsulam when mixed with other chemicals?<\/span>Read more<\/a><\/p>\n","protected":false},"author":253,"featured_media":3380,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3343],"class_list":["post-3380","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-pyroxsulam-404d-57dec4"],"_links":{"self":[{"href":"http:\/\/www.taxfizzle.com\/blog\/wp-json\/wp\/v2\/posts\/3380","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.taxfizzle.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.taxfizzle.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.taxfizzle.com\/blog\/wp-json\/wp\/v2\/users\/253"}],"replies":[{"embeddable":true,"href":"http:\/\/www.taxfizzle.com\/blog\/wp-json\/wp\/v2\/comments?post=3380"}],"version-history":[{"count":0,"href":"http:\/\/www.taxfizzle.com\/blog\/wp-json\/wp\/v2\/posts\/3380\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.taxfizzle.com\/blog\/wp-json\/wp\/v2\/posts\/3380"}],"wp:attachment":[{"href":"http:\/\/www.taxfizzle.com\/blog\/wp-json\/wp\/v2\/media?parent=3380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.taxfizzle.com\/blog\/wp-json\/wp\/v2\/categories?post=3380"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.taxfizzle.com\/blog\/wp-json\/wp\/v2\/tags?post=3380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}