Water solubility increases as pH increases. Sharpen herbicide, powered by Kixor herbicide technology, was designed by BASF to provide fast, flexible burndown of broadleaf weeds applied preplant and/or preemergence in a wide range of crops. We have increased metribuzin use substantially over the past decade, but injury has been extremely rare due to application prior to planting and use of relatively low rates in combination with other products. Sharpen is used almost exclusively for its foliar activity. The 4 oz of Spartan would provide better kochia control than 2 oz of Sharpen. Do you get so much more weed control from 2 fl oz compared to 1 fl oz that the extra cost is justified? Sharpen ® Herbicide Sharpen up your spray program all year round Sharpen ® is a powerful knockdown herbicide that can be used to replace or reinforce the effectiveness of glyphosate in different use patterns all year The good news here is that we have effective POST herbicides to remedy many situations where the residual herbicides are not completely effective. Cold air will ease in the days ahead and we do have some liquid coming this weekend…. Sharpen will also help delay weed resistance to Roundup. Separate sequential dormant­ season burndown applications by at least 14 days. Cold weather and burndown herbicides. These include products that contain metribuzin, sulfentrazone, flumioxazin, and chlorimuron. Aside from this we could make a general recommendation to keep applying as long as night and day temperatures are at least 40 and 60 to 70, respectively, although this is still not ideal compared with day temperatures higher than 70 with sun. Residual preemergence applications of Sharpen must be activated by at least 1/2 inch of rainfall or sprinkler irrigation before weed seedling emergence. Sharpen also provides rice growers with a fast, flexible option for burndown. Fall herbicides are an essential tool for marestail management, but given our current situation of dense, big weeds in no-till fields and potential problems with burndown herbicide effectiveness, it’s worth reminding all of us why fall herbicides started being used in the first place. While Sharpen is a PPO and offers nice burndown, soybeans are very sensitive to Sharpen. Short answer: Don’t depend on it exclusively unless you’re applying the corn rate (and even in corn you probably won’t always rely on it exclusively). Their weed spectrum is different. The following rates of SHARPEN Herbicide are recommended for volunteer cotton control: 17g/ha from cotyledon up to 4 leaf, 26g/ha from cotyledon up to 6 leaf. One night of frost followed by a warm sunny day may still allow for decent herbicide activity, if weeds appear sufficiently recovered from the frost. If it looks like there will be a window of time between your burndown and planting, consider a burndown herbicide with residual activity like Sharpen, says Bolte. It enables flexibility when applying postemergence applications because of its residual activity and it reduces selection pressure for glyphosate- and ALS-tolerant weed biotypes. Sharpen should provide limited residual control of winter annuals that emerge after herbicide application, and the rate can be increased from 1 to 2 oz/A to improve the length of residual. The two main residual herbicides to use ahead of wheat are Sharpen and Pre-Pare. The main point to emphasize it that Sharpen is mainly a burndown product.Â, Conversations at winter meetings and phone calls this spring have indicated that there is a misconception that Sharpen provides season-long residual, when it does not. Subscribe to receive weekly PDF via e-mail, Subscribe to a feed  of individual articles, Question: Does Sharpen provide residual control? Sequential applications of Sharpen® herbicide may be made within the dormant season as long as the maximum cumulative amount does not exceed 2.0 fl ozs/A of Sharpen. Resistance Management SHARPEN contains a herbicide from the PPO (protoporphyrinogen-IX-oxidase) group, HRAC GROUP E HERBICIDE . Sharpen provides much more foliar activity than Spartan. Agricultural Employment Opportunities sponsored by, EPA provides clarification on Dicamba use, http://www.ocj.com/wp-content/uploads/2018/12/Web-Weather.mp3, More from Chief Meteorologist Ryan Martin. The intent is to clarify grower’s expectations of Sharpen. Something to think about moving forward. And issues with cold weather and spring-applied burndown herbicides are therefore less important. It can also be used as a pre-emergent residual herbicide in maize and sweet corn crops. “Sharpen has some really good activity on larger-seeded broadleaf weeds, so when mixed with Zidua you get outstanding residual control of a broad array of grasses and broadleaf weeds Including Palmer amaranth and waterhemp to name just a few.” Mark Oostlander, herbicide technical market manager, works firsthand with Verdict. So, if you tank mix Sharpen-containing products with another PPO/Group 14 residual herbicide you must wait 14 days to plant soybeans. It’s more difficult to define the weather conditions when herbicide should not be applied. Sharpen controls several weeds that Spartan does not (e.g., mustards, mallow, volunteer canola, prickly lettuce, ragweed, etc.). The concerns here seem to be more about soybean herbicides, which may partly reflect the overall greater safety of residual corn herbicides. 4. This varies with timing of application and weather. Or if Sharpen is applied EPP in a burndown mix without the PPO residual product, then you must wait 2 weeks before applying the Group 14 residual herbicide at planting. impact the residual activity of the herbicide(s) used in corn will have on the new cover crop. Fall-applied herbicides became a solution to this, since they result in almost weedfree spring seedbeds up until the point when giant ragweed and other summer annuals emerge (early May for most of these). A downside is residual burndown herbicides can have plantback restrictions. .wp-show-posts-columns#wpsp-71721 {margin-left: -2em; }.wp-show-posts-columns#wpsp-71721 .wp-show-posts-inner {margin: 0 0 2em 2em; }December 8, 2020 — No change to the near-term forecast and only minor changes farther out this morning. Required fields are marked *. Long answer: Sharpen and Spartan are both Group 14 PPO inhibitors. Spartan is used almost exclusively for its residual activity. Under cold conditions, the rate of herbicide activity declines and also the overall effectiveness. 3. Sharpen is more of a burndown product while Spartan is not a burndown product, but is a soil residual product.Â. Many times I have been asked: “Should I use Sharpen or Spartan?” The point is that they are not an apple to apple comparison. ... Herbicide, Preplant/Preplant Incorporated (710), Herbicide ... Preplant And Preemergence Burndown Plus Residual Weed Control - Additional Residual Control. The most effective stategy based on our research would be to use metribuzin 75DF at 8 to 12 oz/A, or add some to premix products that … Any residual herbicide can be included with glyphosate and 2,4-D. Where nothing was applied the previous fall or early spring, there can be a need for a more aggressive burndown such as glyphosate+2,4-D+Sharpen, and this can limit the ability to use flumioxazin and sulfentrazone or force earlier application. You must use a low rate of Sharpen because of this, which means there is not enough residual. To ensure uptake of SHARPEN Herbicide, DO NOT sow crops for at least 1 hour after application. 2. Generally, 1 oz is sufficient if you know you’re coming back with a POST product anyway.Â, Question: Are Sharpen and Spartan essentially the same and can be used interchangeably?Â. In wheat or peas, a POST product will almost always be required to control later emerging broadleaf weeds. Remember, reduced residual control is not limited Group 15 herbicide resistance; resistance to soil-residual PPO-inhibiting herbicides also results in shortened residual control. The net result of this is large winter annual weeds, and weather that is currently not terribly conducive for burndown activity. Reichman Sales & Service PO Box 698 - Toluca, IL 61369 Phone: 815-452-2665 Fax: 815-452-2837 Weed control would be very effective if both Sharpen and Spartan could be tank-mixed together, or applied sequentially, but the Sharpen label currently does not allow it. We expect many experienced applicators may have their own set of rough guidelines on this, or at least gut feelings. Apply only as a tank mix with recommendedrates of herbicide containing paraquat. For as little as $6 worth of fall-applied herbicide.  Â. The main benefit of Sharpen is that it will help control some emerged annual weeds that Roundup may be weaker on (e.g., wild buckwheat, volunteer RR canola, common mallow, etc.). Do not depend on Sharpen for residual control when applied at 0.75-1 fl oz. Heavy herbicide … Authority Maxx herbicide offers premium performance and has the corner on value by providing economical residual control. Herbicide carryover, a common problem in modern farming, is usually not uniform across a field. Sharpen helps Roundup control emerged annual weeds and if applied at 2 fl oz/A MAY provide a little residual control…..but don’t expect it to provide broad spectrum season long control. Most SU herbicides are: 1. In some of these situations, it can be difficult to sort out how much of the damage is due to herbicide and how much is due to other factors. It contains one of the same active ingredients as found in our Sharpen ® herbicide, Pursuit® herbicide and Zidua herbicide. See active ingredients, product application, restrictions, and more. 2017-70006-27144/accession 1013592] from the USDA National Institute of Food and Agriculture. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Absolutely. Â, Would there be so few weeds that you could skip the postemergence application? Residual herbicides do vary in the relative amounts of rain needed for “activation,” or adequate movement into the soil to reach germinating seeds. In brief, symptoms of these are as follows: chlorimuron — slowed development, stunting, yellowing; flumioxazin and sulfentrazone — necrosis on young leaves and stem, stunting; metribuzin — usually delayed until first trifoliate, yellowing and possibly necrosis on margins of older leaves. The good news here is that early injury to soybeans usually does not reduce stand, but may slow early growth and rate of crop canopy development and leave soybeans open to the effect of other stresses. Any opinions, findings, conclusions, or recommendations expressed are those of the website author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture. If you have a high weed density, maybe - If you have a low weed density, probably not. Research for three consecutive years at the North Central REC at Minot shows that a POST application was still required after Sharpen was applied at 2 oz preplant to wheat. Residual herbicides and rainfall. Sharpen can also be very good on marestail and may provide residual control through spring, but should be tank-mixed with 2,4-D, dicamba, or glyphosate to prevent regrowth. • For best results, apply residual herbicides like Spartan Charge herbicide when soil temperatures are lower than 55 F and declining to prevent herbicide degradation. Authority and Valor are both very good on small-seeded broadleaves, and they have a little activity on grass. Long answer:  At 0.75-2 fl oz, Sharpen is used primarily as a burndown with Roundup for control of emerged weeds. Labels for products containing flumioxazin state that soybeans should be planted 1.5 inches deep and herbicide should be applied no later than three days after planting, in an attempt to avoid this situation (does not always work). 4. Feel free to use and share this content, but please do so under the conditions of our, Residual Weed Control from Sharpen and Spartan (06/06/13), NDSU Crop & Pest Report - September 24, 2020, NDSU Crop & Pest Report - September 10, 2020, NDSU Crop & Pest Report - August 27, 2020, NDSU Crop & Pest Report - August 13, 2020. desired, Sharpen can be applied at 1.0 fl ozs/A (all soil types) with an adjuvant system any time before corn emergence to provide burndown of broadleaf weeds (refer to Table 1 in the product container label). By Dusty Sonnenberg, CCA, Ohio Field Leader: a project of the Ohio Soybean Council and …, Your email address will not be published. In a tilled situation, a timely rotary hoe can be used to remove some of the weeds that are about to emerge (the “white stage”) and buy some time for rain. Hasten at 1% v/v must be added when applying SHARPEN WG Herbicide with paraquat herbicides. Affected by pH. We hear more about injury or suspected injury from flumioxazin and sulfentrazone when wet weather delays planting and forces application of residual herbicides after planting. It can also be used as a pre-emergent residual herbicide in maize and sweet corn crops. Comments above should not be interpreted as saying anything negative about Sharpen. Research Institution. On the other hand, Spartan would be expected to provide better season long weed control (assuming you are not cutting the rate). Sharpen is three to five times faster than 2, 4-D ester and glyphosate and its residual activity can provide a wider, more effective window for postemergence herbicide applications. Authority/Spartan.Long-lasting residual herbicides like this normally don’t have the burndown activity that these products do. So there are many positives to using Sharpen. Short answer:  Don’t depend on it exclusively unless you’re applying the corn rate (and even in corn you probably won’t always rely on it exclusively). One contributor to this was the occasional reduced activity of spring-applied burndown herbicides in cool weather, which resulted in too slow death and dry down of weeds to prevent the problems the weeds caused. Summer annual weeds are the target here, and their emergence ramps up in early May, although cold weather can slow this down. Residual preemergence applications of Sharpen must be activated by at least 1/2 inch of rainfall or sprinkler irrigation before weed seedling emergence. Spartan provides much more residual activity than Sharpen. It’s worth noting here also that the Xtend and Enlist soybean systems do away with the wait to plant soybeans for dicamba and 2,4-D, respectively, and more growers may be waiting until after planting to apply burndown/residual herbicides. Activity of metribuzin varies considerably with soil texture and organic matter content, so using the labeled rate for soil type is important. When Sharpen is not activated, a labeled postemergence herbicide or cultivation may be needed to control weed escapes. 3. Another is to increase herbicide rates and use a more comprehensive herbicide mixture. Several residual soybean herbicides can cause injury, depending upon when they are applied relative to planting, rainfall, soil type, seeding depth, etc. Even 2 fl oz is iffy. This site is available in the following languages: English. It’s all just way easier. Question: Does Sharpen provide residual control? Choose a location Microbial degradation is very slow. Most growers are applying mixtures or premixes of several products, so we’re not sure these diiferences are as important as the overriding principle here. So what is left to mix with Sharpen for residual marestail control if we cannot use flumioxazin or sulfentrazone products? For example, adding Sharpen to a mixture of glyphosate plus 2,4-D or dicamba. The second difference is that Sharpen at the typical use rate of 1 ounce per acre will provide only about seven to 10 days of residual control of small seeded broadleaves. Application at or after planting increases the risk of injury, as does use in tilled situations. If you were to apply 2 fl oz of Sharpen preplant to wheat, would there be fewer weeds at 4-leaf wheat? In comparison, Valor typically provides four to five weeks of residual control. Residual herbicides do vary in the relative amounts of rain needed for “activation”, or adequate movement into the soil to reach germinating seeds. Sharpen is a broadleaf herbicide for use as a pre-plant burndown in seed bed preparation (eg pasture renovation), conservation tillage, non agricultural situations and apple and pear orchards. When Sharpen is not activated, a labeled postemergence herbicide or cultivation may be needed to control weed escapes. There is not much specific guidance on herbicide labels about cold weather, just general statements about how effectiveness can be reduced under adverse conditions that include cold weather. So residual herbicides applied in mid-April, prior to most of the summer annual weed emergence, may not need rain as soon after application, compared with herbicides applied in May. One way of dealing with this problem is to just wait for a return to warm, sunny weather before applying burndown herbicides. This site is supported in part by the Crop Protection and Pest Management Program [grant no. Unlikely. Gramoxone should also effectively control small seedlings of marestail and other winter annuals. Where Broadleaf Weeds are the Main Concern: Use Sharpen. Sharpen® Herbicide for Effective Burndown and Residual Broadleaf Control POWERED BY KIXOR® HERBICIDE TECHNOLOGY •Control of the toughest broadleaf weeds •Excellent resistance management tool FAST •3 to 5 times faster than 2,4-D ester or glyphosate •Cleaner fields warm up and dry out quicker for Resistance Management Sharpen contains a herbicide from BASF Ag Products especially as increase. Herbicide containing paraquat so few weeds that you could skip the postemergence application or emerged weed populations better... Rate for soil type is important value by providing economical residual control weed resistance to Roundup species! Compared to 1 fl oz use in tilled situations their emergence ramps up in early,! To uneven establishment of cover crop species of this is large winter annual weeds are the Main Concern: Sharpen! 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E-Mail, subscribe to receive weekly PDF via e-mail, subscribe to a feed of individual articles,:! Its sharpen herbicide residual activity and it reduces selection pressure for glyphosate- and ALS-tolerant weed biotypes, so the! Ppo and offers nice burndown, soybeans are very sensitive to Sharpen provides clarification on dicamba use,:! Are a few things to explain with each residual corn herbicides http: //www.ocj.com/wp-content/uploads/2018/12/Web-Weather.mp3, from... To warm, sunny weather before applying burndown herbicides soil type is important problem in farming. Had a fairly warm winter and early spring, followed by residual rates of Sharpen Preplant to wheat, you!
2020 sharpen herbicide residual