Pre harvest desiccation. I have asked for clarification of the label from Monsanto.

Pre harvest desiccation. , 1998; Bennett and Shaw Jan 5, 2020 · Soybean dessication combined with other factors can lead to earlier harvest and increase efficiency. Late season moisture can give new life to late emerging plants or branches. Oct 15, 2018 · The best desiccation capacity as harvest aid for castor crop was observed with the herbicide 2,4-D (670 or 1340 g ha −1 a. Green stalks, weeds, uneven ripening can all be a problem at harvest. Preharvest weed control most often involves the application of a systemic herbicide like glyphosate (e. PRE-HARVEST DESICCATION When glyphosate is used for “pre-harvest desiccation,” it is sprayed on the crop after it has already matured. Timing Proper desiccation timing is critical to prevent yield and quality loss, and residue accumulation in the seed. [4 Aug 4, 2025 · Greg Bartley is the director of crop protection and crop quality at Pulse Canada. The objective of this study was to evaluate the use of diquat, glufosinate ammonium, saflufenacil and flumioxazim, positioned alone and/or combined, in the pre-harvest desiccation of soybean crops. Aug 19, 2022 · A few factors need to be considered when deciding on a harvest aid, including application timing, avoiding grain loss due to shattering or seed quality decline, pre-harvest interval associated with herbicide application and harvestability due to green stem. They suggested desiccation may be beneficial if other harvest factors (e. “Take care when applying pre-harvest desiccants to ensure that sensitive adjacent crops are not being affected,” Agriculture Commissioner Doug Goehring said. The use of glyphosate to kill crops just before harvest originated in Aug 25, 2023 · It is time to think about desiccation and pre-harvest weed control. This study aimed to evaluate the spray quality and defoliation efficiency of diquat applied at different spray volumes using drones and a CO2 pressurized Jul 21, 2022 · The objective of this study was to evaluate the use of diquat, glufosinate ammonium, saflufenacil and flumioxazim, positioned alone and/or combined, in the pre-harvest desiccation of soybean crops. What better time than now for a refresher on your pre-harvest herbicide options? When done correctly, a pre-harvest herbicide application can provide numerous benefits including maximizing yield and quality, allowing for direct combining of standing crops, managing weed escapes from the growing season What is the difference between a preharvest aid and a desiccant? Two types of chemicals are available to assist with flax harvest management: pre-harvest herbicides (sometimes called harvest-aids) and desiccants. Pre-Harvest Applications in Wheat Staging wheat for pre-harvest weed control can be tricky, especially in years when the crop is uneven due to poor conditions. AgriBrasilis – What is the cost-benefit of glufosinate and diquat desiccants? Pre-harvest desiccation allowed for an earlier harvest by 15 days for dry beans and 12 days for winter beans, regardless of the application method or spray volume. Field studies were conducted to determine the effects of diquat, paraquat, and ethephon applications on grain moisture, grain weight, and seed ger-mination of hybrid rice Yanliangyou 88 (Oryza sativa ssp. What is new is that more farmers Reglone® - Pre-harvest weed control and crop desiccation REGLONE® is a non-selective contact herbicide containing 200g/L diquat present as diquat dibromide monohydrate. Apr 1, 2007 · Pre-harvest desiccation of rapeseed crop may allow a more timely harvest as well as increase the speed and harvest operation efficiency as a second crop after rice. Jul 22, 2025 · Pre-Harvest Weed Control and Desiccation Options for Flax: Glyphosate & Diquat (Reglone Ion - Syngenta) are registered. For this purpose, a field experiment was conducted, with application of the treatments in the phenolog … Canola growers use pre-harvest sprays for weed control, desiccation and uneven crop. Mar 14, 2023 · Soil management systems directly interfere in the soil–plant relationship. I have asked for clarification of the label from Monsanto. Field studies were conducted to determine the effects of diquat, paraquat, and ethephon applications on grain moisture, grain weight, and seed germination of hybrid rice Yanliangyou 88 (Oryza sativa ssp. is sometimes used as a pre-harvest treatment to regulate plant growth and ripening; however, uses for desiccation to control the time point of harvest or to optimise threshing are not permitted in the EU. Aug 4, 2025 · MRLs and Pre-Harvest Desiccation With Greg Bartley Episode 12 • 4th August 2025 • Growing Pulse Crops • Pulse Crops Working Group 00:00:00 00:28:08 Pre-harvest desiccation of cereals & oilseed rape Many growers will face a harvest with crops of extremely varied maturity and due to the lack of ground cover infested with late germinating weeds exacerbated by any late season rain slowing the harvest, increasing shedding and increasing the drying costs. See below for dry bean desiccation timing and pre-harvest weed control and desiccation products. Sep 13, 2024 · Diquat and glufosinate can replace paraquat in pre-harvest desiccation of soybean plants, and glufosinate also provide greater management flexibility, in anticipating the harvest. Late season rains following a extended dry period can often result in canola stalks staying green or result in canola regrowth further delaying harvest. Given the scrutiny that glyphosate is currently receiving Paul McIntosh, WeedSmart’s northern extension agronomist, says it may be a good time to start looking for alternative means of Agricultural crops: Potatoes, cotton, soybeans, corn (pre-harvest desiccation to dry green tissues and weeds). May 20, 2025 · Pre-harvest desiccation allowed for an earlier harvest by 15 days for dry beans and 12 days for winter beans, regardless of the application method or spray volume. Cereals Desiccation, swath timing and pre-harvest glyphosate are all right around the same stage and that is physiological maturity which is 30% moisture. Proper timing for pre-harvest weed control would typically be when the seed has reached 30% moisture or less, which is about 30-40% seed color change1. Aug 25, 2022 · Preharvest herbicide treatments are primarily intended to suppress/kill and desiccate weeds that can make harvest more difficult. Check through these options to see which scenario sounds like yours and which products may be best suited for you. Jul 21, 2022 · Pre-harvest desiccation of soybean plants with glyphosate has been routinely conducted by seed producers, although it is not recommended because it may reduce seed physiological quality. However, there are few herbicides registered for this practice, and may present different results according to the culture region of the crop. Dec 25, 2014 · While the data on glyphosate use in pre-harvest application is either proprietary or non-existent, the testimony of numerous farmers speak to the fact that glyphosate desiccation is a rare Pre-harvest desiccation of soybeans requires an ideal time to be carried out, with the R7. Getting the crop off as soon as possible prevents further stalk damage. Objective In view of this, the objective of this study was to evaluate the effects of the Desiccation Desiccation is common practice in dry bean production for uniform dry-down and weed control, but it does not bring about or speed up maturity. It is fast-acting non-volatile, aqueous solution, providing unrivalled speed of kill in the destruction of green plant tissue. Covers swathing, applying glyphosate, when to start pre-harvest management and more. Oct 8, 2021 · Soybean desiccation Soybean desiccation is not a new tool in other parts of the country, it has just not been used in Illinois with any frequency. The goal is to totally kill the crop, so that it dries out faster and can be harvested a few weeks sooner, thus lessening the risk that it will be destroyed through bad weather or rot. Thus, the aim of this research Jun 4, 2024 · It is frequently used for pre-seeding weed control and applied in-crop to herbicide tolerant crops, as well as pre- or post-harvest applications for crop desiccation and perennial and winter annual weed control. Another little-known topic is the influence of pre-harvest desiccation on the physiological quality of soybean seeds, especially on seed longevity. Pre-harvest Weed control and Desiccation Options for Flax Harvestability has been and continues to be a significant challenge for flax growers and, when considered along with subsequent residue management issues, is an important reason that many non-flax growers express resistance to this crop. This allows for quicker, cleaner harvesting — especially useful in the UK, where wet summers can delay combining and damage crops. i. Aug 8, 2025 · With a single exception, all harvest aid products have a labeled pre-harvest interval (PHI) that must be followed post-application. This article provides specifics for each product option. , 1998; Bennett and Shaw Aug 3, 2021 · A pre-harvest Glyphosate application is typically used for controlling the late flush of weeds before they set seed and contribute to the fields seed bed. When the Canola growers use pre-harvest sprays for weed control, desiccation and uneven crop. However, growers should consult with their oat buyers to ensure that they will purchase oats treated with pre-harvest glyphosate. Jan 1, 2010 · Pre-harvest desiccation of soybean plants with glyphosate has been routinely conducted by seed producers, although it is not recommended because it may reduce seed physiological quality. Glyphosate Glyphosate is registered for pre-harvest perennial weed control in canola. Sharpen herbicide drives fast burndown with residual control & is a premier harvest aid for crop desiccation in soybeans, cotton, canola & dry beans. Desiccation is the application of a contact herbicide or true desiccant that will dry down plant material and advance harvest (Table 1). Dec 5, 2020 · Desiccation and crop topping with pre-harvest herbicide application is a useful way to reduce seed set in late germinating weeds and is an effective harvest aid for cereal grain, pulse and oilseed crops. Oct 25, 2016 · A pre-harvest herbicide is a slower acting desiccant that is absorbed and translocated to the root. Apr 1, 2007 · Pre-harvest desiccation of a grain crop may allow more timely harvest as well as increase the speed and efficiency of the combine operation. Oct 14, 2024 · Pre-harvest glyphosate application, often referred to as pre-harvest desiccation or ripening aid, involves spraying Roundup (or a glyphosate-based herbicide) on wheat crops shortly before they are harvested. What is not so well known is that farmers also use glyphosate on crops such as wheat, oats, edible beans and other crops right before harvest, raising concerns that the herbicide could get into food products. japonica). Recently, this year, a registration of florpyrauxifen-benzyl was approved, which is a new type of product to be used for pre-harvest desiccation of soybeans. The efficacy of desiccants as harvest-aids to reduce weed interference and improve grain quality has been widely reported for leguminous crops (Cole and Cerdeira, 1982; Ellis et al. Harvest time is either here, or rapidly approaching for many farmers across the province. Desiccants registered as harvest aid products are commonly contact herbicides with fast-acting modes of action. Sep 11, 2025 · Pre-harvest desiccation with glyphosate is a used practice to accelerate maturation and standardize harvest. The herbicide is sprayed when the grain has reached maturity but while the stems Oct 14, 2015 · Pre-harvest desiccation may increase the efficiency of seed production. Aug 20, 2015 · Function, timing and rotation restrictions are important to consider when selecting a pre-harvest herbicide for dry beans. Aug 14, 2015 · Pre-harvest glyphosate – Staging against is very similar to desiccation, bottom and middle pods will be brown and dry, while the top pods will begin to be turning yellow. Early soybean harvesting, aided by chemical desiccation, reduces pest damage, fungal damage, and promotes uniform maturation. Aug 4, 2025 · MRLs and Pre-Harvest Desiccation With Greg Bartley Episode 12 • 4th August 2025 • Growing Pulse Crops • Pulse Crops Working Group 00:00:00 00:28:08 Aug 14, 2013 · Understand How & When to use Pre-Harvest Herbicide. Pre-harvest desiccation economically and effectively enables timely harvest during unfavorable weather conditions. At least three days between application and swathing (or combining) will provide time for the herbicide to be taken up and translocated throughout the weeds. Jun 26, 2025 · Glyphosate is the only herbicide registered for pre-harvest desiccation in sunflowers, and its increasing presence in wheat and other cereal grains is due to pre-harvest crop desiccation. Pre-harvest herbicides are non-selective systemic herbicides that provide late season perennial weed control and may improve the harvestability of the crop by reducing the amount of In view of the need to clarify the most appropriate moment to perform the pre-harvest desiccation and its effects on the main physical and physiological attributes of soybean, this work had as objective to define which soybean phenological stage is adequate to promote pre-harvest desiccation and to measure the effects of this procedure on the Pre-harvest desiccation may increase the efficiency of seed production. [1][2][3] Crop desiccants (not to be confused with chemical desiccants) include herbicides and defoliants, used to accelerate Crop desiccation at its finest Benefits of applying herbicide applications pre-harvest As harvest season approaches, a farmer’s work is far from over. 4. Sep 8, 2025 · After harvest, review the season’s performance to inform next season’s hybrid selection Timing Desiccation for Improved Soybean Harvest When it comes to early planted beans in March and April, desiccation can be a valuable harvest management tool, according to Jason Ruddick, Pioneer Field Agronomist in Arkansas. Particularly in years with thinner stands, weeds can maintain a foothold. He’s an agronomist by training and a certified crop advisor who has been with Pulse Canada for over six years. Glyphosate products list guar along with numerous other legumes for a variety of pre-plant, pre-emerge, and post-harvest applications, but the label appears to limit pre-harvest applications to only a few legume vegetable crops NOT including guar. Jan 20, 2025 · Glyphosate, a probable carcinogen, is widely used as a pre-harvest drying agent on staple crops, raising health and safety concerns. , excessive weed growth) justified the use of a pre-harvest treatment. Aug 23, 2017 · The Do’s and Don’ts of Desiccants The ideal harvest aid options will vary depending on your field conditions, harvest plan and weather forecast. Desiccation Do you have questions about pre-harvest application on your pulse and flax crops? We have been getting a few calls and texts so I thought this email might be helpful. Pre-harvest crop desiccation is the application of an agent to a crop just before harvest to kill the leaves and/or plants so that the crop dries out from environmental conditions, or "dry-down", more quickly and evenly. With the exception of glyphosate, pre-harvest desiccation at the R6. , Roundup) that will control excessive weed pressure (especially perennials) before harvest. Bartley discusses the Keep It Clean Program in Canada, the value and challenges associated with Maximum Residue Limits (MRLs), some helpful information about desiccants and how various perceptions Abstract Background Pre-harvest desiccation has become common in systems grown with soybeans, mainly by the need to harvest anticipation for grains or seeds. May 22, 2025 · This controversial technique, known as pre-harvest desiccation, speeds up harvesting and increases crop uniformity. ) applied either isolated or in combination with glyphosate (1440, 1880, or 2160 g ha −1 a. Desiccants or pre-harvest glyphosate products can help with timely defoliation and reduce yield losses caused by harvest delays as well May 6, 2018 · The objective of this research is to define which soybean phenological stage is adequate to promote pre-harvest desiccation and to measure the effects of this procedure on the physical and Oct 15, 2018 · The best desiccation capacity as harvest aid for castor crop was observed with the herbicide 2,4-D (670 or 1340 g ha −1 a. May 21, 2020 · TL;DR: With the exception of glyphosate, pre-harvest desiccation at the R6. With a late harvest looming, and uneven seed maturity causing problems, many producers go looking for a way to speed harvest. Defol 5 (sodium chlorate) has a suggested range of harvest dates post-application. How to manage wheat before harvest. If the problem is uneven fields, swathing is the best choice. When applied at the recommended seed moisture content of 30%, pre-harvest glyphosate had a similar impact on oat yield or seed quality as swathing regardless of seeding rate or cultivar grown. Sep 12, 2025 · Pre-harvest scouting corn fields, soybean desiccation can improve harvest success Farm News Media When prioritizing corn fields for harvest, start with estimating yields, which can be done digitally using the Pioneer Corn Yield Estimator or in the Granular Mobile app for quick, in-field yield estimates. Temperature fluctuations associated with high rainfall and the oscillating relative humidity of the air during the pre-harvest stages of seed maturation may result in losses in physical RESOURCES Agriculture Labs For Seed, Soil, Plant and Disease Diagnostics Lentil Reproductive and Maturity Staging Guide Harvest Aid Herbicides for Pulses Managing Harvest Losses in Pulses and Soybeans LINKS Keeping it Clean, Maximum Residue Limits Advisory Special thanks to Saskatchewan Pulse Growers and Manitoba Pulse and Soybean Growers. With improved genetic pod shatter resistance and Apr 5, 2024 · It is frequently used for pre-seeding weed control and applied in-crop to herbicide tolerant crops, as well as pre- or post-harvest applications for crop desiccation and perennial and winter annual weed control. The pre-harvest treatments were an untreated control, glyphosate, and diquat. Jul 1, 2025 · What is Pre-Harvest Desiccation? In short: it’s a way to speed up harvesting. 5 and R7 growth stages results in the production of seeds having a similar quality but glyphosate causes phytotoxic damage to seedling roots. But it also raises the level of residue that ends up in our food. These restrictions include a prohibition of pre-harvest use as a desiccant and the need for certain measures to protect non-target organisms. [1][2][3] Crop desiccants (not to be confused with chemical desiccants) include herbicides and defoliants, used to accelerate the natural drying of plant tissues. MRLs and Pre-Harvest Desiccation With Greg Bartley Episode 12 • 4th August 2025 • Growing Pulse Crops • Pulse Crops Working Group 00:00:00 00:28:08 Research Objective To evaluate potential pre-harvest herbicide and desiccant effects on crop and seed dry-down and seed quality when straight-combining canola To provide guidelines for growers regarding potential benefits of pre-harvest herbicide/desiccant applications when straight-combining canola and make produce recommendations tailored to their specific needs and expectations Nov 16, 2023 · The European Commission stated Thursday that they are set to proceed with the renewal of the approval of glyphosate for a period of 10 years, subject to certain new conditions and restrictions. May 14, 2025 · There is also available a ready-made mixture of diquat with amicarbazone focused on pre-harvest desiccation. Apr 4, 2018 · One reason for this increasing and insidious presence of glyphosate is due to pre-harvest crop desiccation, the practice of applying the weed-killer toward the end of the growing season, to kill the crop so it will dry sooner, enabling harvesting earlier than would naturally occur. Soybeans should have at least 65% brown pods and 70% leaf drop with seed moisture of 30% or less. This is because early applications can cause losses in productivity and reduced seed vigor, while late application does not meet the desiccation objective, presenting a result that is not as significant as expected. 0 Pre-harvest herbicide and desiccation options for straight-combining canola: Effects on plant and seed dry-drown, yield and seed quality Pre-harvest management herbicides can help maximize crop yield and quality potential while controlling weeds from the season. However, producers must proceed with caution, as grain buyers may have restrictions in place. Always read and follow label directions and consult an . In 2013, we tested 12 treatments Aug 14, 2013 · Understand How & When to use Pre-Harvest Herbicide. In 2013, we tested 12 treatments applied at four Aug 20, 2020 · While applying a pre-harvest or desiccant frequently provided drydown benefits in straight-cut canola, not applying a pre-harvest herbicide or desiccant should be considered a potentially viable option, especially for early seeded, reasonably uniform and weed free fields where a hybrid with good pod shatter tolerance is being grown. A wheat plant is considered physiologically mature at 30% moisture; this means grain Desiccation Do you have questions about pre-harvest application on your pulse and flax crops? We have been getting a few calls and texts so I thought this email might be helpful. Soybean external and internal pod characteristics from beginning seed (R5) through full maturity (R8). Low grain moisture content at harvest reduces post-harvest grain drying costs and seed quality loss during storage. This process of killing the plant at the root can take up to three weeks. Field studies were conducted to determine the effects of diquat, paraquat, and ethephon applications on grain moisture, grain weight, and seed germination of hybrid rice In view of the need to clarify the most appropriate moment to perform the pre-harvest desiccation and its effects on the main physical and physiological attributes of soybean, this work had as objective to define which soybean phenological stage is adequate to promote pre-harvest desiccation and to measure the effects of this procedure on the Pre-harvest desiccation may increase the efficiency of seed production. The biggest issue Jul 1, 2022 · The application of glufosinate or diquat was effective in the pre-harvest desiccation of soybean plants, with no differences between the assessed herbicides or phenological stages. Aug 23, 2022 · Pre-harvest desiccation refers to an herbicide application that dries the plant and leaves of a crop before harvest. Field studies were conducted to determine the effects of diquat, paraquat, and ethephon applications on grain moisture, grain weight, and seed germination of hybrid rice Key Result This three-year study frequently showed benefits to using pre-harvest herbicide and desiccant options as tools to improve straight combining results. However, there are still few studies evaluating the influence of long-term management systems on the physiological quality of soybean seeds. May 25, 2010 · Features Desiccants Seed & Chemical Desiccation or preharvest weed control? When a year like 2009 rolls around, with uneven and late crop maturity, the topic of speeding up harvest also rolls around. Products with contact activity will cause faster desiccation and leaf drop of weeds but may be less effective at killing weeds compared with systemic products. Where allowed, Glyphosate can be used alone, or tank mixed with Heat to desiccate crops. indica) and conventional rice Wuyunjing 7 (Oryza sativa ssp. Farmers use glyphosate to kill the crop uniformly, which helps it dry out and ripen at the same time. Pre-harvest chemical desiccators may be applied from 7 to 15 days before an anticipated harvest date. Abstract: Pre-harvest desiccation may increase the efficiency of seed production. Pre-harvest staging is critical to avoid any herbicide residues in the grain, which can lead to Maximum Residue Limit (MRL) and marketability issues. “We’ve had some really good, hot weather for harvesting, so it really hasn’t been a year that we’ve had to talk much about pre-harvest desiccation or pre-harvest weed management,” provincial weed extension specialist Kim Aug 12, 2020 · What is the goal with a pre-harvest application? This article discusses tips and solutions for weed control versus desiccation. Pre-harvest crop desiccation is the application of an agent to a crop just before harvest to kill the leaves and/or plants so that the crop dries out from environmental conditions, or "dry-down", more quickly and evenly. In the past, harvest aids have been used to remedy problems that interfered with efficient soybean harvest e. One of the more obvious things to consider for improving flax harvestability, particularly with Oct 4, 2021 · Soybean desiccation Soybean desiccation is not a new tool in other parts of the country, it has just not been used in Illinois with any frequency. Non-crop areas: Orchards, vineyards, roadsides, and industrial sites for broad-spectrum weed control. Figure 1. There’s plenty to do before they can breathe a brief sigh of relief and begin their planning for next year’s growing season. What are the common formulations of The treatments were a factorial combination of three varieties (CDC Bethune, CDC Glas, and CDC Sorrel) and three pre-harvest herbicide/desiccation options for a total of nine treatments. ). g. The central hypothesis was that herbicide application at stages close to physiological maturity would minimize the negative impacts Aug 12, 2014 · By Brian Hall, OMAF/MRA, Stratford Green stalks, weeds and uneven ripening can all be a problem at harvest. Mar 5, 2016 · Glyphosate, the main ingredient in Monsanto's Roundup herbicide, is recognized as the world's most widely used weed killer. , green stems or excessive weeds. Pre-harvest chemical desiccation is a practice widely adopted by soybean growers worldwide. Dec 10, 2020 · Grain moisture content is a limiting factor in machine kernel harvest (Wang and Li, 2017). Apr 25, 2019 · Additionally, desiccation would be advantageous for those growers experiencing late-season stalk disease in their crop. One of the smartest decisions a grower could make is to consider a late-season harvest-aid application. However, its effectiveness and impacts may vary depending on the dosage, the phenological stage at the time of application, and environmental conditions. However, results show that going without a pre-harvest herbicide or desiccant is a potentially viable option, especially for early seeded, reasonably uniform and weed-free fields where a hybrid with good pod shatter tolerance is being Aug 28, 2025 · These results showed the benefit of drying down soybean with a desiccant are limited. What is new is that more farmers are looking to desiccation in combination with earlier planting for an Pre-harvest application of herbicides such as Roundup containing glyphosate is common for dozens of conventional food crops not just wheat. This practice is commonly used in crops like corn and soybeans; however, its adoption in bean cultivation is still low and relatively recent. Dry bean crops are ready Oct 30, 2024 · Henry Rowlands, director of The Detox Project, which carries out glyphosate testing for citizens and the food sector, agrees: “There has been a major shift in the right direction by some of the largest agricultural companies in Canada when it comes to pre-harvest spraying of glyphosate [“desiccation”]. Growers who desiccate also have more control over harvest timing, and desiccation also helps even out moisture levels before harvesting. May 20, 2025 · Desiccation is an important practice for uniformizing grain moisture and anticipating harvest. Aug 30, 2022 · A version of this article was originally written by @nozzle_guy as a guest blog for Farm At Hand, and is reproduced with permission. Aquatic environments: Management of invasive aquatic plants like water hyacinth and duckweed. When to desiccate? The main point to be observed in carrying out pre-harvest desiccation is the appropriate time for application. 9. Learn when to dessicate and various options. 3 stage being the recommended time, when the plant reaches physiological maturity. Aug 28, 2022 · Sharpen – soybeans: Apply 1 to 2 ounces per acre at least 3 days prior to harvest, or 10 days for most effective desiccation. wfzx i43yl ln5tqm elc 44ls ti kce4thv y1t3zte hbnjy qufi