Getting Prepared For Application 3.0

Spray Drift

The application of crop protection products is considered an integral and viable part of a total integrated pest management (IPM) program, provided that the application itself is made in a safe and efficient manner, maximizing pest efficacy while minimizing impact on the environment. Off-target particle drift is considered one major source of application inefficiency negatively impacting yields, and increasing unnecessary costs.

Particle drift can also have detrimental impacts on the environment. Injury to susceptible vegetation, wildlife, people and contamination of water supplies may occur. Every application is a balance between the need to control the targeted pest and the need to minimize drift.

Application 1.0 occurred when the primary focus was on controlling the targeted pest. Application 2.0 arrived when drift became an increasingly pressing issue and thus the focus of application technologies and procedures. We are now entering the period of Application 3.0, where applicators are realizing they must find a suitable balance between both application goals.

Reducing Driftable Fines

Over the last several years, there has been an increased emphasis by nozzle manufacturers to engineer spray nozzles that will effectively reduce the volume of driftable fines found in spray droplet spectrums. Many applicators have chosen to use these low-drift designs, mostly as a means to safeguard the applications that are being made from unwanted spray drift. Similarly, many applicators are utilizing drift reduction adjuvants to further lower their risk of drift.

A concern is that many applicators are using these nozzle types and adjuvants without a clear understanding of the correct operating parameters. In addition, a concern has been expressed that this increased emphasis in designing and using nozzles and adjuvants to minimize drift is compromising field efficacy for some pest control and specifically herbicide products. This issue is documented within the application industry by an increased number of performance complaints being registered.

The challenge is to understand what reasons are contributing to failures to control susceptible, hard-to-control and glyphosate-resistant weeds. A related issue is poor performance of glyphosate applications on weeds that are not resistant. While this is a different problem, both lead to the same thing: Uncontrolled weeds in fields.

One of the issues associated with poor performance of glyphosate is poor timing of application in relation to weed size. Ideally, for many weed species, glyphosate is sprayed when the weeds are three to five inches tall. Numerous factors — including wet field conditions, windy days that eliminate the ability to spray and large acreages to cover — all contribute to fields not getting sprayed when weeds are at a stage when they are more susceptible to glyphosate. The larger the weed, the more difficult it becomes to control with glyphosate.

One solution for applying glyphosate to weeds that are larger than the ideal size for spraying is to increase the rate of glyphosate used, which increases the cost of the application. However, even this strategy is failing to provide the proper level of weed control.

Looking For Pest Control

Improved pest control is commonly linked to maximizing coverage on the target. Often the spray parameters needed to improve coverage are the same ones that will result in more drift. Thus, the number one goal of applying a pest control product — maximum efficacy — is often in direct conflict with another high ranking goal, drift minimization.

It has been suggested that in order to have the best opportunity for improved pest control when using drift reducing nozzle technologies, higher than typical spray pressures should be used. With the trend over the last 15 years to encourage applications to be made at lower pressures, it now becomes hard for applicators to believe that using higher pressures will result in lower drift potential when comparing newer and older nozzle technology. Many times, drift reduction strategies are presented to applicators in a manner that seems to encourage both the use of drift reduction nozzles and lower pressures, which only increases the confusion.

In response to the above mentioned industry concerns of reduced pest control while using drift reduction nozzle designs, nozzle manufactures have recently introduced new nozzle types that, while maintaining a drift reduction theme, are providing better coverage and doing so at lower pressures. More information about how and when to use the latest equipment and nozzle technologies to apply crop protection products is paramount for achieving optimum control of undesired pests while minimizing drift.

Associated with the discussion of nozzle technology, the need for better coverage and the ever-present challenge of reducing spray drift, the application industry is moving toward the adaption of prescribing a droplet size for each separate crop protection product that will provide optimum pest control while minimizing spray drift. Future EPA label directives will require applicators to adhere closely to spray droplet standards (ASABE-572.1) during application as a means to improve efficacy while at the same time following a drift reduction technology (DRT) strategy/recommendation to minimize drift into sensitive areas. Perhaps the greatest challenge to recommending specific droplet spectrums for pesticides is the lack of research data using nozzle sizes similar to those used in real world applications.

As a part of this industry standard, nozzle manufacturers are incorporating droplet size information about the nozzles they provide for the application of pest control products in their literature, through the use of on-line nozzle calculators and, soon, with the smart phone apps. Once the label includes specifics on the required droplet size, then applicators will be required to calibrate sprayers to obtain the specified droplet size. This is a phase of calibration that very few are familiar with and will require a major education focus across the industry over the next few years.

Applicators are reminded that making an application that does not totally follow the label directives is “off-label” and could be considered a finable offense by the state agency or not eligible for a “re-spray” from the product manufacturer.

Considering Sprayers

The latest sprayer technology involves the incorporation of various electronic controls designed to improve the efficiency of the application process. GPS technology is allowing for the incorporation of various components including autosteer, automatic boom height control, automatic boom swath control and fieldmapping for prescription/variable-rate applications. There is an increased interest in nozzles designed with flexible orifices to deliver variable-rates to be used to make variable-rate applications. A flow-back control valve designed to reduce spray loss when turning off the spray boom either manually or automatically is now available.

With the majority of spray machines today equipped with electronic controllers, which adjust nozzle flow rate via pressure in response to changes in application speed in order to maintain the targeted GPA, additional concerns are present. With these conventional speed and pressure-based spray systems, as pressure changes to maintain the calibrated spray output rates, a dramatic change in the spray droplet size will occur with each adjustment. The high pressure is needed to increase the flow rate from the nozzle so that the GPA is kept constant.

For example, to double the application speed and maintain the same GPA, a four-fold pressure increase is required. Since these systems are equipped with fixed orifice nozzles, the higher speeds and pressures will result in smaller droplets with high drift potential, while slower speeds will result in lower pressures and larger droplets minimizing drift potential. At the same time, however, pest control efficacy may be sacrificed. Technologies such as pulse width modulation allow for independent control of nozzle flow rate and pressure.

Another challenge related to prescribing and attaining the best droplet spectrum for an application is the impact the pesticides themselves — and any additional adjuvants — have on the droplet spectrum. Recent testing for crop protection product applications have shown that these various products can have a considerable impact on the droplet spectrum compared to spraying only with water.

For both aerial and ground nozzles, the droplet spectrum information available to assist applicators in selecting and setting up their nozzles is based on spraying water or water and NIS. Once the pesticides and other adjuvants are added, the droplet spectrum can be changed, affecting both efficacy and drift.

In situations where products fail to control targeted pests and the application is suspected, it may be the use of a drift reduction adjuvant in combination with a drift reduction nozzle that contributes to the poor results. Research addressing this issue needs to combine both field trials to determine the efficacy of nozzle and adjuvant combinations as well as a measurement of the droplet spectrums for these combinations so that correlations between efficacy and droplet size can be determined. This will help with recommendations in the future when new products enter the market place.

In summary, many factors influence the outcome of the application of pest control products. It is critical that those involved in developing the application strategies have at their disposal the latest and most meaningful information about those factors. This is especially true as more technologies are developed and adapted. Supporting sound research relevant to modern application systems is crucial for that to occur.

The knowledge generated from this research will allow applicators to successfully adopt Application 3.0. It is very critical that all involved in the crop protection industry understand the implications of Application 3.0.

Topics:

Leave a Reply

Management Stories

Young Corn Plants
ManagementTimac Agro USA Acquires Michigan Ag Retailer
January 20, 2017
Timac Agro USA, an agriculture supply company specializing in high-efficiency plant and animal nutrition products, has acquired St. Louis,MI-based A&E Ag, Read More
Sonny Perdue
LegislationTrump Formally Picks Perdue As Agriculture Secretary
January 19, 2017
U.S. President-elect Donald Trump officially announced Sonny Perdue as his choice for secretary of agriculture on Thursday, selecting a former Read More
ManagementPresident Trump, Wisconsin Review, and a Dow-DuPont Update
January 18, 2017
Editors Paul Schrimpf and Eric Sfiligoj reflect on a new administration, a recent winter show, and crop protection company mergers. Read More
Werner Baumann, Bayer AG, and Hugh Grant, Monsanto
Industry NewsReport: Monsanto, Bayer CEOs Among Latest to Make Trump Tower Pilgrimage
January 18, 2017
The chief executive officers of German chemical giant Bayer AG and U.S. seed behemoth Monsanto, Werner Baumann and Hugh Grant, Read More
Trending Articles
AgriSync
Matt Hopkins17 Agriculture Apps That Will Help You Farm Smarter In 2017
December 9, 2016
Ag professionals are working smarter, not harder, than ever before. Smart farming technologies have enabled them to reduce costs, maximize Read More
R4023 Sprayer, John Deere
CropLife 100Ag Retail Equipment Report: The Green Party Continues
December 7, 2016
In the annual race for sales in the ag retail equipment marketplace, the color schemes for participants are a little Read More
Mike Stern
Precision AgClimate Corp. CEO Talks Retailer Support For Digital Ag
December 1, 2016
CropLife Magazine’s sister publication, AgriBusiness Global, recently sat down with Mike Stern, CEO of The Climate Corp., following the Monsanto subsidiary’s Read More
Precision AgTrimble Debuts End-to-End FMIS Platform
November 28, 2016
October’s inaugural PrecisionAg Vision Conference left this author with many thoughts and things to ponder in the coming months. Probably Read More
CHS Primeland
CropLife 100The 2016 CropLife 100 Report: Reviewing The Many Bulls And Bears Impacting This Year’s Marketplace
November 28, 2016
For virtually all of 2016, the nation was wholly focused on the big Presidential election. Some folks aligned themselves with Read More
Monsanto sign
Crop InputsMissouri Governor Meets With Bayer CEO To Discuss Monsanto Merger
November 21, 2016
Missouri Gov. Jay Nixon visited Bayer AG global headquarters in Leverkusen, Germany, on November 18 to discuss the proposed Bayer-Monsanto Read More
Latest News
Eric SfiligojNo Alternative Facts: Dicamba Cropping System Applicato…
January 23, 2017
During President Donald Trump’s inauguration, much fuss was made over the use of the term “alternative facts” vs. some of Read More
Young Corn Plants
ManagementTimac Agro USA Acquires Michigan Ag Retailer
January 20, 2017
Timac Agro USA, an agriculture supply company specializing in high-efficiency plant and animal nutrition products, has acquired St. Louis,MI-based A&E Ag, Read More
Soybean field
Crop InputsNufarm Teams Up With John Deere Financial
January 19, 2017
Nufarm and John Deere Financial have teamed up to help farmers grow a better tomorrow. This program helps make purchases Read More
Sonny Perdue
LegislationTrump Formally Picks Perdue As Agriculture Secretary
January 19, 2017
U.S. President-elect Donald Trump officially announced Sonny Perdue as his choice for secretary of agriculture on Thursday, selecting a former Read More
ManagementPresident Trump, Wisconsin Review, and a Dow-DuPont Upd…
January 18, 2017
Editors Paul Schrimpf and Eric Sfiligoj reflect on a new administration, a recent winter show, and crop protection company mergers. Read More
Industry NewsBayer, MS Technologies Get China Approval For Balance G…
January 18, 2017
MS Technologies and Bayer have received import approval from China for Balance GT soybeans. The new Balance GT Soybean Performance Read More
Werner Baumann, Bayer AG, and Hugh Grant, Monsanto
Industry NewsReport: Monsanto, Bayer CEOs Among Latest to Make Trump…
January 18, 2017
The chief executive officers of German chemical giant Bayer AG and U.S. seed behemoth Monsanto, Werner Baumann and Hugh Grant, Read More
Giant Ragweed
HerbicidesStudy: Focusing On Weed Seedbank Can Help Manage Herbic…
January 18, 2017
Researchers writing in the latest issue of the journal Weed Science provide important insights on the control of herbicide-resistant giant Read More
Management3 Financial Trends To Watch In Agriculture
January 17, 2017
I recently had the opportunity to attend a meeting of credit managers for Midwest ag supply and input companies, in part Read More
Andersons Retail Store
CropLife 100The Andersons To Close All Retail Stores; Shutdown Does…
January 16, 2017
In a stunning announcement to the Toledo area, The Andersons Inc. said on Sunday that it would close its two Read More
Trimble TMX-2050 In-Cab Display
Eric SfiligojPrecision To Lead Agriculture In 2017?
January 16, 2017
Another new year is upon us! And I’m certain I speak for many in the agricultural world when I say Read More
Corn
Eric SfiligojThe Mood From Madison? In A Holding Pattern
January 16, 2017
Last week, I had the chance to attend the annual Wisconsin AgriBusiness Classic show in Madison, WI. It’s been a Read More
Syngenta Sign
Crop InputsAccenture Helps Syngenta Transform Its Global Logistics
January 13, 2017
Syngenta, a leading agriculture company, has collaborated with Accenture to design and implement a new digital logistics operating model across Read More
Fall Creek Seth Harden The Nature Conservancy
StewardshipLocal Farmers’ Watershed Initiative: Continuous Improve…
January 13, 2017
The goal in the Big Pine Watershed Project is to more intentionally do what local farmers and responsible ag retailers Read More
HerbicidesEPA Expands Enlist Duo Herbicide Registration To 34 Sta…
January 13, 2017
The U.S. EPA has expanded the geography for application of Enlist Duo herbicide from 15 to 34 states. This means Read More
Olson Ag Enterprise
CropLife 100Wilbur-Ellis Acquires Nebraska Seed Retailer
January 13, 2017
Wilbur-Ellis’ Agribusiness, a recognized leader in precision agriculture technology and the distribution and marketing of plant protection, seed and nutritional Read More
ManagementDeere-Precision Planting Update and the Ag Secretary Wa…
January 12, 2017
Editors Paul Schrimpf and Eric Sfiligoj provide the latest on the court date for John Deere/Precision Planting and the quest Read More
Monsanto sign
Seed/BiotechMonsanto, NRGene Form Agreement For Big Data Genomic An…
January 12, 2017
Monsanto Co. and NRGene have announced that the companies have reached a non-exclusive, multi-year global licensing agreement on NRGene’s genome-analysis Read More