Dealing With Drift

Increasing efficacy. Minimizing drift. Maximizing productivity. These are by-products of an accurate and efficient spray application program. They are also a major focus of CropLife Media Group’s two-part Webinar series “Dealing With Drift,” featuring Robert Wolf, professor of biological and agriculture engineering at Kansas State University and an expert on drift.

Wolf discussed nozzle technology and calibration (Part 1) and equipment and adjuvants (Part 2) in his two presentations. Attendees were awarded CCA CEU credits for the Webinars, which were sponsored by Greenleaf Technologies (TurboDrop), AGCO‘s RoGator, and BASF‘s Status herbicide.

Nozzle Technology And Calibration

In “Dealing With Drift: Nozzle Technology And Calibration” (Part 1), Wolf presented an overview of nozzle designs past and present, and issues related to efficacy and drift control.

“Many technological changes have occurred in the spray industry in recent years,” Wolf said. “Much attention has been given to application equipment to increase efficiency and minimize spray drift. This presentation is designed to highlight some of these application technologies in ground application.”

Nozzles are important because they control the amount (GPA), determine the uniformity of application, affect the coverage, and influence the drift potential, according to Wolf.

“Today’s nozzles are being designed to reduce drift, with greater emphasis on improved drop size control and spray quality,” he said. However, he reminded applicators must keep in mind the number one goal is to control the undesired pest. While doing so, they must minimize drift.

Wolf compared several nozzle types available on the market today, from the extended range to the air-induced/Venturi design, and examined their droplet size, spray distribution, and pressure range.

“Beginning with the ‘extended range’ flat fan nozzle (all major manufactures have one), continuing with the design of ‘preorifice inserts’ and ‘turbulation chambers’, and now with the ‘Venturi’ style nozzle design, manufacturers have worked to develop nozzles that are improving the quality of spray emitted,” Wolf said.

Wolf also addressed the role of Standard ASABE S-572.1 — Spray Nozzle Classification by Droplet Spectra — and how applicators need to calibrate for a label-specified droplet size in the future.

“Calibration for droplet size is the next phase for applicators,” he said. “Ensuring that the spray droplet spectrum is what it is supposed to be to maximize efficacy while minimizing drift.”

Equipment And Adjuvants

In “Dealing With Drift: Equipment And Adjuvants” (Part 2), Wolf emphasized the importance of canopy penetration, as well as how application strategies may vary by crop protection product (e.g., herbicides vs. fungicides vs. insecticides). He also provided a comprehensive review of spray equipment technologies that impact efficacy and drift control, including air-assist and pulse width modulation.

“Air-assist sprayers are popular for applications of fungicides and insecticides in heavy crop canopies,” he said. ” A curtain of high speed air is used to assist with particle movement after leaving the nozzle. In some designs, the spray and air are combined prior to exiting the boom, while in others a shield of air is directed parallel or into the spray stream.”

Wolf also explained the use of pulse width modulation, which allows operators to control pressure independent of speed or rate.

“Using high-speed solenoid valves to regulate flow, pulse width modulation allows you to retain both a set rate and a set pressure whenever a speed change requires a change in the liquid flow,” Wolf said.

The influence of tank mix solutions on flow rate and droplet spectra was also covered in the Webinar.

“What we’re finding is droplet spectra is affected by certain products,” Wolf said. “The need to evaluate droplets of solutions is starting to be accomplished at various labs across the country.”

Operators should be open minded to the adoption of drift reduction additives (e.g., adjuvants), especially if used with other drift control strategies, Wolf said.

“Initially, many people thought the addition of drift control additives alone would be the cure all. But that hasn’t been the case,” he said. “Still, technological advancements are occurring that are showing promise with these products in reducing drift.”

Finally, Wolf offered a long list of strategies for reducing drift, including using lower pressures, avoiding high application speeds, and considering buffer zones.

Topics:

Leave a Reply

Adjuvants Stories
AdjuvantsAdjuvants 2014: Who Needs Good Crop Prices?
March 3, 2014
Apparently not the adjuvants market as new herbicide technologies and other influences have manufacturers ramping up production in anticipation of another splendid season for adjuvant adoption. Read More
AdjuvantsNew Adjuvants Report Forecasts A Growing Market
November 1, 2013
The global agriculture adjuvant market valued at around $2 million in 2012 is expected to to reach nearly $3 million by 2018. Read More
AdjuvantsAdjuvants: Activating Yields
March 1, 2013
Manufacturers are ramping up production of specialty adjuvants as the tank mix takes center stage in the weed resistance fight. Read More
Top 100 Articles
CropLife 100Pinnacle Agriculture Acquires Minnesota Retailer
April 14, 2015
Pinnacle Agriculture Holdings, LLC, ranked No. 6 on the CropLife 100,  has successfully acquired Liebl Ag, LLC in Ada, MN.  Read More
CropLife 100CHS, Aurora Cooperative Complete Fertilizer Storage, Grain Shuttle Loading Facility
April 13, 2015
CHS Inc., the nation’s leading cooperative and ranked No. 5 on the CropLife 100, and Aurora Cooperative (ranked No. 21) Read More
CropLife 100GROWMARK Acquires Missouri Refined Fuels Terminal
April 2, 2015
Bloomington, IL-based GROWMARK and Magellan Pipeline Co. have entered into an agreement in which GROWMARK will acquire the refined fuels Read More
CropLife 100Wilbur-Ellis Acquires South Dakota Retailer
April 2, 2015
Wilbur-Ellis Co.’s Agribusiness Division, a recognized leader in precision agriculture technology and the distribution and marketing of plant protection, seed Read More
CropLife 100The McGregor Co. Closes Smith-Kem Acquisition
April 2, 2015
The McGregor Co. — ranked No. 16 on the CropLife 100 list of largest U.S. ag retailers — has completed Read More
CropLife 100BRANDT Commemorates National Ag Day
March 20, 2015
The Illinois agriculture community gathered at BRANDT global headquarters on March 18 to celebrate National Ag Day behind this year's theme Sustaining Future Generations. Read More
Latest News
FungicidesBRANDT Adds Zonix Biofungicide To Portfolio
April 21, 2015
BRANDT has added Zonix biofungicide to its rapidly expanding line of organic and sustainable products. Zonix is a contact fungicide that Read More
ManagementMissouri Experts: Spring Planting Slow Start Won’…
April 20, 2015
In the first of the agronomy teleconferences with Extension specialists, University of Missouri Extension climatologist Pat Guinan said the slow Read More
Carl Casale of CHS
Industry NewsCooperative CHS Reports Net Income Of $471.5 Million Fo…
April 20, 2015
CHS Inc., the nation’s leading farmer-owned cooperative and a global energy, grains and foods company, has announced company net income Read More
Industry NewsCHS Insurance Names New Director Of Sales
April 17, 2015
Bryan Lewis has been named director of sales for CHS Insurance, the nation’s largest agribusiness insurance broker and full-service insurance Read More
Mature Waterhemp in Corn
HerbicidesGenetic Literacy Project: There’s No Such Thing A…
April 17, 2015
Read the latest “analysis” on GMOs from Consumer Reports and you’ll “learn” that glyphosate, the chemical developed by Monsanto (its Read More
HerbicidesNew Resistance To 2,4-D Discovered In Australia
April 17, 2015
In a world-first case of herbicide resistance, researchers have confirmed that sowthistle weed in the south east of South Australia Read More
ManagementNews From RTP Company Visits and Growers Buying Older S…
April 16, 2015
Paul Schrimpf and Eric Sfiligoj discuss recent trips to the Research Triangle Park area and market seed sales trends. Read More
soybean field
StewardshipNew ASABE Standard Establishes Framework For Sustainabl…
April 16, 2015
The American Society of Agricultural and Biological Engineers (ASABE) has initiated a project to develop a new standard to establish Read More
MicronutrientsSouthern States: An Inside Look At Our Tissue Sampling …
April 15, 2015
Remember learning about the food pyramid in school? The nutritional diagram recommends the proper amount of nutrients you need on Read More
Industry NewsArysta Adds New U.S. Fungicides Marketing Manager
April 15, 2015
Arysta LifeScience North America recently hired Deneen Sebastian as its Marketing Manager for U.S. Row Crops, Fungicides. Most recently, Sebastian Read More
FungicidesVerdesian Launches Phosphite-Based Cereal Fungicide
April 14, 2015
A new, phosphite-based fungicide designed for improved suppression of deoxynivalenol (DON) in wheat and barley infected by Fusarium head blight Read More
Mature Waterhemp in Corn
HerbicidesSURVEY: Close To 90% Of Growers Battle Weed Resistance
April 14, 2015
Herbicide resistance management continues to be a priority for corn and soybean growers, and they’re working together more effectively to Read More
CropLife 100Pinnacle Agriculture Acquires Minnesota Retailer
April 14, 2015
Pinnacle Agriculture Holdings, LLC, ranked No. 6 on the CropLife 100,  has successfully acquired Liebl Ag, LLC in Ada, MN.  Read More
StewardshipFMC Corp. Joins Sustainable Agriculture Alliance
April 14, 2015
FMC Corp. has joined Field to Market: The Alliance for Sustainable Agriculture, a multi-stakeholder initiative working to define, measure and Read More
Industry NewsArysta Adds Two To Goëmar Sales Team
April 14, 2015
Arysta LifeScience North America recently announced two new additions to the Goëmar sales team: Steve Kelly, Technical Service Manager – Read More
Valley Variable Rate Irrigation
Precision AgVariable Rate Irrigation Gains Followers
April 14, 2015
Irrigation systems have had the ability to apply different amounts of water throughout a field for decades, using timers that Read More
CropLife 100CHS, Aurora Cooperative Complete Fertilizer Storage, Gr…
April 13, 2015
CHS Inc., the nation’s leading cooperative and ranked No. 5 on the CropLife 100, and Aurora Cooperative (ranked No. 21) Read More
Soybean field
Industry NewsThree Ag Co-ops Poised For Possible Merger
April 13, 2015
Following months of study and preparations, the Board of Directors for United Farmers Coop (UFC), Farmers Elevator Cooperative (FEC) and Read More