6 Ways To Reduce Herbicide Spray Drift

Growers need to take precautions to reduce off-target drift when applying herbicides this spring, said Purdue Extension weed scientist Bill Johnson.

“Drift reduces product efficacy on the intended target and can result in damage to sensitive plants,” he said. “It also can deposit illegal residues on edible crops, especially organic or processed crops that are checked for contaminants.”

There are two types of herbicide drift — vapor and particle. With vapor drift, the application reaches its target but at some point moves off-target after application. With particle drift, the portion that moves off-target never reaches is target.

Particle drift can occur with any pesticide application, regardless of product formulation, and is directly associated with droplet size, sprayer boom height and wind speed.

“Injury symptoms from drift will depend on the product used, environmental conditions and sensitivity of the plants in the path of air flow,” Johnson said. “Low concentrations of glyphosate may or may not show injury symptoms, while low concentrations of 2,4-D or dicamba may show major symptoms on sensitive plants such as tomatoes, grapes, and roses.”

Here are six common ways to reduce particle drift, according to Johnson:

  1. Use the lower end of the recommended pressure range for a particular nozzle to produce course droplets.
  2. Lower the boom height but ensure the spray pattern is maintained.
  3. Rather than increasing pressure to provide higher outputs, increase the nozzle size to increase the spray volume per acre while keeping within the recommended pressure.
  4. Spray when wind speeds are below 10 miles per hour. Some herbicide labels specifically state that applications should not be made when wind speeds exceed 10 mph.
  5. Spray when the wind direction is away from sensitive areas.
  6. If possible, use a drift control agent.

Vapor drift presents a bigger challenge to crop farmers.

“Vapor drift is much harder to control than particle drift,” Johnson said. “Vapor drift is a function of the herbicide formulation and ambient temperature.”

Temperature and weather conditions favorable for long-distance vapor drift most commonly occur from mid-April to mid-May but can continue into June and July.

“Long distance movement usually occurs at night when the temperature is cool and there is light air movement,” Johnson said. “When such days occur, being aware of a volatile herbicide’s ability to vaporize can help applicators manage potential drift problems by either not spraying until conditions improve or by choosing a formulation of the product that is less subject to volatilization.”

(Source: Ag Answers)

Topics:

Leave a Reply

Nozzles Stories

Nozzles18 Spray Nozzles That Reduce Drift, Optimize Coverage
May 7, 2014
This year’s line-up of tips feature the versatility to handle any spray job. View photos and product descriptions of the latest nozzles on the market in our slideshow. Read More
NozzlesChanging Crop Protection Landscape Demands Drift Advances
May 1, 2014
New weed control systems and growing public pressure mean technologies to minimize drift can’t come fast enough. Read More
NozzlesGreenleaf Launches Free NozzleCalc App
January 16, 2014
Quickly calculate sprayer settings for TurboDrop and AirMix nozzles anywhere with the new Greenleaf Technologies Nozzle Calculator app. Read More
NozzlesTeeJet Technologies Launches New Droplet Size Monitor, Guidance System
July 24, 2013
TeeJet has unveiled two new products: the Sentry 6120 Droplet Size Monitor, which helps operators improve spray applications, and the Matrix Pro GS guidance system with enhanced swath control. Read More

Trending Articles

Crop InputsPlatform Specialty Products To Acquire Arysta LifeScience
October 20, 2014
Once the acquisition is complete, Platform Specialty Products will combine Arysta LifeScience with previously acquired companies Agriphar and Chemtura Crop Solutions. Read More
Seed/BiotechMonsanto Offers New Support For Ferguson, Area Communities
October 8, 2014
Monsanto Co. has committed $1 million in new support for several collaborative efforts in Ferguson, MO, and surrounding communities in North St. Louis County. Read More
Seed/BiotechUnapproved Genetically Modified Wheat Found In Montana
October 3, 2014
USDA reports that one year after discovery of Monsanto's unapproved wheat in a single Oregon field disrupted U.S. wheat export sales, the GMO wheat has again been found in Montana. Read More
Equipment2014 Product Of The Year Voting
September 19, 2014
The deadline to vote for the 2014 CropLife IRON Product of the Year is October 31. Please cast your vote today to help us determine the winner. Read More
FertilizerFall Fertility 2014: Forecasting Fertilizer Use
September 7, 2014
Great crops this year have tapped the soil, and fall work is definitely called for, but how challenging will that get? Read More
CropLife 100CHS To Build $3 Billion Fertilizer Plant In North Dakota
September 5, 2014
The fertilizer plant in Spiritwood will be the single largest investment in CHS history, as well as the single largest private investment project ever undertaken in North Dakota. Read More

Latest News

InsecticidesValent U.S.A., MGK Form Marketing Agreement
October 24, 2014
Valent has formed an agreement with Minneapolis-based MGK to manage the marketing and sales of MGK’s crop protection line of insect control products within the U.S. beginning April 1, 2015. Read More
StewardshipFlorida’s 4R Advocate Keeps Improving
October 24, 2014
Florida farmer Alan Jones uses the 4R principles of nutrient stewardship as the core of his fertility program, which allows him to maximize production and keep costs in check. Read More
Seed/BiotechMonsanto Named One Of The World’s Best Multinational …
October 23, 2014
Monsanto ranked No. 8 in the world’s largest annual study of workplace excellence that identifies the top 25 best multinational companies in terms of workplace culture. Read More
Crop InputsArysta Hires Former Agri-Chem, CPS Employee For Delta S…
October 23, 2014
New Territory Sales Manager Mark Peel’s primary role will focus on working with growers regarding fungicides in Louisiana, Mississippi, Arkansas and Tennessee. Read More
CropLife 100GROWMARK Announces Appointments In Plant Food Division
October 22, 2014
GROWMARK, Inc. has announced the three key staff changes in its Plant Food Division. Read More
CropLife 100GROWMARK Appoints New VP Of Finance And Risk Management
October 22, 2014
Wade Mittelstadt has been named GROWMARK Vice President, Financial and Risk Mangement, effective December 1, 2014. Read More
FungicidesEPA Approves BASF In-Furrow Corn Fungicide
October 22, 2014
Field trials show Xanthion In-furrow fungicide provides more rapid emergence, extended residual control and improved seedling health than untreated crops. Read More
EquipmentAgraScout App Available At No Cost To Universities
October 21, 2014
AgraScout, a fast and easy to use mobile crop scouting app, is now available at no cost to University students, Read More
LegislationNew Farm Bill Program To Provide Relief To Farmers Affe…
October 21, 2014
The USDA has implemented a new Farm Bill initiative that will provide relief to farmers affected by severe weather, including drought. Read More
ManagementGreenfield Scholars Program Aims To Sustain Agronomy Wo…
October 21, 2014
The program encourages talented students to study agronomy, crop and soil sciences while cultivating networks to develop the necessary workforce to sustain the profession. Read More
Paul SchrimpfPrecision Ag: Taking It To The Hill
October 21, 2014
A new coalition took the good news message of precision agriculture to Washington, DC, last month. Read More
ManagementUSDA Awards $18 Million In Small Business Research Gran…
October 21, 2014
The grants will provide high quality, advanced research and development that will lead to technological innovations and solutions for American agriculture. Read More
FertilizerCF Industries Terminates Merger Discussions With Yara I…
October 21, 2014
CF Industries Holdings and Yara International have terminated their discussions regarding a potential merger of equals transaction. Read More
Seed/BiotechSyngenta Ranked A Top 10 Biotech Employer For Third tim…
October 20, 2014
Syngenta ranked in the top 10 among the world’s top biotech employers, according to an annual survey conducted by Science magazine. Read More
CropLife 100Wheat Growers Break Ground For New Facility At Kennebec
October 20, 2014
Wheat Growers has broke ground for a state-of-the-art shuttle loader grain handling, fertilizer and agronomy facility in Kennebec, SD. Read More
FertilizerVerdesian Life Sciences Signs Agreement With Los Alamos…
October 20, 2014
Verdesian Life Sciences has signed a licensing agreement with Los Alamos National Laboratory to develop and market LANL’s latest nitrogen enhancement technology for plants. Read More
MicronutrientsStoller Group Announces Groundbreaking At New Office Bu…
October 20, 2014
Jerry Stoller, founder and president of Stoller Group, announced the groundbreaking at the site of the company’s future headquarters in Read More
Crop InputsBioSafe Systems Opens New Production Facility In Nevada
October 20, 2014
BioSafe Systems has completed construction of a state-of-art production facility in Sparks, NV, for its line of activated peroxygen products. Read More