What’s the difference between Roundup and Roundup For Lawns?

Source: Kevin Frank, and Aaron Hathaway, Michigan State University Extension

These two different products are good examples of why understanding the difference between product names and herbicide active ingredients is critical.

The spring blitz of lawn care ads is in full swing as northerners emerge from their long winter slumber and begin to venture outside into the lawn. This year, a new product called Roundup For Lawns is gathering attention and has already generated questions from those wondering why they’d spray Roundup on their lawn—wouldn’t it kill the lawn?

The confusion originates from the name Roundup itself and that for most consumers, they don’t recognize Roundup is a product name such as Coke or Tylenol.

It turns out there is a lot in a name!

Roundup: The herbicide active ingredient in Roundup is glyphosate, which if sprayed on the lawn will kill not only the weeds but the lawn. This is a nonselective herbicide that controls any green plant on which it is applied.

Roundup For Lawns: The new Roundup For Lawns does not contain glyphosate. The herbicide active ingredients in Roundup For Lawns are MCPA, quinclorac, dicamba and sulfentrazone. These herbicides are effective on a broad range of weeds that might infest the lawn such as dandelion, crabgrass and nutsedge. When used properly it will not kill the desirable turfgrasses in the lawn. This is a selective herbicide that controls specific weeds, but not lawn grasses.

This is a good lesson in recognizing that product name is not the important information when selecting a herbicide—it’s the active ingredients that matter.

Reference to commercial products or trade names does not imply endorsement by Michigan State University Extension or bias against those not mentioned.

Calibration for Rate Controlled Sprayers

Source: Erdal Ozkan, OSU Extension

I had an article in last week’s CORN newsletter encouraging growers to fine tune and calibrate their sprayers. I had mentioned that the next couple of weeks may be the last best time period to do this since planting season is just about to start. There would not be any better time to do this than now. The next day I got an email from a grower asking me this question that I get often: “I have a rate controller in the cab that regulates the flow rate of the sprayer regardless of the changes in sprayer ground speed. So, should I still calibrate the sprayer to find out the application rate?”. The answer is, Yes, you should. Although the rate controllers do an excellent job with regulating the flow rate of nozzles to keep the application rate constant, a manual calibration at least once a year is needed to ensure the rate controller is functioning properly.

Here is why we should confirm the accuracy of rate controllers: Unfortunately, electronic controllers usually cannot detect flow rate changes on each nozzle on the boom, and none can detect changes in spray pattern. If a nozzle is plugged, or extremely worn out, the rate controller cannot tell us this is happening. It will still try to maintain the constant application rate by changing the system pressure and force other nozzles to spray less or more to overcome the problem in one or several nozzles. If the ground speed sensor works based on revolutions of the tractor wheels, the ground speed determined may not be accurate, because of the slippage that may occur under some ground conditions. Even the tire pressure being off just a few psi may change the tire revolutions per minute leading to erroneous travel speed readings. Finally, Controllers don’t show changes in spray patterns that may happen when a nozzle is defective, plugged, or worn-out. So, we will have to continue manually checking the flow rate of the nozzles, and visually observing the changes in spray patterns until the technology is developed to do these observations remotely, and on-the-go.

As I mentioned in the article in last week’s CORN newsletter, it usually doesn’t take more than 30 minutes to calibrate a sprayer, and only three things are needed: a watch or smart phone to record the time when measuring the nozzle flow rate or the travel speed, a measuring tape, and a jar graduated in ounces. Please take a look at the Ohio State University Extension publication FABE-520 for an easy method to calibrate a boom-type sprayer.  Here is the URL for this publication: http:// ohioline.osu.edu/factsheet/fabe-520  

Not knowing limitations of rate controllers may create serious problems. I already mentioned how smoothly the rate controllers keep the application rate the same regardless of changes in travel speed. However, this convenience comes at a cost if the controller is forced to make drastic changes in the application rate as a result of too high or too low of a travel speed. As you know, to achieve best results from pesticides, the application rate, as well as the droplet size must remain relatively unchanged during the entire spraying. When sprayer speed goes up, to maintain the pre-set application rate, the controller requires the system pressure to go up to increase the nozzle flow rate. This, unfortunately results in more drift-prone droplets coming out of the nozzle, especially if the nozzle used is designed for low application rates within the recommended pressure ranges. Conversely, when the sprayer slows down, the opposite happens: the controller forces the system to lower the pressure, in order to reduce flow rate of nozzles. This will result in production of larger than the desired size of droplets, leading to inadequate coverage. If you are spraying Dicamba or 2,4-D herbicides, you need to pay even more attention to operation of rate controllers. As you know, only a small number of nozzles at specific ranges of pressure can be used to spray these products. Significant changes in ground speed may force the rate controller to make significant changes in spray pressure that may be outside the allowable legal pressure range required to spray these herbicides. Without you realizing it, you may find yourself in violation of the label. Make sure the nozzle size selected will allow the controllers to make necessary changes in the flow rates while still staying within a safe, applicable and allowable pressure range.

Time is now to purchase the right nozzles for your spraying needs

Source: Erdal Ozkan, OSU Extension

This is the time of the year you must complete shopping for nozzles because the spraying season is just around the corner. Each part of the application equipment plays a critical role in achieving maximum performance from the sprayer. Therefore, each component must be selected carefully and must perform successfully the tasks associated with it. Although nozzles are some of the least expensive components of a sprayer, they hold a high value in their ability to influence sprayer performance. They help determine the gallon per acre intended application rate. They also influence the droplet size, which plays a significant role in achieving improved penetration into crop canopy and better coverage on the target pest, both affect the efficacy we expect from pesticides applied. Wrong choice of nozzle may hurt us in several ways, but here are the three most obvious ones: We may end up with streaks of untreated areas causing non-uniform pest control; or simply complete failure or ineffective pest control which require repeat applications; and finally, we may end up losing a significant part of the pesticides applied in the form of spray drift. Sometimes, the choice of nozzle may be determined by the requirements given on the pesticide label.

Selecting the best nozzle requires careful consideration of many important factors including: sprayer operation parameters (such as application rate, spray pressure, travel speed); type of chemical sprayed (herbicides, insecticides, fungicides); mode of action of chemicals (systemic, contact); application type (broadcast, band, directed, air assisted); target crop (field crops, vegetables, vineyard, shrubs and trees, etc.); and spray drift risk. I will briefly cover some of these topics in this article. For detailed information on nozzle selection, I strongly recommend you read a new Ohio State University Extension Publication, entitled “Selecting the Best Nozzle for the Job”. In this publication, you will see step-by-step guidelines for selecting the most appropriate spray nozzle for a given application situation. The publication is available online at following web site: http://ohioline.osu.edu/factsheet/fabe-528

Which nozzle type is best for your situation? Continue reading

New Private Pesticide Applicator Virtual Training

Source: Mark Badertscher, OSU Extension

Join OSU Extension for a virtual New Private Pesticide Applicator Training to help new pesticide applicators prepare for the Ohio Private Pesticide Applicator License scheduled for Tuesday, January 26 from 12:30-4:30 pm. The class will provide instruction in CORE, Grain, and Cereal Crops. For further study and to prepare for the test, books can be purchased from OSU Extension Publications online and shipped to your house at your expense.

Optional books for the online participants include:

Applying Pesticides Correctly (Core Manual)
https://extensionpubs.osu.edu/applying-pesticides-correctly-core-manual/

Ohio Pesticide Applicator Training: Core Student Workbook
https://extensionpubs.osu.edu/ohio-pesticide-applicator-training-core-student-workbook/

Ohio Pesticide Applicator Training: Field Crops Student Workbook
https://extensionpubs.osu.edu/ohio-pesticide-applicator-training-field-crops-student-workbook/

Register for this virtual event at https://go.osu.edu/virtualnewpesticideapplicatortraining-january26 and you will be sent a link for the class. There is no cost to participate and those who are unable to participate on the scheduled webinar date will be sent an email to watch the recording later if they register for the class. Following the class, participants can schedule an exam time at https://pested.osu.edu/PrivateApplicator/testing when they are ready to take the tests.

OHIO DEPARTMENT OF AGRICULTURE PARTNERS WITH OSU EXTENSION TO PROVIDE ONLINE PESTICIDE RECERTIFICATION OPPORTUNITIES

The temporary online trainings during the COVID-19 Pandemic allow applicators and fertilizer certificate holders to meet their continuing education requirements.

REYNOLDSBURG, Ohio (June 29, 2020) – During the COVID-19 Pandemic, the Ohio Department of Agriculture (ODA), is partnering with the Ohio State University Extension Pesticide Safety Education Program (PSEP) to temporarily provide online recertification for pesticide applicators and fertilizer certificate holders whose licenses expired in spring of 2020. The online recertification will be available Monday, July 6. For commercial applicators, it will be available August 10. For more information or to register for the online recertification, visit pested.osu.edu/onlinerecert.

The online option allows private applicators and fertilizer certificate holders due for training by March 31, 2020 and commercial applicators due for training by September 30, 2020 to meet their continuing education requirements. The cost for online training is $35 for private applicators and $10 for fertilizer certification. The price per credit hour for commercial applicators is $15. If you don’t know your license number, please call ODA at 614-728-6987, choose option 1.

Applicators are still required to meet their recertification requirements to renew licenses and certifications. As a result of HB 197, applicators have until 90 days after the emergency is over or December 1, whichever comes first, to complete their requirements. Recertification status can be checked online at https://agri.ohio.gov/wps/portal/gov/oda/divisions/plant-health/pesticides/recert-search. Applicators must also submit a completed renewal application and pay an additional fee to the ODA for licensure.

For additional information regarding online recertification, please contact the Ohio Department of Agriculture at 614-728-6987, and press 1 for licensing recertification or the OSU Pesticide Safety Education Program at 614-292-4070.

Commercial applicators must earn at least five recertification credit hours every three years, and private applicators must earn at least three recertification credit hours every three years. One hour (60 minutes) must be earned by taking one or more core education classes, one half-hour (30 minutes) of education in each category on the license, and the remaining time requirement can be met by attending classes in any category.

ODA Statement on Dicamba – Official Statement Regarding the Use of Over-the-Top Dicamba Products

Source: C.O.R.N. Newsletter

Official Statement Regarding the Use of Over-the-Top Dicamba Products

 

 

On June 3, 2020, the U.S. Court of Appeals for the Ninth Circuit rendered a decision which vacated the federal registrations of three of the four dicamba products that had previously been approved for use on dicamba-tolerant (DT) soybeans. This decision has caused tremendous uncertainty for soybean producers and pesticide dealers during an agronomically critical time of year.  It is estimated that around 40 to 50 percent of the soybean crop planted in Ohio are dicamba tolerant varieties. The specific products impacted are:  XtendiMax with VaporGrip Technology, Engenia Herbicide, and DuPont FeXapan with VaporGrip Technology. Tavium plus VaporGrip Technology for use on DT soybeans was not covered by this ruling.

In response to the decision, on June 8, 2020, the United States Environmental Protection Agency (US EPA) issued a Final Cancellation Order that outlines specific circumstances under which existing stocks of the three affected dicamba products can be used. The registration of these products in Ohio expires on June 30, 2020.  After careful evaluation of the court’s ruling, US EPA’s Final Cancellation Order, and the Ohio Revised Code and Administrative Code, as of July 1, 2020 these products will no longer be registered or available for use in Ohio unless otherwise ordered by the courts.

While use of already purchased product is permitted in Ohio until June 30, 2020, the Court’s decision and US EPA’s order makes further distribution or sale illegal, except for ensuring proper disposal or return to the registrant. Application of existing stocks inconsistent with the previously approved labeling accompanying the product is prohibited.  If you have questions about returning unused products, please reach out to your pesticide dealer’s representative.

For additional questions, please email pesticides@agri.ohio.gov or call 614-728-6394, and visit ODA’s website for updates.

Dicamba takes another blow: Court of Appeals vacates dicamba registration

Source: Peggy Hall, OSU Extension

Dicamba has had its share of legal challenges, and a decision issued yesterday dealt yet another blow when the Ninth Circuit Court of Appeals  vacated the product’s registration with the U.S. EPA.  In doing so, the court held that the EPA’s approval of the registration violated the provisions of the Federal Insecticide, Fungicide, and Rodenticide Act (“FIFRA”), which regulates the use of herbicides and other chemicals in the U.S.  Here’s a summary of how the court reached its decision and a few thoughts on the uncertainty that follows the opinion.

What now?

The court raised the issue we’re all wondering about now:  can growers still use the dicamba products they’ve purchased?  Unfortunately, we don’t have an immediate answer to the question, because it depends largely upon how the EPA responds to the ruling.  We do know that:

  • FIFRA § 136a prohibits a person from distributing or selling any pesticide that is not registered.
  • FIFRA § 136d allows the EPA to permit continued sale and use of existing stocks of a pesticide whose registration is suspended or canceled.  The EPA utilized this authority in 2015 after the Ninth Circuit Court of Appeals vacated  the EPA’s registration of sulfoxaflor after determining that the registration was not supported by substantial evidence.  In that case, the EPA allowed continued use of the existing stocks of sulfoxaflor held by end-users provided that the users followed label restrictions.  Whether the agency would find similarly in regards to existing stocks of dicamba is somewhat unlikely given the court’s opinion, but remains to be seen.  The EPA’s 2015 sulfoxaflor cancellation order is here.
  • While the U.S. EPA registers pesticides for use and sale in the U.S., the product must also be registered within a state in order to be sold and used within the state.  The Ohio Department of Agriculture oversees pesticide registrations within Ohio, and also regulates the use of registered pesticides.
  • If the EPA appeals the Ninth Circuit’s decision to the U.S. Supreme Court, the agency would likely include a request for a “stay” that would delay enforcement of the court’s Order.
  • Bayer strongly disagrees with the decision but has paused its sale, distribution and use of XtendiMax while assessing its next step and awaiting EPA direction.  The company states that it will “work quickly to minimize any impact on our customers this season.”  Bayer also notes that it is already working to obtain a new registration for XtendiMax for the 2021 season and beyond, and hopes to obtain the registration by this fall.  See Bayer’s information here.
  • BASF also states that it is awaiting the EPA’s reaction to the decision, and that the company will “use all legal remedies available to challenge this Order.”
  • Corteva is also reviewing its options and has clarified that its Tavium Plus VaporGrip dicamba-based herbicide is not part of the ruling.

Click here to read the entire article.

Pesticide License Expiration Date Extended

REYNOLDSBURG, Ohio (March 27, 2020) – With the signing of House Bill 197, Ohio’s COVID-19 emergency response legislation, the March 31, 2020 deadline for private pesticide applicators (farmers) and the May 31, 2020 deadline for agricultural fertilizer certificate holders to renew their license and get training has been extended.

The deadline is now 90 days after the state of emergency Executive Order ends or December 1, 2020, whichever comes first.