Weeds

Paulding County host location for Regional Weeds University on March 3

Registration link: http://go.osu.edu/23PauldingWeeds

OSU Extension invites crop producers, CCAs, and agribusinesses to attend a regional 2023 Ohio Weed University on Wednesday, March 1, or Friday, March 3 from 9:00 a.m. to 4:00 p.m. at locations across the state.

Locations will include:

  • March 1 – Highland County, Knox County, and Mercer County
  • March 3 – Clinton County, Paulding County, and Tuscarawas County

This program is designed to keep agronomic producers on the cutting edge in weed control for their cropping operations. Topics addressed will include hot topics in weed control, local weed issues, biology, identification of weeds, control strategies, cover crop management in forages, and evaluating herbicides. Hands-on exercises will be included. Continue reading →

Pre-Harvest Herbicide Treatments for Weed Desiccation

Note from Sarah: As a drive the insect scouting loop in Paulding County, I am noticing many fields invested with water hemp which is a great concern in weed control. Other things to make note of are barnyard grass, velvet leaf , marestail and volunteer corn.

By: Mark Loux

Source: https://agcrops.osu.edu/newsletter/corn-newsletter/2022-28/preharvest-herbicide-treatments-weed-desiccation

Waterhemp infestation.

There are plenty of fields with late-season weed problems this year. Weeds that come through the crop canopy late may be small or spindly or sparse enough to be handled easily by a combine. Other fields can benefit from a preharvest herbicide treatment to kill/dissociate weeds, which makes harvesting easier and can reduce weed seed production and foreign matter in harvested grain. Information on preharvest herbicide treatments for field corn and soybeans can be found in the “Weed Control Guide for Ohio, Indiana, and Illinois”, at the end of those crop sections (pages 75 and 146 of the 2022 edition). Products listed for corn include Aim, glyphosate, 2,4-D, and paraquat, and for soybeans include Aim, dicamba, paraquat, glyphosate, and Sharpen. Keep in mind that Aim and Sharpen have relatively narrow spectrums of activity, and will be less effective than the others across a broad range of weed species (i.e. make sure the target weed is something that they actually control). Continue reading →

Weed University RESCHEDULED for Friday, February 18.

Due to the weather, last week’s Weed University has been rescheduled and we have some spots open. The rescheduled training will be held on Friday, February 18. Registration will be 9:00 – 9:15 AM with the program beginning at 9:30 AM. Pre-registration is required as we are limited due to space with the hands-on activities and required materials. The link for registration is http://go.osu.edu/22PauldingWeeds.

2022 Ohio Weed University Regional Program – Paulding County Host Location

OSU Extension invites crop producers to attend a regional 2022 Ohio Weed University on Thursday, February 3 from 9:00 a.m. to 4:00 p.m. at the Paulding County Extension Office, Large Hall, 503 Fairground Drive, Paulding, OH 45879.

This program is designed to keep agronomic producers on the cutting edge in weed control for their cropping operations. Topics addressed will include hot topics in weed control, local weed issues, biology, identification of weeds, control strategies, cover crop management in forages, and evaluating herbicides. Hands-on exercises will be included. Featured speakers will include Dr. Mark Loux, State Weed Specialist, and Alyssa Essman from The Ohio State University. This is an “in-person” event with a portion of the program being conducted virtually at the above location.

The registration fee per person is $40 and is due by February 1, 2022, at 8:00 PM.

This fee includes course materials. Paulding Weeds University Flyer – 2022. The link to the online registration is at http://go.osu.edu/22pauldingweeds. With this link, you have the opportunity to pay with a debit/credit card.

Pesticide and Certified Crop Advisor (CCA) credits will be available. If you can’t attend the Paulding County event, there are other regional events. Please see the CORN Newsletter article at https://agcrops.osu.edu/newsletter/corn-newsletter/2022-02/2022-ohio-weed-university 

Enlist herbicide banned in 12 Ohio counties

By Mark Loux, Ohio State University Extension herbicide specialist

The U.S. Environmental Protection Agency issued a new seven-year registration for Enlist One and Enlist Duo, valid through January 2029. Changes include a revised application cutoff for soybeans, “through R1” that replaces “up to R2” on previous labels, and the addition of a slew of spray nozzles to the approved nozzle list. The most significant change for Ohio is that, due to changes in Endangered Species information, Enlist One and Enlist Duo cannot be used in 12 Ohio counties: Athens, Butler, Fairfield, Guernsey, Hamilton, Hocking, Morgan, Muskingum, Noble, Perry, Vinton, and Washington. We contacted Corteva to see if this was likely to change anytime soon, and got no assurances of this, although the PR information they have distributed indicates it is possible.

This really couldn’t happen at a worse time for growers in these counties. We’re in the middle of an endless pandemic, a worldwide shipping fiasco, with herbicide scarcities, price increases, and parts shortages. And just when you had it worked out to use Enlist herbicides on Enlist soybeans for 2022 so you wouldn’t have to deal with dicamba, their use is no longer legal in your county. We’re trying to find something reassuring to say here, but there’s not much. We lack solid information on herbicide availability and price, and it’s a fluid situation, but it appears that glyphosate and glufosinate can be in short supply, and prices are high. Continue reading →

Get your Waterhemp Populations Screened for Herbicide Resistance

By Mark Loux, OSU Extension

We have been screening a random sample of waterhemp populations for herbicide resistance over the past two years.  Herbicides used on the screen include mesotrione, atrazine, 2,4-D, fomesafen, and metolachlor.  Results of our research show that it’s possible for Ohio waterhemp populations to have some level of resistance to one, several, or all of these herbicides.  Glyphosate is not included because we assume almost all populations are already resistant to this.  We are also part of a regional project that has been screening for dicamba and glufosinate resistance with populations that we supply, although none has been identified to date. Continue reading →

Scout now for cressleaf groundsel in hayfields, or pay the price in May

Cressleaf GroundselBy Mark Sulc, OSU

Some hay producers have been unpleasantly surprised in the past when cressleaf groundsel infestations became evident in their hay fields in May prior to first cutting.  Cressleaf groundsel in hay or silage is toxic to animals, and infested areas of the field should not be harvested and fed.  Groundsel is a winter annual, emerging in late summer into fall when it develops into a rosette that overwinters.  Growth restarts in spring, with stem elongation and an eventual height of up to several feet tall.  The weed becomes evident in hayfields when it becomes taller than the alfalfa/grass and develops bright yellow flowers in May.  The problem with passively waiting until this point to discover that the hay is infested with groundsel is that: 1) it’s too late to control it with herbicides; and 2) hay from infested areas has to be discarded instead of sold or fed, and large plant skeletons are still toxic even if herbicides were effective on them.  Groundsel plants finish their life cycle in late spring, once they flower and go to seed, so it should not be a problem in subsequent cuttings. Continue reading →

Late-Season Waterhemp – The Goal is Stopping Seed

Flowering Waterhemp

By Mark Loux OSU Extension

In our windshield scouting of soybeans this year we have seen a lot of weed-free fields.  This makes sense given the shift toward Xtend, LibertyLink, LLGT27, and Enlist soybeans over the past several years, which provides us with effective POST options for our major weed problems – common and giant ragweed, marestail, and waterhemp (now if we could just get rid of the baggage some of these traits carry).  We are however getting many reports of late-season waterhemp as it grows through the soybeans and becomes evident.  This also makes sense given that statewide we are in the midst of an overall increase in waterhemp, and continue to move up the curve in terms of the number of fields infested and the size of the infestations.  Prevention and management of waterhemp and Palmer amaranth has been one of the primary goals of our state and county educational programs for half a decade or more.  And one of the most important points about waterhemp and Palmer that we try to get across is their capacity for prodigious seed production – 500,000 to upwards of a million seeds per plant – and what this means for their ability to rapidly ramp up populations, infest equipment, etc. Continue reading →

Paulding County Fertilizer and Pesticide Re-certification to be offered January 29

The OSU Extension Office in Paulding County will be hosting the Fertilizer and Pesticide Recertification on Tuesday, January 29, 2019.  Cost of the classes are as follows:

  1. Fertilizer Re-certification $10.
  2. Pesticide Re-certification $30.
  3. Registrations received after January 23rd will receive a $10 late fee.

Fertilizer re-certification will be held starting at 8:00 AM.  Please arrive between 7:45 and 8:00 AM to check in. Pesticide recertification registration will begin at 9:00 AM.  The class will begin at 9:15 AM.  Please call 419-399-8225 to register or email noggle.17@osu.edu.  Eventually online registration will be open with the option to pay by credit or debit card.  Payments can be made in person or by mailing a check to Paulding County Extension, 503 Fairground Drive, Paulding, OH 45879