Posts Tagged ‘weeds’

2014 Weed School goes back to basics

Northeastern SARE is the sponsor of the 2014 Weed School

Northeastern SARE is the sponsor of the 2014 Weed School

Delaware Cooperative Extension as announced has announced its 2014 schedule of Weed School Training to be held at two locations in March. The weed management training will focus on weeds and issues with agronomic crops and commercial vegetables. The training will be conducted by Mark VanGessel, UD Cooperative Extension Weed Specialist and his research and Extension team. The objective of Weed Science School is to train agriculture industry professionals and those who work on weeds frequently. Topics will include weed management concepts and principles.

Mark VanGessel, UD Extension Weed Specialist at the 2013 Weed School

Mark VanGessel, UD Extension Weed Specialist at the 2013 Weed School

Classes start promptly at 8:30 a.m. and ends at 3:30 p.m. Lunch is provided and resources will be made available. There is no fee for the training.
CCA credits of 0.5 CEU for Soil & Water and 3.5 CEU for Pest Management; DE and MD Pesticide credits have been requested.


March 12, 2014 at the Kent County Extension Office, 69 Transportation Circle Dover, Del.19901

March 14, 2014 at the University of Delaware Research and Education Center Annex (old office building) 16686 County Seat Hwy., Georgetown, Del. 19947

Please pre-register by March 7 with Karen Adams at 302/856-2585 x540.

Training topics will include:

Weed Biology and Identification – 1 hour

This will include a discussion on weed life cycles (annual, biennial, perennial), with a special emphasis on problem weeds or weeds on the rise. Identifying live specimens and learning to use an I.D. key.

Integrated Management: it’s not just about herbicides – 50 minutes

Discuss alternatives to herbicides and non-herbicide practices for effective weed control. Topics to include cover crops, cultivation, cultural practices (row spacing, varieties, fertility).

Herbicides In the Plant: what’s going on in there – 50 minutes

This portion will discuss what happens to the herbicides once it enters the susceptible weeds (MOA) or enters the crop plant (metabolism). How herbicide MOA relates to symptoms observed in the crops will also be presented.

Herbicide Resistant Weeds and Crops: we like one but not the other – 50 minutes

This portion will include a discussion on herbicide resistant crops and weeds in the Northeast. What is the current situation, what is new and what may be coming? Incorporating resistance management strategies into the weed management program will be included.

Herbicides and Soils – 50 minutes

Herbicide interactions with soils will be discussed, including soil degradation and soil adsorption. Unintended movement of herbicides (drift, volatility, surface runoff, and leaching) will also be addressed.

Developing Weed Management Programs – 1 hour

This section will try to bring everything together by developing management scenarios for several cropping systems.

Click here to visit the University of Delaware weed science website

Palmer amaranth – the weed that takes an Extension village

In 2012, Delaware Department of Agriculture added Palmer amaranth, Amaranthus palmeri to its list of noxious weeds. Not only is the troublesome weed resistant to herbicides, it is a prolific seed producer, with each plant responsible for an average of half a million seeds. Unattended, the weed can quickly overtake a crop.

Extension Agent Emmalea Ernest, when not breeding lima beans, is defending them against the noxious weed Palmer amaranth

Palmer amaranth – one of six noxious weeds named by the Delaware Department of Agriculture’s Noxious Weed Program

Palmer amaranth isn’t shy about taking root in the vegetable trial plots located at the Thurman G. Adams Research Farm, part of the University of Delaware Carvel Research and Education agriculture experimental station.

For two days in August, and with man hours anticipated, it takes a village – a community of Extension hands – specialists, agents, students and summer employees to do what must be done, bend over and hand remove each plant. It’s old fashioned work, but the labor is an effective preventative measure.

“I estimate we’ve prevented billions, billions by hand removal,” says Emmalea Ernest, an Extension agent who spent about an hour this particular morning  in a lima bean field with three summer employees, Heather Baker, Abby Atkins and Danielle Vanderhei, yanking up the culprit weed. Palmer amaranth’s seeds are not airborne, and most commonly spread through agricultural and mowing equipment.

This particular plot, which Ernest estimates is nearly an acre, will take an a few more hours to get under control. “Fortunately, they are not deep rooted and are easy to pull up.”

Ernest said that Palmer amaranth, like most weeds, “reduces yields as it competes with the crop for water, sunlight and nutrients. If uncontrolled it would also make harvesting in that field very difficult.”


Summer employee Danielle Vanderhei starts at one row and starts pulling, one of four staff members weeding in the lima bean field on an August morning


Extension Weed Specialist Dr. Mark VanGessel examines a pulled specimen of Palmer amaranth

Carvel’s summer employees, Heather Baker and Abby Atkins make their way through a third of an acre lima bean plot, pulling up Palmer amaranth stalks before they go to seed. Fortunately they are taller and easy to spot.

For more free-use stock  photos of Palmer amaranth visit our Flickr set.

Article and photos by Michele Walfred

Cooperative Extension to hold Weed Science Field Day on Wed. June 27

Anyone with an interest in weed management is invited to  this year’s Weed Field Day at UD.  A variety of herbicide programs for conventional tillage and no-till production are being evaluated.  Many of the registered corn and soybean herbicides are being tested, herbicide evaluation for watermelons, weed control programs for snap and lima beans, and a number of studies with traditional soybean herbicide programs are included.  We have been fortunate with the weather to have all of the postemergence treatments applied to our corn and most soybean trials.  We will have more to view this year than we have had in the recent past.


The 2012 Weed Science Field Day will be held Wednesday, June 27, at the University of Delaware Research and Education Center, Route 9 (16483 County Seat Highway), Georgetown,.  The day will begin with registration at 8:15 at the Grove near the farm buildings and new office building on the north side of the road.  We will start to view the plots at 8:45 a.m.  Coffee, juices, and donuts will be provided.  We will also provide sandwiches for lunch.

Continuing education credits for Pesticide Applicators and Certified Crop Advisors will be available.

Here are some images from 2011 Weed Science Field Day