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A herbicide is used to kill unwanted plants. Selective herbicides kill specific targets while leaving the desired crop relatively unharmed. Some of these act by interfering with the growth of the weed and are often synthetic "imitations" of plant hormones. Herbicides used to clear waste ground, industrial sites, railways and railway embankments are non-selective and kill all plant material with which they come into contact. Some plants produce natural herbicides, such as the genus Juglans (walnuts). They are applied in total vegetation control (TVC) programs for maintenance of highways and railroads. Smaller quantities are used in forestry, pasture systems, and management of areas set aside as wildlife habitat.

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Wikipedia about herbicide

A herbicide is used to kill unwanted plants. Selective herbicides kill specific targets while leaving the desired crop relatively unharmed. Some of these act by interfering with the growth of the weed and are often synthetic "imitations" of plant hormones. Herbicides used to clear waste ground, industrial sites, railways and railway embankments are non-selective and kill all plant material with which they come into contact. Some plants produce natural herbicides, such as the genus Juglans (walnuts). They are applied in total vegetation control (TVC) programs for maintenance of highways and railroads. Smaller quantities are used in forestry, pasture systems, and management of areas set aside as wildlife habitat.

Herbicides are widely used in agriculture and in landscape turf management. In the U.S., they account for about 70% of all agricultural pesticide use.Kellogg RL, Nehring R, Grube A, Goss DW, and Plotkin S (February 2000), Environmental indicators of pesticide leaching and runoff from farm fields. United States Department of Agriculture Natural Resources Conservation Service. Retrieved on 2007-10-03.

History

Prior to the widespread use of chemical herbicides, cultural controls, such as altering soil pH, salinity, or fertility levels, were used to control weeds. Mechanical control (including tillage) was also (and still is) used to control weeds.

The first widely used herbicide was 2,4-dichlorophenoxyacetic acid, often abbreviated 2,4-D. It was first commercialized by the Sherwin-Williams Paint company and saw use in the late 1940s. It is easy and inexpensive to manufacture, and kills many broadleaf plants while leaving grasses largely unaffected (although high doses of 2,4-D at crucial growth periods can harm grass crops such as maize or cereals). The low cost of 2,4-D has led to continued usage today and it remains one of the most commonly used herbicides in the world. Like other acid herbicides, current formulations utilize either an amine salt (usually trimethylamine) or one of many esters of the parent compound. These are easier to handle than the acid.

2,4-D exhibits relatively good selectivity, meaning, in this case, that it controls a wide number of broadleaf weeds while causing little to no injury to grass crops at normal use rates. A herbicide is termed selective if it affects only certain types of plants, and nonselective if it inhibits a very broad range of plant types. Other herbicides have been more recently developed that achieve higher levels of selectivity than 2,4-D.

The 1950s saw the introduction of the triazine family of herbicides, which includes atrazine, which have current distinction of being the herbicide family of greatest concern regarding groundwater contamination. Atrazine does not break down readily (within a few weeks) after being applied to soils of above neutral pH. Under alkaline soil conditions atrazine may be carried into the soil profile as far as the water table by soil water following rainfall causing the aforementioned contamination. Atrazine is said to have carryover, a generally undesirable property for herbicides.

Search results for Herbicide

Herbicide Resistance: Definition and Management Strategies

the herbicide is continually used, resistant plants successfully reproduce and ... subsequently exposed to Clopyralid, another picolinic acid herbicide, it also ...anrcatalog.ucdavis.edu/pdf/8012.pdf

Curtail® herbicide

Profile of Curtail herbicide from Dow AgroSciences. ... Curtail M herbicide ... U.S. Agriculture Home : Products : Curtail® herbicide ...www.dowagro.com/usag/prod/004.htm

Sonic® herbicide

Profile of Sonic® herbicide from Dow AgroSciences. ... New Sonic Herbicide Tackles Tough Broadleaf Weeds in Soybeans (News Release) ...www.dowagro.com/usag/prod/027.htm

GEO-PIE Project: Herbicide resistance

Glyphosate is a broad-spectrum herbicide-- that is, all green plants are ... Initially, this form of herbicide resistance was used as a selectable marker to ...www.geo-pie.cornell.edu/traits/herbres.html

AllDown Herbicide

AllDown Green Chemistry Organic Herbicide Provided by BioLynceus Biological Solutions providing safe alternatives to chemical solutions.www.alldownherbicide.com/

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News about Herbicide

China sets precedence for food-feed solution

AG WeeklyChina says short world grain supplies have persuaded it to release biotech rice nationwide, ensuring the broadest-ever use of genetic engineering in a food crop.http://www.agweekly.com/articles/2008/09/04/news/opinion/opi...

Eagle County Weed of the Week: Myrtle Spurge

Vail DailyThe noxious weed Myrtle Spurge thrives in a natural area near Vail. EAGLE COUNTY, Colorado —Introduced as a “waterwise” rock garden plant, Myrtle Spurge (Euphorbia myrsinites) has made the “A” List as one of Colorado’s noxious weeds.http://www.vaildaily.com/article/20080831/AE/808299938/1059/...

Farm fresh

Explorer NewsRandy Metcalf/The Explorer , Tucson Community Supported Agriculture volunteers, from left, Daniela Diamente, Ignacio River De Rosales and Neil Diamente, unload the day's produce selections for members to pick up.http://www.explorernews.com/articles/2008/09/04/el_sol/doc48...

Game and Fish report of Sept. 3

KSLA-TV ShreveportLITTLE ROCK, Ark. (AP) - Opening day of dove season is this Saturday. For those hunters still looking for a field to hunt, the Arkansas Game and Fish Commission maintains dove fields on some wildlife management areas.http://www.ksla.com/Global/story.asp?S=8949579

Finding a Dogged Dogwood

Washington PostQ We live on a three-acre wooded lot that used to have a beautiful lower canopy of dogwood trees that have died off over the years. Are there any new varieties that are resistant to the disease that has been killing them? Many of our red oaks are in decline as well. Is there anything we can do to reverse that?http://www.washingtonpost.com/wp-dyn/content/article/2008/08...

News about Herbicide

UPDATE 1-RESEARCH ALERT-JP Morgan raises Monsanto to overweight

ReutersHe expects higher profits at Roundup, the company's herbicide segment, and higher sales at the seeds segment, and raised his earnings estimate for 2009 to $5.00 a share from $4.60. Zekauskas said the company's business in glyphosate, a kind of ... http://www.reuters.com/article/marketsNews/idUSBNG1459262008...

Monsanto posts narrower 4Q loss, sales rise

San Diego Union-TribuneThe fourth quarter is generally losing one for Monsanto, because the company has seasonal seed sales. Monsanto says it trimmed its losses this year because of a jump in revenue from Roundup herbicide sales and by its seeds and traits business. It ... http://www.signonsandiego.com/news/business/20081008-0559-ea...

Monsanto reports smaller quarterly loss

CNN Money ... initially falling to a 52-week low of $68.02. The fourth quarter is generally a losing one for Monsanto, because the company has seasonal seed sales. Monsanto says it trimmed its losses this year because of a jump in revenue from Roundup herbicide ... http://money.cnn.com/2008/10/08/news/companies/monsanto.ap/i...

Wall St on roller-coaster ride after rate cuts

Washington PostMonsanto Co shares rose 16.7 percent to $86.55 after the company posted a smaller quarterly loss on Wednesday as strong herbicide and seed sales helped offset seasonal slowness and research and development costs. But Alcoa Inc shares fell 9.4 percent ... http://www.washingtonpost.com/wp-dyn/content/article/2008/10...

LI BUSINESS: THE WEEK AHEAD

NewsdayIt produces seeds and the Roundup herbicide, and its shares surged nearly 180 percent between the beginning of 2007 and mid-2008. Analysts expect a narrowed loss for the quarter, as Monsanto has few big competitors in the seeds business. Further up ... http://www.newsday.com/business/ny-bzherzbox5871835oct06,0,6...

Search results for Herbicide

herbicide definition |Dictionary.com

Sponsored Links Weed Killer Super Store Total, Selective & Aquatic Kills For Land or Water Applications InterstateProducts.comhttp://dictionary.reference.com/search?q=herbicide&db=*

herbicide definition of herbicide in the Free Online Encyclopedia.

herbicide (hr`bəsīd'), chemical compound that kills plants or inhibits their normal growth. A herbicide in a particular formulation and application can be described as selective ... http://encyclopedia2.thefreedictionary.com/herbicide

Clearpath - BASF Agricultural Products

By spraying Clarity® herbicide weed control from BASF, you can protect your corn plant, cotton, soy bean plant & other crops against coppeleaf, knotweed, henbit, bedstraw, sida ... http://clearpathherbicide.com

herbicide - definition of herbicide in the Medical dictionary - by the ...

herbicide. a substance that destroys weeds. A large number of chemical compounds are used as general and selective herbicides. Most of them have very low toxicity because their ... http://medical-dictionary.thefreedictionary.com/herbicide

TASKFORCE® Herbicide

Information on Taskforce herbicide for serrated tussock. ... Welcome to the TASKFORCE ® Herbicide site. This site provides information on the use and properties of TASKFORCE ® in ... http://www.taskforceherbicide.com/
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Schwarze Australia - Herbicide Weed...

Schwarze Australia - Herbicide Weed Control System.Operated from within the cab, this system automatically mixes herbicide from a stainless steel poison concentrate tank. It can be direct to either side of the sweeper.Flash - Video

Dow AgroSciences Herbicide Toleranc...

Dow AgroSciences Herbicide Tolerance Press ConferenceDow AgroSciences Herbicide Tolerance Press ConferenceFlash - Video

Common Plant Strains Resistant to H...

Common Plant Strains Resistant to Herbicides - videoSome strains of a common plant are actually becoming tolerant of a popular herbicide.Windows Media - Video

Herbicide Story Promo

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Herbicide+sucre

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Videos found for Herbicide

E4_all_agents2.avi

E4_all_agents2.aviClick one of the choices below if you want to see a bigger version of this movie.avi: 1.0 MB w:772px - h:576px

E4_all_agents_wide.mov

E4_all_agents_wide.movView movie using Windows Media Player (not recommended) View movie using Apple QuickTime , which is available at no cost from http://www.apple.com/quicktime/download/ for either a Mac or PC.quicktime: 2.8 MB w:772px - h:576px

a.mpg

a.mpgMovie showing herbicide uptake by a leaf (MPEG)Click here for more recent fluoresence movies from Jim Fenton , Brian Wade and Lloyd Wax .Download Multimedia Xplorer for MPEG (and most othermpeg: 0.1 MB w:256px - h:240px

Argentine, le soja de la faim

Argentine, le soja de la faimEn 1996, le gouvernement de Carlos Menem autorise la culture du soja transgénique, le Roundup Ready , en Argentine. Produit par la multinationale Monsanto, ce soja a été manipulé génétiquement ...msmedia: 2.8 MB w:384px - h:288px

mjv-101003.rm

mjv-101003.rma discussion with Paul Jasa, UNL extension engineer, on How to Keep Stored Grain in Good Condition. Real One player, which is available free on-line, is required to listen to either the video or aud...realmedia: 0 MB w:320px - h:240px

Answers for Herbicide

CrystalRain

How long do you have to wait to plant grass after using a herbicide?

CrystalRainIf you used a true herbicide, you don't have to wait long till you sow grass seed -- 2 weeks should do it. If you are using a germination inhibitor (like crabgrass preventer) you won't be able to rese...
basement1253

Invasive Bamboo roots under concrete how to remove with herbicide?

basement1253
nadams0868

Did I miss my window for Fall fetilizing and using herbicide?

nadams0868Actually, now is the perfect time. Don't use the herbicide though if it's raining. You need a cool calm day. Don't use dormant spray if you have trees-until leaf fall.
shizark420

Can I lime now then herbicide when stuff starts getting green?

shizark420You will be fine. The lime changes the acidity of the soil. It does not depend on weather, moisture or any other outside influence. My husband says "Go For It Now". A job done is a job done.
boricuababy1971

What herbicide can I use to kill cactus?

boricuababy1971Anything will do if it is strong enough, in England we have a thing called roundup - It kills of the root so the plant cannot grow. I do not know its chemical name.

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