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2,4-DB or 4-(2,4-dichlorophenoxy)butyric acid is a selective systemic phenoxy herbicide used to control many annual and perennial broad-leaf weeds in alfalfa, peanuts, soybeans, and other crops. Its active metabolite, 2,4-D, inhibits growth at the tips of stems and roots. It is classified in toxicity class III.
Bentazon is a selective herbicide as it only damages plants unable to metabolize the chemical. [1] It is considered safe for use on alfalfa, beans (with the exception of garbanzo beans [1]), maize, peanuts, peas (with the exception of blackeyed peas [1]), pepper, peppermint, rice, sorghum, soybeans and spearmint; as well as lawns and turf. [3]
It functions by inhibiting photosynthesis and thus is a nonselective herbicide. It is used to control grasses, broadleaf, and woody plants. In the United States approximately 33% is used on alfalfa, 31% in forestry, 29% in industrial areas, 4% on rangeland and pastures, and < 2% on sugarcane. [2] Hexazinone is a pervasive groundwater contaminant.
2,4-Dichlorophenoxyacetic acid is an organic compound with the chemical formula Cl 2 C 6 H 3 OCH 2 CO 2 H.It is usually referred to by its ISO common name 2,4-D. [4] It is a systemic herbicide that kills most broadleaf weeds by causing uncontrolled growth, but most grasses such as cereals, lawn turf, and grassland are relatively unaffected.
Roundup Ready crops have both: Yield drag due to the modification itself interfering with yield production; and yield lag due to the delay in breeding the best new yield genetics into the RR lines. [20] Because this kind of testing is done under artificial conditions, these results do not hold for actual field conditions with weed pressure. [20]
Dicamba is a selective and systemic herbicide that kills annual and perennial broadleaf weeds. [10] Its primary commercial applications are weed control for grain crops and turf areas. It is also used to control brush and bracken in pastures, as well as controlling legumes and cacti.
Alfalfa is widely grown throughout the world as forage for cattle, and is most often harvested as hay, but can also be made into silage, grazed, or fed as greenchop. [23] Alfalfa usually has the highest feeding value of all common hay crops. It is used less frequently as pasture. [11]
Sulfentrazone is the ISO common name [3] for an organic compound used as a broad-spectrum herbicide. It acts by inhibiting the enzyme protoporphyrinogen oxidase. [4] It was first marketed in the US in 1997 by FMC Corporation with the brand name Authority.
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