Herbicide selectivity amides

Similarly, the selective herbicides, bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) and ioxynil (3,5-diiodo-4-hydroxybenzonitrile) are degraded by soil bacteria to their corresponding amide products 3,5-dibromo-4-hydroxybenzamide (BrAM) and 3,5-diiodo-4-hydroxybenzamide (IAM) but are not further degraded to the corresponding acids. The identification of amidases or nitrilases able to effect these transformations, in a soil bacterium, would be of value as a bioremediation agent [48],... 

Add Amides. The principal use of acid amide herbicides is the selective control of seedling grass and certain hroadleaved weeds. The majority of acid amide herhieide,x arc applied pre-emergence or pre-plum incorporated, except for propanil which is applied post-cmeigenee. 

Herbicides are chemicals used to destroy unwanted plants (terrestrial or aquatic) called weeds. Herbicides fall into two broad categories inorganic (e.g., copper sulfate, sodium chlorate, and sodium arsenite) and organic (e.g., chlorophenoxy compounds, dinitrophenols, bipyridyl compounds, carbamates, and amide herbicides). Historically, inorganic compounds were the first available and the first used. There has been over a long period a continuous effort to develop herbicide compounds that are more selective—that affect weeds, as opposed to desirable plants. 

Uses Napropamide is a slightly toxic amide herbicide. It is grouped by the USEPA under GUP.13 Napropamide is a selective systemic amide herbicide used to control a number of annual grasses and broadleaf weeds. It also is applied to soil growing vegetables, fruit trees and bushes, vines, strawberries, sunflowers, tobacco, olives, and other crops. The formulations include emulsifiable concentrate, wettable powder, granules, and suspension concentrates.12... 

The diethylamide (CDEA) and the diallylamide (CDAA) of monochloroacetic acid are also selective herbicides which kill grassy weeds (see Section 6.5). The herbicidal properties of the methylol and alkoxy-alkyl derivatives of monochloroacetic acid amide have also been described (Chupp, 1964a, 1964b Hamm... 

Starting with 3 the herbicidal activity is strongly increased by introduction of chlorine in the ortho-position, giving the selective paddy amide herbicide fentrazamide (4 2000, Lees ) [8] with excellent crop compatibility, even on young seedlings. 

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