Persistence and Activity of Dinitroaniline Herbicides in Soil
1977
Stoller, E. W. | Wax, L. M.
Greenhouse and field studies were conducted to determine the relative activity and persistence in soils of dinitramine (N⁴,N⁴-diethyl-α,α,α-trifluoro-3,5-dinitrotoluene-2,4-diamine), GS 38946 (N-ethyl-N-tetrahydrofurfuryl-4-trifluoromethyl-2,6-dinitroaniline), oryzalin (3,5-dinitro-N⁴,N⁴-dipropylsulfanilamide), trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine), profluralin [N-(cyclopropylmethyl)-α,α,α-trifluoro-2,6-dinitro-N-propyl-p-toluidine], nitralin [4-(methylsulfonyl)-2,6-dinitro-N,N-dipropylaniline], fluchloralin [N-(2-chloroethyl)-2,6-dinitro-N-propyl-4-(trifluoromethyl) aniline], benefin (N-butyl-N-ethyl-α,α,α-trifluoro-2,6-dinitro-p-toluidine), chlornidine [N,N-Bis(2-chloroethyl)-2,6-dinitro-p-toluidine], isopropalin (2,6-dinitro-N,N-dipropylcumidine), butralin [4-(1,1-dimethylethyl)-N-(1-methylpropyl)-2,6-dinitrobenzenamine], and AC 92390 (N-sec-butyl-2,6-dinitro-3,4-xylidine). For all plant species tested, dinitramine was most toxic and butralin was least toxic. These herbicides were considered moderately persistent, but dinitramine and butralin were less persistent than the others, a fact which may be of some practical significance. At normal use rates none of the herbicides showed residual activity to wheat (Triticum aestivum L.) planted 5 months after application, or to corn (Zea mays L.) planted 12 months after application.
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