1999 2000 Active substance 1st 2nd 3rd 4th 1st 2nd 3rd Time of calculation 24 58 28 26 76 825 92 Atrazine 0.0026 0.0160 0.0006 0.1146 0.1573 0.0134 BAM   (2.6 dichlorobenzamide) 0.0209 0.0031 0.0001 0.7113 1.7664 0.1779 Benazolin Bentazone 0.0036 0.0861 0.0345 0.0647 0.3454 0.0106 Bromoxynil 0.0010 0.0235 0.0533 Carbofuran Chloridazon 0.0002 0.0001 0.0094 0.0001 Chlorsulfuron Cyanazine 0.2545 0.0001 0.0102 0.0845 Desethylatrazine 0.0041 0.0120 0.0001 0.2823 0.1958 0.0037 Desethylterbuthylazine 0.0096 0.0828 0.0180 0.2806 0.2894 0.0676 Desisopropylatrazine 0.0020 0.0151 0.0004 0.1271 0.0138 0.0033 Dicamba 0.0427 0.0002 Dichlorprop 0.0005 0.0102 0.0542 Dimethoate Dinoseb 0.0005 Diuron 0.0041 0.7875 0.0009 0.0375 2.2245 0.0487 DNOC 0.0005 0.1291 0.0569 0.0927 0.0745 Ethofumesate 0.0102 Fenpropimorph 0.0010 0.0031 Flamprop Fluazifop 0.0005 0.0059 0.0124 Hexazinone 0.0483 0.0130 0.1396 0.1900 0.2898 0.0046 Hydroxyatrazine 0.0138 0.0003 0.2445 0.0006 Hydroxycarbofuran Hydroxysimazine 0.0058 0.1878 0.0006 Hydroxyterbuthylazine 0.0010 0.0827 0.1756 0.2631 0.0457 Ioxynil 0.0005 0.0333 Isoproturon 0.0005 0.0001 1.3176 3.3969 3.7596 0.2043 Lenacil 0.4116 Linuron 0.0001 0.0027 MCPA 0.0026 0.1726 0.2197 4.4203 0.0226 Mecoprop 0.0015 0.0001 0.0509 0.0272 0.0982 Methabenzthiazuron Metamitron 0.0015 0.0346 0.0576 Metribuzin 0.0006 0.0410 Metsulfuron-methyl Nitrophenol 0.0026 0.0744 0.4863 0.2955 0.7296 0.1417 Pendimethalin 0.0183 0.3093 0.0141 0.0067 Pirimicarb 0.0506 0.0717 0.0059 0.0447 Prochloraz 0.0017 Propiconazole 0.1108 0.0411 0.0272 0.0003 Propyzamide 1.1190 0.0026 Simazine 0.0255 0.0328 0.0034 0.0244 0.0002 Terbuthylazine 0.0729 0.1527 0.0136 0.4811 1.5827 0.4059 Thifensulfuron Triadimenol Triasulfuron 2.4-D 0.0101     2.4-dichlorphenol 0.0277