The University of Arizona

Table 4. Chemical Characteristics of Selected Landscape and Ornamental Herbicides

Common Name Trade Name Water solubility

(mg/L=ppm)

Vapor pressure

(mm Hg)

Photo-degradation

(half-life in days)

Koc

(mg/kg)

Soil binding Persistence (half-life in days)
acifluorfen Blazar 120 7.6 x 10-8 @ 25 C 4.5 113 strong 14-60
benefin Balan 0.1 7.8 x 10-5 moderate 9,000 strong 40
2,4-D numerous 900 1.4 x 10-7 @ 25 C minor 20 weak 10
DCPA Dacthal 0.5 2.5 x 10-6 @ 25 C minor 20 weak 10
dicamba Banvel 4,500/720,0001 9.2 x 10-6 @ 25 C negligible 2 weak 14-30
dichlobenil Casoron, Barrier 21.2 1.0 x 10-3 @ 25 C

1.5 x 10-2 @ 50 C

negligible 400 moderate 60
diquat Reward, numerous 718,000 <<10-8 @ 25 C negligible 1,000,000 extreme 1000
EPTC Eptam 370 3.4 x 10-2 @ 25 C negligible 170-280 moderate 6-32
fluazifop-p-butyl Fusilade 1.1 2.5 x 10-7 @ 25 C negligible 5700 extreme 15
glufosinate Finale 1,370,000 0 negligible 100 weak 7
glyphosate Roundup 15,700/900,0001 1.84 x 10-7 @ 45 C negligible 24,000 extreme 47
imazapyr Arsenal 11,272 < x 10-7 negligible ­ weak 25-142
imazaquin Image 60/160,000 <2 x 10-8 negligible 20 weak 60
isoxaben Gallery 1 3.9 x 10-7 @ 25 C negligible 190-570 strong 50-120
mecoprop (MCPP) numerous 620-acid

660, 000-salt

negligible 20 weak 21
metolachlor Pennant 488 3.1 x 10-5 @ 25 C

4.9 x 10-4 @ 25 C

8 200 moderate 60
MSMA numerous 1040000 negligible 7000 extreme 180
napropamide Devrinol 73 4 x 10-6 @ 25 C

1 x 10-4 @ 50 C

4 700 strong 70
oryzalin Surflan 2.6 <10-8 @ 25 C minor 600 strong 20-128
oxyfluorfen Goal 0.1 2 x 10-6 @ 25 C 20-30 100,000 extreme 35
pendimethalin Pendulum 2G, PRE-M60 Dg 0.275 9.4 x 10-6 @ 25 C minor 15,000 strong 44
prodiamine Barricade, Factor 0.013 2.5 x 10-8 @ 25 C 3 13,000 strong 120
prometon Pramitol 720 2.5 x 10-5 @ 50 C 47, moderate 150 moderate 500
sethoxydim Poast, Grass-Getter 257-4390 1.6 x 10-7 @ 25 C <4 hours 100 weak 5
triclopyr Turflon, Garlon 430 acid

2,100,000 salt

1.3 x 10-6 @ 25 C moderate 20 weak 10-46
trifluralin Treflan 0.3 1.1 x 10-4 @ 25 C moderate 7,000 extreme 45

1. Water solubility of acid/salt formulations

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