Pesticide Residues in the Environment - Pesticides: Evaluation of Environmental Pollution - page 158

TABLE 6.4 (Continued)
Properties of Different Classes of Pesticides

K ow
log P
(25°C)

Vapor Pressure
(mPa) (25°C)

Water Solubility
(mg/L) (25°C)

Half-Life in
Soil (days) Common Name

Pyridine herbicides
Diquatdibromide <0.013 a −4.6 700 a <7

Paraquatdichloride <0.01 −4.5 620 a <7

Chlormequatchloride <0.01 a −1.59 1000 a 1-28

Mepiquatchloride <0.01 a −2.82 500 10-97

Pyridazinone herbicides
Chloridazon

<0.01 a 1.19 340 a 21-76

Norflurazon 3.8×10 −3 2.45 34 45-180

Pyridate 4.8×10 −4a 4.01 Ca.1.5 a <3

Triazine herbicides
Atrazine 3.8×10 −2 2.5 33 a 35-50

Cyanazine 2.0×10 −4a 2.1 171 Ca.14

Metribuzin 0.058 a 1.6 a 1050 a 40

Prometryn 0.165 3.1 33 50

Simazine 2.9×10 −3 2.1 6.2 a 27-102

Terbutryn 0.225 3.65 22 14-50

Phenyl urea herbicides
Chlorotoluron 0.005 2.5 74 30-40

Diuron 1.1×10 −3 2.85 36 90-180

Fenuron 21 a — 3850 60

Isoproturon 8.1×10 −3 2.5 b 65 6-28

Linuron 0.051 b 3.0 63.8 b 38-67

Sulfonylurea herbicides
Azimsulfuron

4.0×10 −6 −1.37 1050 a —

Chlorsulfuron 3×10 −6 −0.99 7000 28-42

Flazasulfuron <0.013 −0.06 2100 <7

Imazosulfuron 4.5×10 −5 0.049 308 —

Metsulfuron-methyl 3.3×10 −7 −1.74 2790 7-35

Rimsulfuron 1.5×10 −3 −1.47 7300 10-20

Thifensulfuron-methyl 1.7×10 −5 0.02 6270 6-12

Triasulfuron <2×10 −3 −0.59 815 19

Tribenuron-methyl 5.2×10 −5 −0.44 2040 a 1-7

Benzoylurea insecticides
Diflubenzuron 1.2×10 −4 3.89 0.08 <7

Hexaflumuron 5.9×10 −2 5.68 0.027 c 50-64

Teflubenzuron 0.8×10 −6a 4.3 0.019 c 14-84

Triflumuron 4×10 −5a 4.91 0.025 c 112

Carbamate insecticides
Aldicarb

13 a — 4930 a 30

Carbaryl 4.1×10 −2 1.59 120 a 7-28