Insecticides     -     most applied to crops; nematocides applied to soils

(1/2 life)

LD₅₀ (rat)

(mg/kg BW)

DDT

5 yr

113

Lindane

3 yr

125

Heptachlor

2 yr

100

Dieldrin

1 yr

39

Aldrin

1 yr

40

Organophosphates    -    Replaced Organochlorines, very toxic, not persistent
                                               Polar bonds, water soluble, adsorb by dipole-dipole

Parathion

1-12 wk

4

Malathion

1-12 wk

1,000

Diazinon

1-12 wk

300

Carbamates    -    Replaced Organochlorines, very toxic, not persistent
                                Polar bonds, water soluble, adsorb by dipole-dipole or exchange

Carbaryl (Sevin)

1-8 wk

500

Temik

1-8 wk

1

Pyrethrium

Inorganics

Lead Arsenate

forever

  Fungicides

thiocarbamates

ferbam

mercurials

ceresan

Hg forever

others

copper sulfate

Cu forever

  Herbicides    -    used more than other two combined

phenoxyalkyl acids

2,4-D

6 mo.

370

(aka chlorophenoxy acids)

2,4,5-T

1-5 mo

500

triazines (most used)

atrazine

1-2 yr

3,000

simazine

1-2 yr

5,000

phenylureas

linuron

2-10 mo

aliphatic acids

dalapon

carbamates

butylate

2-8 wk

dinitroanilines

triflualin

dipyridyl

paraquat, diquat

amides

alachlor

benzoics

dicambra

2-12 mo