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 CHEMICAL, PHYSICAL, AND BIOLOGICAL PROPERTIES OF HERBICIDES AND PLANT GROWTH REGULATORS -- Continued
Acute Oral
Common and
Toxicity,
Chemical Designations1
Dermal
Trade Name and
L D50 (mg/kg)
(Cost per Pound; and
Manufacturer 2
Toxicity
Biological Information and Remarks
and Rating
Commercial Formulation
A soil-applied herbicide on established plants and in
moderately
3,160
CASORON
Dichlobenil
aquatic situations. Main uses are in fruit crops and
toxic
moderately
Philips-Duphar
2,6-dichlorobenzo =
ornamentals. Applied to soil before expected rain or
toxic
Uniroyal
nitrile
irrigation. Dichlobenil is absorbed from the soil by
($31.00/lb; granular,
roots and is rapidly translocated to the tops. It
wettable powder)
inhibits growth of growing points and root tips, with
gross disruption of plant tissues. It leaches slowly in
the soil, but there is considerable diffusion in the
vapor phase. Loss of dichlobenil from the soil
surface can be rapid by volatility. Its half-life in soil
ranges between 1.5 and 12 months.
A selective preemergence herbicide that controls
slightly
970
ENIDE
Diphenamid
grasses and several broadleaf weeds mainly in vegeta-
toxic
moderately
Upjohn
N,N -dimethyl-2,2-
ble crops, fruit crops, woody ornamentals, and
toxic
diphenylacetamide
dicondra. Rain, sprinkler irrigation, or soil incorpo-
($8.00/lb; wettable
ration soon after application increases effectiveness.
powder)
It is mainly absorbed by roots and translocated
upward in the plant. It leaches rapidly in sandy soil
and more slowly in finer soils. Diphenanid is nonvol-
atile, but is degraded in soil microbially. Normal
persistence in soil is 3 to 6 months.
A nonselective, foliage-applied, contact herbicide for
very
ORTHO Diquat
230; very
Diquat
control of weeds in noncropland. Also a general
toxic
Chevron
toxic
6,7-dihydrodipyrido =
[ 1,2- α 2'b,1'-c] =
aquatic herbicide and a preharvest desiccant of seed
Chemical Co.
crops. Very rapidly absorbed by foliage and rapidly
REGLONE
pyrazinediium ion
kills contacted plant tissues. Translocation via xylem
I.C.I.
($34.00/lb; water-
can occur. Diquat is rapidly and completely inacti-
soluble liquid)
vated by soil.
1
A chemical name occupying two lines separated by an equal (=) sign would be joined together without any separation if written on one line.
2
Mention of trade name or company is for information only, and does not constitute an endorsement over other products not mentioned.
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