CHEMICAL, PHYSICAL, AND BIOLOGICAL PROPERTIES OF HERBICIDES AND PLANT GROWTH REGULATORS -- Continued
(Cost per Pound; and
Trade Name and
L D50 (mg/kg)
Biological Information and Remarks
Postemergence and preemergence herbicide for turf
weeds such as speedwells, but mainly used for
control of aquatic weeds. It disappears from soil and
water by microbial degradation. Rate of breakdown
is dependent upon temperature. Potassium and
amine formulations are used for aquatic weed con-
trol. It has a short residual life in water. The amine
formulation is more toxic to fish.
A soil-applied, selective, preemergence herbicide for
control of germinating grass seedlings and certain
S-ethyl dipropyl =
broadleaf weeds in many crops and ornamental
plants. Effectiveness is improved by soil incorpora-
($4.85/lb; emulsi =
tion immediately after application, or by rain or
sprinkler application. EPTC is absorbed by roots and
translocated to leaves and stems. Mechanism of
action is not known. it readily volatilizes from the
surface of wet soil. Microbial degradation is mainly
responsible for disappearance in soils. Its half-life in
soil is about 1 week.
Pre- and postemergence herbicide in sugarbeets and
ryegrass for control of broadleaf and annual grasses,
including annual bluegrass. Absorbed by foliage of
benzofuranyl methane =
emerging shoot and by roots of most plants. Mode
of action is not known. Sugarbeet and ryegrass
metabolize ethofumesate. It does not leach in soil
having 1 percent or more organic matter. Degraded
by microorganisms in about 3 months.
A chemical name occupying two lines separated by an equal (=) sign would be joined together without any separation if written on one line.
Mention of trade name or company is for information only, and does not constitute an endorsement over other products not mentioned.