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 CHEMICAL, PHYSICAL, AND BIOLOGICAL PROPERTIES OF HERBICIDES AND PLANT GROWTH REGULATORS -- Continued
Acute Oral
Common and
Chemical Designations1
Toxicity,
Dermal
Trade Name and
(Cost per Pound; and
L D50 ( w / k g )
Manufacturer2
and Rating
Toxicity
Biological Information and Remarks
Commercial Formulation
Nonselective soil sterilants for control of herbaceous
slightly
BOROCIL
Boron compounds
2,000
weeds in noncropland sites and for use under asphalt
toxic
MONOBOR-
moderately
such as sodium metabo=
paving. It is adsorbed by mineral portion of soil and
toxic
CHLORATE
rate tetrahydrate,
is slowly leached. It usually persists for more than a
UREABOR
sodium tetraborate,
year. Less persistent with the coarser soils, low pH,
Occidental
disodium octaborate
and high rainfall. Usually mixed with more phytoto-
POLYBOR
tetrahydrate, borate-
xic herbicides, such as sodium chlorate, bromacil,
U.S. Borax
bromacil mixtures
and diuron, to increase range of weed species con-
UROX
($1.80/lb; granular,
trolled and for greater effectiveness,
Hopkins
soluble powder,
miscible liquid)
slightly
Soil-applied soil sterilant when used at higher rates
5,200
HYVAR-X Weed
Bromacil
Killer
slightly
toxic
on noncropland for control of annual and perennial
5-bromo-3- sec -butyl-
toxic
weeds and certain woody plants; and, at lower rates,
DuPont
6-methyluracil
for selective control of annual and perennial weeds in
($13.75/1b; wettable
citrus orchards, and for seedling weeds in pineapple.
powder)
It is sprayed or spread dry as granules on the soil
surface, preferably just before or during active
growth period of weeds. It is readily absorbed
through roots. It inhibits photosynthesis. Bromacil is
less subject to adsorption on soil colloids than many
other herbicides. It leaches slowly, and, at soil
sterilant rates, it persists for more than 1 year.
BUCTRIL
440
moderately
Foliage-applied herbicides for control of seedling
Bromoxynil
Rhone-Poulenc/
very
toxic
broadleaf weeds in cereal crops and flax, and newly
3,5-dibromo-4-
toxic
seeded turfgrasses. Also registered for control of
May & Baker
hydroxybenzonitrile
such weeds as Russian thistle on noncropland sites. It
BROMINAL
($21.25/lb;
Union Carbide
is a contact herbicide and acts as a photosynthetic
emulsifiable concentrate)
and respiratory inhibitor. It has no residual activity
in 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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