The Sidney herald., 1960-08-10
BY Paul Petrik. Supervisor. Richland County
Weed Control District

In our previous columns we
have discussed 2,4-D and soil ster-
ilants. This week we will discuss
some other selective h~erbicides.
2,4,5-T: This is a selective herb
icide sold either as amineS, eSterS
OF low volatile eSters and COM
monty used to control many
woody plants. Brush killer: May
be a mixture of 2,4-D and 2,4,5-T
in different proportions, commonly
used as a brush control chemical.
MCPA: One formulation of this
chemical is called Methoxone. 1t
is available as a sodium salt,
anime or ester formulation. 1t
is a close relative of 2,4-D but is.
less effective in controlling some
weeds. 1t is also less injurious
than 2,4-D to certain crops such
a. oats and flax.
4-(2,4-DB): The main differ
ence between this material and
2,4-D is the effect on certain
plants. This chemical is still ex-
perimental but looks very promis-
ing for selective broadleaf weed
control in legume crops.
CDAA: Available as Randox and
RandoX T, it is generally Used as
a pre-emergence herbicide. It acts
through the soil, killing germin-
ating weeds.
SimaZine: This is a relatively
new herbicide sold as a wettable
powder. 1t is useful as a soil
Sterilizing chemical and has been
found to be effective for control
ling both grass and broadleaf
weeds in orr However, its re-
sidual effect ON following crops
is yet unknown.
Dalapon: Available as Dowpon,
it is primarily a grass killer, eff
fective on both annual and per-
ennial grasses. 1t is sold as a
water soluble powder. The chemi-
cal acts primarily through foliage
but is also absorbed through the
soil.
Diuron: Available as Karrcex,
Diuron is one of a new group OF
urea compounds. 1t is sold as a
wtttable powder, containing 90
percent active material. 1t is APP
piled as a suspension in water,
Agitation is necessary to keep il
from settling in the sprayer tank
Diuron is primarily designed as
a long-lasting soil sterilant, but
at lighter rates it shows promise
for controlling weeds in alfalfa
seed crops.
DNBP: This is one of severa.
"dinitro" compounds. 1t is a vel
low liquid dye. The killing action
of DNBP is mainly non-Selective
by contact. However, the anime
salts of these products (availablt
as Dow Premerge and Sinox P. E.,
can be used for selective pre-
emergence and post-emergenct
weed control in peas, beans, pc.
tatoeS and corn. The anime salt
are soluble in water and contain
pounds active material per gallon
The acid (available as Dow
General, Chapman General an,
Sinox General) is oil soluble an,
contains 5 pounds active materia
per gallon. This acid may be ap
piled in an oil carrier or as al
emulsion with water. This form
is a contact herbicide. 1t kill
only those parts of the paint j
touches. Thorough coverage is es
sential for best results: therefore
use large amounts of solution =
so to 100 gallons per acre.
Dinitro compounds also ar
used as ,pre-harvest sprays TO
chemical drying of crops an
weeds before harvest.
Endothal: This is a water sol
uble material, formulated as tn
disodium salt and sold in liqui
form. In experimental studio
this material has shown promis
for control of certain weeds i
sugar beets. 1t also is a gener;
contact herbicide for pre-harve:
drying of seed crops such as a
falfa, clovers and beans.
IPC and CIPC: These chemica