7
O7
FS 6
Revised March 1966
1966 Weed Control Recommendations
for Commercial Vegetable Crops
CROP
ARTICHOKES
ASPARAGUS
Seedbed
CHEMICAL
APPLICATION RATE
PER ACRE
FORMULATION
ACTUAL
TIME
Simazine
4 lbs.
5 lbs.
Fall
Dinitro amine
Stoddard
3 lbs.
50 gals.
1 gal.
50 gals.
Pre-emergence
Post-emergence
Monuron
solvent
Established
fields
Apply before broadleaf weeds
have more than 4 true leaves
1.6 to 3.2 lbs.
2 to 4 lbs.
Fall or spring
(Telvar)
or Simazine
Dinitro amine
After ferns die down, before
spears emerge, or after cutting
3 lbs.
Sesone
1.8 to 3.6 lbs.
1 gal.
2 to 4 lbs.
Winter
Summer
At end of cutting season after
2,4-D (sodium)
2 to 25 lbs.
Dalapon
1.6 to 2 lbs.
85 lbs.
3 lbs.
10 lbs.
2 (its.
Spring
Spring
Spring
For field bindweed control
Spot spray f or grass control
Before or after cutting
Dinitro amine
3 to 6 lbs.
15 to 45 lbs.
1 to 2 gals.
to 15 gals.
Pre-emergence
Post-emergence
When most beans are in crook
8 to 10 lbs.
I to 1 lbs.
9 to 12 lbs.
1 to 15 pts.
Pre-emergence
Pre-plant
9 lbs.
12 lbs.
Pre-emergence
3 lbs.
I gal.
Pre-plant
Amiben
4 lbs.
2 gals.
Pre-emergence
Salt (sodium
200 lbs.
200 lbs. in 100
Post-emergence
After beets have 2 or 3 leaves
chloride)
Stoddard
solvent
60 to 80 gals.
60 to 80 gals.
Pre-emergence
Apply after weeds emerge but
CDEC
(Vegadex)
Pyrazon
(Ryramin)
5.6 to 8.5 lbs.
6 lbs.
6 to 9 lbs.
15 gals.
Pre-emergence
Pre-emergence
4 lbs.
.
2 lbs.
I gal.
4 lbs.
I gal.
CDEC
(Vegadex)
4 lbs.
I gal.
6 lbs.
15 gals.
Trifluralin
(Treflan)
I to 1 lbs.
Ito II pts.
DCPA
(Dacthal)
9 lbs.
12 lbs.
NPA
(Alanap 3)
4 lbs.
Stoddarcl
solvent
Linuron
EPTC
(Eptam)
BEANS, snap and
REMARKS
lima
Before spears emerge
cultivation
stage; use low rate for high
temperature
PCP (sodium)
Snap beans only
(md. Romano)
Snap beans only
(IncI. Romano)
Lima beans only
BEETS
Trifluralin
(Treflan)
DCPA
(Dacthal)
EPTC
(Eptam)
TCA (sodium)
EPTC
(Eptam)
PEBC
(Tillam)
BROCCOLI
BRUSSELS
SPROUTS
CABBAGE
CAULIFLOWER
CANTALOUPES
CUCUMBERS
WATERMELONS
CARROTS
CELERY
DILL
PARSLEY
PARSNIPS
CORN, sweet
gals, water
lbs.
Immediately
When crop is grown by direct
seeding
2 gals.
Immediately
after seeding
Requires soil surface moisture
60 to 80 gals.
60 to 80 gals.
Post-emergence
Apply when crop
2 lbs.
25 lbs.
Pre-emergence
or
Post-emergence
For carrots or parsnips
15 lbs. of 80%
Pre-emergence
to, weeds and
within 3
weeks of
planting
Use shallow soil incorporation
or follow application with light
irrigation (1 inch) for best re-
1 lb.
6 lbs.
2 gals.
Pre-emergence
11 to 3 lbs.
5 to 1 gal,
Post-emergence
15 lbs.
I gal.
Pre-emergence
2 lbs.
I gal.
PCP (sodium)
EPTC
(Eptam)
8 to 10 lbs.
2 to 3 lbs.
9 to 12 lbs.
2,4-D amine
5 lb.
1 pint
plus
2,4-DEP
(Falone)
before beets emerge
For grass control
Post-emergence
Work into soil immediately by
Pre-plant
cross discing or rototilling
Pre-plant
Work into soil immediately by
cross discing or rototilling
5 lbs. of 80%
Dimtro amine
cross discing or rototilling
Pre or
4 lbs.
Dinitro amine
\Vork into soil immediately by
after seeding
After transplanting
Before or after
transplanting
After seeding
or transplanting
(Lorox)
Atrazine
Work into soil immediately by
cross rliscing or rototilling
or early
Direct the spray to base of
plants
ants have
3 leaves and weeds have emerged
For carrots only
stilts
For control of quackgrass or
other perennials
May be delayed until just before corn emerges
When corn is spike stage (1
to 2 inches tall) ; use low rates
for high temperatures
Mixture available as Falodin
post-emergence
to I gal.
Pre-emergence
Pre-plant
Work into soil immediately by
cross discing or rototilling
Plant corn shallowly
For control of nutgrass and
harnyardgrass
Post-emergence
After corn is up and until layh
time
Diirect spray to base of plants
after corn is 1 ft. tall
This is one of a series of Fact Sheds reporting Cooperative Extension work in agriculture and home economics,
Gene M. Lear, (brector. Printed and distributed in furtherance of Acts of Congress of May 8 and June 30,
1914. Oregon State University, Oregon counties, and LT. S. Department of Agriculture cooperating.
CROP
GARLIC
CHEMICAL
APPLICATION RATE
PER ACRE
FORMULATION
ACTUAL
Beet greens
Collards
Kale
Mustard
Rape
Spinach
Turnip greens
LETTUCE
DCPA
(Dacthal)
9 lbs.
12 lbs.
Pre-emergence
CDEC
(Vegadex)
CIPC
3 to 4 lbs.
3 to 4 qts.
P re-emergence
1 lb.
1 qt.
Pre-emergence
of water
TOMATOES
Follow application immediately
with light irrigation (1 Inch)
For fall plantings
Lower rate satisfactory only
when crop is seeded in cool wet
CIPC plus
CDEC
(Vegadex)
DCPA
(Dacthal)
CDEC
(Vegadex)
IPC
1 lb. CIPC
1 lb. CDEC
1 pt. CIPC
Pre-emergence
9 lbs.
12 lbs.
Pre-emergence
4 lbs.
1 gal.
Pre-emergence
6 lbs.
1
to 1 lb.
1 qt. CDEC
to 3 gals.
Pre-plant or
Pre-emergence
Pre-plant
2 to 3 qts.
CIPC
4 to 6 lbs.
1 to 11 gals.
CDAA
(Randox)
6 lbs.
11 gals.
DCPA
(Dacthal)
Potassium
6 to 9 lbs.
8 to 12 lbs.
71 to 15 lbs.
8 to 16 lbs.
weather of late fall
Mixture has given better weed
control in some tests
Follow application immediately
with light irrigation
Work into soil tmmediately by
cross discing or rototilling
Pre-emergence
Mineral soils
or until flag
stage
Organic soils (more than 20%
Pre-emergence
organic matter) or mineral soilt
or
Post-emergence
P re-emergence
When weeds
are small
Use low rate on onions with
Post-emergence
Apply when peas are 6 to
less than 3 leaves
MCPA
I to 1 lb.
MCPB
Dinitro amine
1 lb.
3 to 6 lbs.
I to 11 lbs.
I q.
IPC
5 lbs.
6.8 lbs.
Pre-plant
ature must be less than 85° F.
For wild oat control wOrk intc
DATC
(Avadex)
Barban
(Carbyne)
11 lbs.
11 qts.
Pre-plant
For wild oat control work intc
lb.
gal.
Post-emergence
soil by cross discing
For wild oat control
Diphenamid
3 to 5 lbs.
to I qt.
ito 2 gals.
to I gal.
Post-emergence
Pre-emergence
Post-emergence
3 to 61 lbs. of
80% or
50%
Pre-emergence
or 1 month
Use before flower buds form
Before peas bloom; air tempersoil by cross discing
Apply when wild oats have 2
Use low rate on light soil
after transplanting
2 gals.
After trans-
Trifluralin
(Treflan)
Ito 1 lbs.
1 to 11 pts.
Before or after
DCPA
(Dacthol)
9 lbs.
12 lbs.
After trans-
Amiben
4 lbs.
2 gals.
Pre-emergence
PEBC
(Tillam)
4 lbs.
gal.
Diphenamid
4 to 6 lbs.
Same as for
inches and before bloom
Use 12 gals. water
to 3 leaves
4 lbs.
Amiben
Summer squash and
Cucurbita pepo var.
Before garlic is 6 in. high
1 lb.
6 to 10 lbs. of
SQUASH
Post-emergence
Dinitro
cyanate
PEPPERS
Use low rate on garlic with lest
than 3 leaves
8 to 16 lbs. in
100 gals, of
water
1 gal. in 75 gals.
(Balan)
PEAS
When weeds
are small
71 to 15 lbs.
Benefin
ONIONS
REMARKS
Potassium
cyanate
selective
LEAF CROPS
TIME
Only on transplanted crop
planting
transplanting
planting
cantaloupes
Pre-plant
5 to 71 lbs. of
80% or
Aniiben
4 lbs.
8 to 12 lbs. of
50%
2 gals.
Immediately
after seeding
or transplanting
After trans-
Work into soil immediately by
cross discing or rototilling
Use low rate on light soil
Only on transplanted crop
planting
NOTE: 1. The chemical rates suggested are for complete coverage applications. For band applications reduce the quantity of material used proportionate
to the area actually sprayed.
For spray applications use 20 or more gallons of water per acre.
Pre-emergence applications of herbictdes are more satisfactory if applied to moist soil and followed immediately by a light irrigation or rain.
The first line of defense against weeds is the use of good
cultural practices. In fields with known weed infestations, where
possible select crops that respond to weed-control programs for
the weed species present. Adequate seedbed preparation improves
the effectiveness of chemical weed-control programs.
Cultivation is usually the most efficient method of removing
weeds from between rows of vegetable crops, and herbicide applications should be planned to supplement cultivation practices.
Weeds are killed most easily when conditions favor germination of weed seeds and rapid plant growth. Satisfactory results
can be expected if herbicides are applied as directed and under
normal conditions. Unusual temperatures or rainfall at the time
of, or soon after, application of herbicides may cause unsatisfactory results.
Soil characteristics, such as clay content and organic matter
level, strongly influence the effect of some herbicides. Heavier
soils usually require higher rates of application of pre-emergence
herbicides to obtain weed control than do lighter, sandy soils.
Remember: All agricultural chemicals are dangerous if
not handled properly. Store in locked compartments away
from children and destroy empty containers. Follow manu-
facturer's safety recommendations as listed on the label.