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poison free gardening, Victoria BC, Vegetable Production Guide - Corn


Ohio State University
1999 Ohio Vegetable Production Guide - Bulletin 672 - Jan. 2000
Sweet Corn

[ Ohio State University Web site ]




2 ears of corn Sweet Corn - this is the first site I found which provides an extensive description of current agricultural recommendations for corn. And it is enough to make one's hair stand on end.

As these agricultural recommendations show, corn is heavyly and often treated - frequently at 5 day intervals - with a wide range of agricultural poisons.

As the presence of DDT, and four other major agricultural poisons in the blood of every living thing - as well as in every mother's milk - so amply demonstrates, every chemical we put in or on the earth eventually ends up in us.


Disease Control - Damping off
Buy commercial fungicide-treated seed, if available. If not, dust or pellet seed according to label instructions with Captan or Apron 25 W.

Leaf blight - Northern corn blight, Southern corn blight
Application of fungicides is seldom economically feasible. If necessary, spray at weekly intervals with one of the following:
Dithane F45 (4F) 2.4 pt/A (7 days-PHI
Maneb + Zn (4 F) 2.4-4.8 pts/A (0 days-PHI)
Maneb (75DF) 1.5 lb/A (7 days-PHI)
Bravo 720 (6 F) 0.75-2.0 pt/A (14 days-PHI)
Bravo 500 (4.17 F) 1.1-2.75 pt/A (14 days-PHI)
Penncozeb (75DF) 1.0-1.5 lb/A (7 days-PHI)
Use Bravo and Terranil for fresh market only (see label directions)
Before applying Maneb (or other EBDC fungicides) check with potential buyers to ascertain if crops treated with this fungicide will be commercially acceptable.

Smut - No fungicides are available for control.
Late varieties are reported to be more tolerant than early varieties.

Stewart's Wilt - Stewart's wilt is a bacterial disease that usually arises following mild winters. It is spread by corn flea beetles. Control flea beetles early with a recommended insecticide to control seedling wilt. Use resistant cultivars where available.

Viruses - Sweet corn in Ohio may be affected by maize dwarf mosaic virus (MDMV), which is vectored by aphids, and maize chlorotic dwarf virus (MCDV), which is vectored by leafhoppers. These viruses are usually a problem in southern Ohio or on late planted sweet corn in northern Ohio. Both viruses are harbored in Johnsongrass. Control of either of the vectors with insecticides does not prevent these diseases, but control of Johnsongrass in southern areas will help control these diseases. Although all varieties are susceptible, some are reported to have tolerance. Sweet corn varieties with high quality and good tolerance are under development. Consult seed catalogs for current information.

Rust - If rust develops on early plantings, fungicide applications should be considered for later plantings. Spray at 7-day intervals with one of the following:
Dithane F45 (4F) 2.4 pt/A (7 days-PHI)
Bravo 720 (6F) 0.75-2.0 pt/A (14 days-PHI)
Bravo 500 (4.17 F) 1.1-2.75 pt/A (14 days-PHI)
Tilt 4 fl oz/A, 7-14 day schedule (14 days-PHI)
Before applying Dithane (or other EBDC fungicides) check with potential buyers to ascertain if crops treated with this fungicide will be commercially acceptable.

Insect Control - See the tables on page 197 for overview of insecticides used to control sweet corn pests.

Spray Schedule - for Corn Earworm based on # of moths caught/week in trap

Trap Catch air temp. 80 (-) air temp 80 (+)
90 + 2-3 day 4 day
6-90 4 day 5 day
0-5 5-7 day 5-7 day


Seed treatment: - Diazinon
Diazinon 50WP: 0.5 oz/bu of seed for seedcorn maggot;
3 oz/bu of seed for seedcorn beetle.

Lindane - Isotox Seed Treater 25% a.i.;
Lindane 25EC-LF: 4-8 oz per 100 lb seed.
Maneb-lindane (18.75%) Seed Protectant: 3 oz/bushel for wireworms.

Pre-plant broadcast treatment: - Chlorpyrifos

Lorsban 4E 2-4 pt/A - for cutworms and garden symphylans;
4 pt/A for seedcorn maggot, seedcorn beetle, wireworms, white grubs, and flea beetle larvae;
6 pt/A for rootworms. Incorporate 2-4 inches
Lorsban 15G: 6.75-13.5 lb/A for cutworms;
13.5 lb/A for wireworms, white grubs, and flea beetle larvae. Incorporate 4-6 inches.
Limit 13.5 lb/A per season.

Diazinon - for all formulations
incorporate 1-3 inches for surface cutworms, 3-6 inches for subterranean cutworms, 4-8 inches for wireworms, or 2 inches for seedcorn maggot.
Diazinon AG500 (4EC): 2-4 qt/A
D-Z-N AG600: 51-102 fl oz/A
Diazinon 50WP: 4-8 lb/A.
Diazinon 14G: 14-28 lb/A.

Ethoprop - for cutworm control,
broadcast and incorporate 2 inches.
Mocap 10G: 30 lb/A.

Fonofos - for garden symphylans,
corn rootworms, wireworms. Incorporate after application.
Dyfonate 4EC:
2 qt/A for symphylans;
3 qt/A for rootworms;
4 qt/A for wireworms and for suppression of black cutworms.
Dyfonate II 15G:
13.4 lb/A for symphylans;
27 lb/A for wireworms and rootworms.

Permethrin - for armyworms and cutworms.
Pounce 1.5G: 6.7-13.3 lb/A.
Apply from 5 days prior to planting up to emergence of crop.

At-planting treatment:

Carbofuran - Note: Sale and use of Furadan 15G has been prohibited on sweet corn since September 1, 1994

Furadan 4F: - for seedcorn maggot, wireworms, and flea beetles,
2.5 fl oz/1,000 ft. into seed furrow.
For rootworms and flea beetles, apply in band or inject on each side of row.
Will also suppress armyworms.

Chlorethoxyfos - for rootworms, wireworms, cutworms, seedcorn maggot, white grubs, symphylans.
Fortress 2.5G: 6 oz/1,000 ft.
Fortress 5G: 3 oz/1,000 ft.

Chlorpyrifos - rates given per 1,000 ft of row. Band treatment
Lorsban 15G:
8 oz for rootworms, cutworms, seedcorn maggot;
8-12 oz for garden symphylans;
8-16 oz for seedcorn beetles;
16 oz for wireworms and white grubs.
In-furrow treatment:
8 oz for seedcorn maggot;
8-16 oz for grubs and seedcorn beetles;
16 oz for cutworms and wireworms
Incorporate 1 inch. Limit 16 oz/1,000 ft per crop season.

Ethoprop - for cutworms, rootworms, wireworms, garden symphylans; white grubs
Apply in band over closed seed furrow; incorporate 1/2 inch.
Mocap 6EC: 1.4-2.9 fl oz/1,000 ft.
Mocap 10G: 10.5-21.5 oz/1,000 ft (13.3 lb/A for 30-inch rows).

Ethoprop + phorate - for rootworms, wireworms, seedcorn maggot, seedcorn beetle.
Holdem 20G: 6-10 oz/1,000 ft of row

Fonofos - Do not place Dyfonate in direct contact with seed.
Apply in band and incorporate 1/2-1 inch.
Dyfonate 4EC: 0.75-1 qt/A (for 38- to 40-inch rows) for rootworms.
Can be used for split boot application with compatible fertilizer (use 1 qt Dyfonate in 5-20 gal of fertilizer).

Dyfonate II - for rootworms, seedcorn maggot, seedcorn beetle, black cutworm.
15G: 8 oz/1,000 ft

Permethrin - for armyworms and cutworms.
Pounce 1.5G: 8-16 oz/1,000 ft.
Apply from 5 days prior to planting up to emergence of crop.

Phorate - for seedcorn maggot, seedcorn beetle, corn rootworms, wireworms, white grubs, garden symphylans, and flea beetles.
Apply in band and lightly incorporate. Do not place granules in direct contact with seed.
Thimet 15G: 8 oz/1,000 ft.
Thimet 20G: 6 oz/1,000 ft.
Rampart 10G: 12 oz/1,000 ft.

Tebupirimphos + cyfluthrin - for rootworms, cutworms, wireworms, seedcorn maggot and beetle, white grubs.
Aztec 2.1G: 6.7 oz/1,000 ft (limit 7.3 lb/A per year).

Tefluthrin - for rootworms, cutworms, other soil pests. Force 3G: 3-5 oz/1,000 ft of row.

Terbufos - for seedcorn maggot, seedcorn beetle, rootworms, garden symphylans, and flea beetles. Will also suppress cutworms
Apply in band and lightly incorporate, or apply in seed furrow.
Counter 20CR: 6 oz/1,000 ft. Limit 6.5 lb/A.
Counter 15G: 8 oz/1,000 ft (Limit 8.7 lb/A).

Bait treatment

Carbaryl (0 days-PHI) - for cutworms, armyworms.
Sevin 5% Bait: 20-40 lb/A or 7.3-14.7 oz/1,000 sq ft.
Prozap Sevin 10% Bait Granules: 10-20 lb/A.

Metaldehyde - for slugs. Apply to soil surface around plants.
Deadline MP (4B): 20-40 lb/A.
Prozap Snail and Slug AG (3.5B): 24-40 lb/A.

Treatment at cultivation

Chlorpyrifos (35 days-PHI) - for corn rootworms (larvae).
Lorsban 4E: 2 pt/A. Limit 15 pt/A per season.
Lorsban 15G: 8 oz/1,000 ft. Limit 16 oz/1,000 ft per season.

Ethoprop - for corn rootworms (larvae).
Mocap 10G: 10.5 oz/1,000 ft.

Fonofos (45 days-PHI) - for corn rootworms (larvae).
Dyfonate II 15G: 8 oz/1,000 ft. Apply in band and cover with 2-3inches of soil.

Phorate - for corn rootworms (larvae).
Thimet 15G: 8 oz/1,000 ft (8.7 lb/A for 30-inch rows).
Thimet 20G: 6 oz/1,000 ft (6.5 lb/A for 30-inch rows).
Rampart 10G: 12 oz/1,000 ft.

Tefluthrin - for rootworms (larvae).
Force 3G: 4-5 oz/1,000 ft of row.

Terbufos - for corn rootworms
(larvae).
Counter 15G: 8 oz/1,000 ft. Limit 8.7 lb/A.
Counter 20CR: 6 oz/1,000 ft. Limit 6.5 lb/A.
Granular treatment in whorls

Bacillus thuringiensis(0 days-PHI) - for European corn borer, Fall Armyworm.
M-Peril (3.75% a.i.): 10-20 lb/A broadcast or 6-12 oz/1,000 ft banded.
DiPel 10G: 10 lb/A broadcast; 5-10 lb/A banded.
Full-Bac 4.7G: 10 lb/A broadcast or 9-12 oz/1,000 ft.
Condor G (0.5% a.i.): 10 lb/A broadcast or 5-10 lb/A banded.
Lepinox G (2% a.i.): 5-10 lb/A.

Chlorpyrifos (35 days-PHI) - for European corn borer.
Lorsban 15G: 6-8 oz/1,000 ft, or 5-6.5 lb/A broadcast.

Fonofos (30 days-PHI) - for European corn borer.
Broadcast or apply in 6- to 8-inch bands. Dyfonate II 15G: 4-8 oz/1,000 ft (5 lb/A).

Permethrin (1 day-PHI) - for European corn borer, armyworm, cutworms, stalk borer.
Pounce 1.5G: 8-16 oz/1,000 ft (6.7-13.3 lb/A). Limit 80 lb/A per season.

Foliar treatment

Bacillus thuringiensis (0 days-PHI) - for cutworms, armyworm, corn earworm, European corn borer.
Agree WG (3.8% a.i.): 1-2 lb/A.
Biobit XL FC (2.1% a.i.): 1.5-5.5 pt/A for armyworm; 1.5-4 pt/A for corn borer.
CryMax WDG (15% a.i.): 0.5-1.5 lb/A.
DiPel ES (3.5% a.i.): 1.5-2.5 pt/A for European corn borer.
DiPel 2X WP (6.4% a.i.): 0.5-2 lb/A for armyworms.
Javelin WG (6.4% a.i.): 0.5-1.25 lb/A for armyworm.
MVP (10% a.i., encapsulated): 1-4 qt/A for European corn borer, armyworms.
Lepinox WDG (15% a.i.): 1-2 lb/A.
Troy-BT (26% a.i.): 2 oz/A for variegated cutworm, armyworm.

Carbaryl (2 days-PHI) - for cutworms, armyworm, European corn borer, fall armyworm, corn earworm, Japanese beetle, sap beetles, rootworm beetles.
Carbaryl 90DF: 1.1-2.2 lb/A.
Carbaryl 4L; Sevin 4F; Sevin XLR Plus (4EC):
2 qt/A for cutworm;
1-2 qt/A for armyworm, flea beetle, corn earworm, fall armyworm, silk-clipping beetles;
1.5-2 qt/A for European corn borer.
Sevin 80S:
2.5 lb/A for cutworm;
1.9-2.5 lb/A for corn borer;
1.25-2.5 lb/A for other pests.
Sevin 50WP: 6 oz/1,000 ft (4-13 lb/A) for cutworm;
2-4 lb/A for other pests.

Carbofuran (7 days-PHI) - for second generation European corn borer; corn earworm.
Furadan 4F: 1 pt/A. Machine harvested only. Do not make a foliar application if Furadan used at planting.
Limit 4 sprays per season.

Chlorpyrifos (35 days-PHI) - for cutworms, armyworm, flea beetle, aphid, European corn borer, corn earworm, rootworm beetles.
Lorsban 4E: 2-3 pt/A for cutworms, flea beetle;
apply when soil is moist and worms are active on or near the soil surface; if dry, then use shallow incorporation.
1-2 pt/A for armyworm, aphid, European corn borer, rootworm beetles.
1.5-2 pt/A for corn earworm. Limit 15 pt/A per season.

Cyfluthrin (0 days-PHI) - for European corn borer, corn earworm, cutworms.
Baythroid 2EC: 1.6-2.8 fl oz/A for borers or earworms;
0.8-1.6 fl oz/A for cutworms.

Diazinon (7 days-PHI) - for flea beetle, aphid, corn earworm, sap beetles, grasshoppers, rootworm beetles.
Diazinon AG500 (4EC):
1 pt/A for flea beetle, grasshoppers;
1-2 pt/A for aphid; 1-1.25 qt/A for corn earworm; 0.5-1 pt/A for rootworm beetles; 2-2.5 pt/A for sap beetles.

Diazinon 50WP - for flea beetles, grasshoppers, aphids, corn earworm, sap beetles.
1 lb/A for flea beetles, grasshoppers;
1-2 lb/A for aphid;
2-2.5 lb/A for corn earworm, sap beetles.

Endosulfan (1 day-PHI) - for aphids, corn earworm.
For use on fresh-market corn only.
Thiodan 3EC; Phaser 3EC:
1.3 qt/A for aphids;
2 qt/A for corn earworm. Limit 4 qt/A per year or 3 applications per year.

Thiodan 50WP 2 lb/A for aphids;
3 lb/A for corn earworm. Limit 6 lb/A per year.

Endosulfan + pyrethrins (0 days-PHI) - for aphids, corn earworm.
Thirethrin 2.5EC: 2-3 qt/A.

Esfenvalerate (1 day-PHI) - for cutworms, armyworm, flea beetle, aphid, corn earworm, European corn borer, sap beetles, rootworm beetles.
Asana XL (0.66EC): 5.8-9.6 fl oz/A. Limit 96 fl oz/A per season.

Lambda-cyhalothrin (1 day-PHI) - for corn earworm, European corn borer, early instars of fall armyworm; rootworm beetles, Japanese beetles.
Warrior 1EC: 2.66-3.84 fl oz/A. Limit 3.84 pt/A per year.

Malathion (5 days-PHI) - for Japanese beetle.
Malathion 5EC: 2 pt/A. Injury may occur in the whorl or to the silks.

Malathion + methoxychlor (5 days-PHI) - for Japanese beetle.
Malathion Methoxychlor Spray (2+2EC): 2 qt/A.

Methomyl (0 days-PHI) - for cutworms, armyworm, flea beetle, aphid, European corn borer, corn earworm, fall armyworm, rootworm beetles, picnic beetles.
Certain hybrids are susceptible to methomyl injury; treat a small area to determine crop safety before full-scale spraying. Use high end of rate for cutworms.
Lannate 90SP: 0.25-0.5 lb/A.
Lannate LV (2.4EC): 0.75-1.5 pt/A.
Limit 28 applications/crop.

Methoxychlor (7 days-PHI) - for armyworm, flea beetle, fall armyworm, Japanese beetle.
Methoxychlor 4L: 1-2.25 qt/A.
Methoxychlor 2EC: 2-4.5 qt/A.
Marlate 50WP: 2-4.5 lb/A.

Methyl parathion (3 days-PHI) - for black cutworm, armyworm, flea beetle, aphid, corn earworm, European corn borer, rootworm beetles, sap beetles. Do not apply to blooming crops or weeds when bees are foraging.
Penncap-M (2F, encapsulated):
4 pt/A for black cutworm; apply under moist soil conditions.
2-3 pt/A for armyworm, flea beetle, aphid.
2-4 pt/A for corn earworm, European corn borer, sap beetles;
1-2 pt/A for rootworm beetles.

Oxydemeton-methyl - for aphids, rootworm beetles. (7 or 21 days-PHI: 21 days-PHI if 2 or 3 applications per season; 7 days-PHI if 1 application) Metasystox-R (2SC): 1.5-2 pt/A.

Parathion (12 days-PHI) - for aphids.
Restricted to aerial application only; 6 day reentry.
Paraspray 4E: 0.5 pt/A.
Parathion 8, Paraspray 8E: 0.25-0.5 pt/A.

Parathion + methyl parathion (12 days-PHI) - for aphids.
Restricted to aerial application only; 6 day reentry.
Dithon 63; Paraspray 6-3 (6 lb/gal parathion + 3 lb/gal methyl parathion): 0.5 pt/A.

Permethrin (1 day-PHI) - for flea beetle, European corn borer, corn earworm, fall armyworm, rootworm beetles.
Pounce 3.2EC: 4-8 fl oz/A. Limit 48 fl oz/A per season.
Ambush 2EC: 6.4-12.8 fl oz/A. Limit 76 oz/A per season.
Pounce 25WP, Ambush 25WP: 6.4-12.8 oz/A. Limit 76 oz/A per season.

Thiodicarb (0 days-PHI) - for fall armyworm, European corn borer, corn earworm.
Ohio 24c label for sweet corn.
Larvin 3.2F: 20-30 fl oz/A.

Weed Control - Preplant Incorporated

Alachlor - controls annual grasses, yellow nutsedge, and some annual broadleaf weeds. Incorporation improves suppression of yellow nutsedge. Can be tank-mixed with atrazine or cyanazine.
Lasso 4EC, Micro-Tech: 4-8 pt/A. Partner WDG: 3-6 lb/A.

Atrazine - controls annual broadleaf weeds.
Triazine resistant biotypes are known to occur and must be controlled by herbicides with a different mode of action. Maximum use rate in any year is 2.5 lb/A. Do not apply to ground to be planted to anything other than corn next year. Consult the label for precautionary statements to avoid ground and surface water contamination. Observe the following guidelines for use on highly erodible land.

Highly erodible land with less than 30% residue cover:

AAtrex 4L, Drexel Atrazine 4L, Helena Atrazine 4L, Riverside Atrazine 4L, Wilbur-Ellis Atrazine 4 L: 3.2 pt/A. Drexel Atra-5: 2.4 pt/A. Aatrex Nine-0, Accu-Pak (WDG), Drexel Atrazine 90DF, Riverside Atrazine 90 DF: 1.8 lb/A.

Not highly erodible land or at least 30% residue cover:

AAtrex 4L, Drexel Atrazine 4L, Helena Atrazine 4L, Riverside Atrazine 4L, Wilbur-Ellis Atrazine 4 L: 4 pt/A. Drexel Atra-5: 3.2 pt/A. Aatrex Nine-0, Accu-Pak (WDG), Drexel Atrazine 90DF, Riverside Atrazine 90 DF: 2.2 lb/A.

Cyanazine - controls annual broadleaf weeds and grasses.
Resistant bio-types of certain broadleaf weeds are known to occur and must be controlled by herbicides with a different mode of action.
Bladex 4L, Cy-Pro 4L: 2 pt/A.
Bladex 90DF, Cy-Pro 90DF: 1.1 lb/A.
May be tank-mixed with alachlor and atrazine. Pre-formulated mixtures may be available. Cannot be used after Dec. 31, 2002.

Metolachlor - controls annual grasses, yellow nutsedge, and certain broadleaf weeds.
Dual 8E or Dual II: 1.3-5 pt/A.
Dual IIG: 6-12 lb/A.
Dual II Magnum: 1-2 pt/A.
Preplant incorporate to improve control of yellow nutsedge. Dual products can be tank-mixed with atrazine. Dual II contains an additive which enhances crop safety. Dual II Magnum is a purified form of metolachlor and can be used at reduced rates.

EPTC + antidote - controls annual grasses, yellow nutsedge, and suppresses quackgrass.
Eradicane 6.7-E: 4.75-7.33 pt/A.
Eradicane 25-G: 16-24 lb/A.
Must be incorporated in two directions, immediately after planting to a depth of 2-3 inches.

Dimethenamid - controls annual grasses, yellow nutsedge, and certain annual broadleaf weeds.
Frontier 6.0: 1-2 pt/A.
Rate selection within this range depends upon soil cation exchange capacity or soil texture and % organic matter. Check the label for specific directions. Maximum control of yellow nutsedge, seedling johnsongrass, and annual nightshades requires the 2 pt/A rate. Before application verify with your local seed company or supplier the selectivity of Frontier 6.0 on your specific varieties to avoid potential crop injury to sensitive varieties. Do not apply if conditions of high rainfall, water saturated soil, or cool weather occur between the period from germination to corn emergence. Application during or prior to such conditions may result in delayed emergence or leaf wrapping. Frontier 6.0 can be tank-mixed with atrazine, cyanazine, Eradicane, or Basagran.

Butylate - controls annual grasses and yellow nutsedge.
Sutan +: 4.75 pt/A.
Incorporate immediately after application. Two passes in opposite directions are required. Controls annual grasses and can be tank-mixed with atrazine or cyanazine for broader spectrum control of grasses and annual broadleaf weeds.

Preemergence

Alachlor - controls annual grasses, yellow nutsedge, and some annual broadleaf weeds.
Lasso 4EC, Micro-Tech: 4-8 pt/A.
Partner WDG: 3-6 lb/A.
Incorporation improves suppression of yellow nutsedge. Can be tank-mixed with atrazine or cyanazine.

Atrazine - controls annual broadleaf weeds.
Triazine resistant biotypes are known to occur and must be controlled by herbicides with a different mode of action. Maximum use rate in any year is 2.5 lb/A. Do not apply to ground to be planted to anything other than corn next year. Consult the label for precautionary statements to avoid ground and surface water contamination. Observe the following guidelines for use on highly erodible land.

Highly erodible land with less than 30% residue cover:

AAtrex 4L, Drexel Atrazine 4L, Helena Atrazine 4L, Riverside Atrazine 4L, Wilbur-Ellis Atrazine 4 L: 3.2 pt/A. Drexel Atra-5: 2.4 pt/A. Aatrex Nine-0, Accu-Pak (WDG), Drexel Atrazine 90DF, Riverside Atrazine 90 DF: 1.8 lb/A.

Not highly erodible land or at least 30% residue cover:

AAtrex 4L, Drexel Atrazine 4L, Helena Atrazine 4L, Riverside Atrazine 4L, Wilbur-Ellis Atrazine 4 L: 4 pt/A. Drexel Atra-5: 3.2 pt/A. Aatrex Nine-0, Accu-Pak (WDG), Drexel Atrazine 90DF, Riverside Atrazine 90 DF: 2.2 lb/A.

Cyanazine - controls annual grasses and broadleaf weeds.
Resistant bio-types of certain broadleaf weeds are known to occur and must be controlled by herbicide with a different mode of action.
Bladex 4L, Cy-Pro 4L: 2 pt/A.
Bladex 90DF, Cy-Pro 90DF: 1.1 lb/A.
May be tank-mixed with alachlor and atrazine. Pre-formulated mixtures may be available. Cannot be used after Dec. 31, 2002.

Metolachlor - controls annual grasses, yellow nutsedge, and certain broadleaf weeds.
Dual 8E or Dual II: 1.3-5 pt/A.
Dual IIG: 6-12 lb/A.
Dual II Magnum: 1-2 pt/A.
Cultivate or rotary hoe before weed emergence if rainfall or irrigation does not occur after application. Dual products can be tank-mixed with atrazine. Dual II contains an additive which enhances crop safety. Dual II Magnum is a purified form of metolachlor and can be used at reduced rates.

Dimethenamid - controls annual grasses, yellow nutsedge, and certain annual broadleaf weeds.
Frontier 6.0: 1-2 pt/A.
Rate selection within this range depends upon cation exchange capacity or soil texture and % organic matter. The 2 pt/A rate is required for maximum control of yellow nutsedge, seedling johnsongrass, and annual nightshades. Check the label for specific directions. Before application verify with your local seed company or supplier the selectivity of Frontier 6.0 on your specific varieties so as to avoid potential crop injury to sensitive varities. Do not apply if conditions of high rainfall, water saturated soil, or cool weather occur between the period from germination to corn emergence. Application during or prior to such conditions may result in delayed emergence or leaf wrapping. Frontier 6.0 can be tank-mixed with atrazine, cyanazine, Eradicane, or Basagran. Postemergence: Atrazine - controls annual broadleaf weeds.
Triazine resistant biotypes are known to occur and must be controlled by herbicides with a different mode of action. Maximum use rate in any year is 2.5 lb/A. Do not apply to ground to be planted to anything other than corn next year. Consult the label for precautionary statements to avoid ground and surface water contamination. Observe the following guidelines for use on highly erodible land. Apply before sweet corn reaches 12 inches in height, and before weeds reach 1.5 inches in height. Tank-mix with an emulsifiable oil or oil concentrate.

Highly erodible land with less than 30% residue cover:

AAtrex 4L, Drexel Atrazine 4L, Helena Atrazine 4L, Riverside Atrazine 4L, Wilbur-Ellis Atrazine 4 L: 3.2 pt/A. Drexel Atra-5: 2.4 pt/A. Aatrex Nine-0, Accu-Pak (WDG), Drexel Atrazine 90DF, Riverside Atrazine 90 DF: 1.8 lb/A.

Not highly erodible land or at least 30% residue cover:

AAtrex 4L, Drexel Atrazine 4L, Helena Atrazine 4L, Riverside Atrazine 4L, Wilbur-Ellis Atrazine 4 L: 4 pt/A. Drexel Atra-5: 3.2 pt/A. Aatrex Nine-0, Accu-Pak (WDG), Drexel Atrazine 90DF, Riverside Atrazine 90 DF: 2.2 lb/A.

Bentazon - controls annual broadleaf weeds and suppresses yellow nutsedge, Canada thistle, and field bindweed.
Basagran: 1.5-2 pt/A.
For nutsedge control use two applications approximately 2 weeks apart. Time of application depends on weed height and leaf-stage. Controls triazine resistant biotypes of lamb's quarters and pigweed. Can be tank-mixed with atrazine and a pre-formulated mix with atrazine (Laddox S-12) is also available.

Dimethenamid - controls annual grasses, yellow nutsedge, and certain annual broadleaf weeds.
Frontier 6.0: 1-2 pt/A.
Apply prior to weed emergence and on corn no more than 7 inches tall. Rate selection within the indicated range depends upon cation exchange capacity or soil texture and % organic matter. Check the label for specific directions. Before application verify with your local seed company or supplier the selectivity of Frontier 6.0 on your specific varieties so as to avoid potential crop injury to sensitive varieties. Do not apply if conditions of high rainfall, water saturated soil, or cool weather occur between the period from germination to corn emergence. Application during or prior to such conditions may result in delayed emergence or leaf wrapping. Frontier 6.0 can be tank-mixed with atrazine, cyanazine, Eradicane, or Basagran.

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