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Labeled Sunflower Treatments 2001

Sunday, April 1, 2001
filed under: Planting Systems

What’s Labeled in 2001

A Listing of Sunflower Seed Treatments, Herbicides, Insecticides

Following are labeled seed treatment, herbicide, and insecticide options available to sunflower producers as of March, 2001, courtesy of the North Dakota State University Extension Service.

These products are federally labeled for use on sunflower. However, growers in states other than North Dakota who may have questions regarding the appropriate use of any of these products are encouraged to contact their respective agronomists or university extension specialists.

Product listings are not meant to imply endorsement by The Sunflower or the National Sunflower Association. Users are reminded to follow label directions when applying any of these products.

More detailed sunflower product and pest information may be found on the NSA web site, Sunflower treatment information, along with production information for other crops, may also be found on the NDSU Extension web site,

University and extension service web sites for other leading sunflower producing states:

Colorado State University

Kansas State University

South Dakota State University

University of Minnesota

University of Nebraska


Disease Control 2

Chemical Application Seedling Blight 3 Downy Mildew Remarks


Captan 30 DD, 28.7% Slurry - No

Captan 400, 37.4 % Slurry - No

Nu-Gro Captan 4000,38.7% Slurry - No


Maxim 4FS, 40.3% Slurry E No For seed-borne and soil-borne fungi.


Apron XL LS, 32.34 % Slurry - F-E 4 For downy mildew control only.


Allegiance FL, 28.35 % Mist or slurry - F-E 4 Apron Dry Seed protectant is for drill box application to seed not previously treated with Apron-thorough mixing of fungicide and seed is essential for good control

Apron Dry Seed Protectant, 12.5% Drill Box (No) F-E 4


Anchor, 31% Liquid or slurry - F-E 4 For suppression of early season downy mildew. Use of lower rates (0.75-1.5 fl oz/cwt) controls Pythium seed rot and damping off. For use only by commercial seed treaters. Do not plant any crop not on Anchor label within 12 months of planting Anchor treated seed.


42-S Thiram, 42% Liquid or Slurry - No

2 P = Poor, F = Fair; G = Good; E = Excellent; () = Not registered for disease; No = No control

3 An increase in stand has been noted only once in moderately severe tests to date; under very severe conditions some increase in stand might be expected.

4 Provides excellent control of sensitive strains of downy mildew, but only fair control of insensitive strains, which are common.

BIOLOGICAL FUNGICIDE for Use as a Seed Treatment

Product Apply Disease Control Remarks

Bacillus subtilis

Kodiak 2.75% Drill box Root diseases of all crops Bacterium colonizes root system and competes with disease organisms that attack root systems.


Herbicide Weeds When to Apply Remarks and Paragraphs

Glyphosate Emerged grass and broadleaf weeds. Preplant or anytime prior to crop emergence. Non-selective, non-residual, systemic, foliar herbicide.

Apply with AMS fertilizer.

Refer to label for adjuvant use.

Paraquat Emerged annual grasses and broadleaf weeds Preplant or any time prior to crop emergence Non-selective, non-residual, foliar herbicide. Apply with nonionic surfactant (NIS) at 0.12 to 0.25% v/v. Good coverage is essential. A residual herbicide may be tank-mixed with paraquat.


(EPTC) Grass and some broadleaf weeds. Preplant incorporated; Fall PPI after Oct. 15 Weak on wild mustard.

PPI immediately after application. May be tank-mixed with Sonalan, or trifluralin to increase spectrum of weeds controlled.


(ethalfluralin) Grass and some broadleaf weeds PPI.


Fall: From Oct. 1 to Dec. 31. Poor wild mustard and wild oat control.

Adjust rate according to soil type. Use highest rate allowed for nightshade control.


Suppression (7.5 to 12.5 lbs 10G) For use in reduced or conservation tillage. Incorporate twice at 2 to 3 inches deep using a V-blade under-cutter or rotary hoe. For fall applications, incorporate once in the fall and once in the spring before seeding.


(ethalfluralin) +


(EPTC) Grass and some broadleaf weeds Preplant incorporated Adjust rate according to soil type and OM. PPI immediately after application. Poor on wild mustard.



(pendimethalin) Grass and some broadleaf weeds Preplant incorporated Poor on wild mustard and wild oat. Adjust rate according to soil type. May be tank-mixed with Eptam.

Grass and some broadleaf weeds Surface applied from 30 days prior to planting to immediately after planting. This treatment in no-till sunflowers only. Use lower rate only for coarse textured soil.

Grass and some broadleaf weeds Fall: PPI when soil temperature is less than 45 F Keep spring tillage depth shallower than fall tillage. May be tank-mixed with EPTC.

Trifluralin Grass and some broadleaf weeds Preplanted incorporated Poor wild mustard and wild oat control. PPI within 24 hours after application. May be tank-mixed with Eptam.

Fall: PPI after Sept. 1 or Spring

Trifluralin +


(EPTC) Grass and some broadleaves Preplant incorporated Enhances wild oat control and reduces potential carryover of trifluralin.



Section 18 registration

approved Annual small-seeded broadleaf weeds including kochia, pigweed, lambsquarters, nightshade, and biennial wormwood Early preplant, Preplant incorporated, or Preemergence Make EPP application up to 30 days prior to planting. Adjust rate to soil type. Requires precipitation for activation. Provide adequate furrow closure at planting. Temporary sunflower injury may occur in coarse, low organic matter soils with pH greater than 8.0. May give 6 to 8 weeks residual weed control.


(imazamethabenz) Wild mustard. Postemergence

Sunflower: Less than 8 leaves or 15 inches.

Wild mustard: Prior to bloom. Sunflower injury may occur when applied at high temperature and humidity. Apply with NIS at 0.25 % v/v.


(sethoxydim) Annual grasses Postemergence

Grass: 2 to 6 inches. Apply with oil adjuvant at 1 qt/A to actively growing weeds. Allow a 70 day preharvest interval.

Select, Prism



approved Annual grasses and quackgrass. Postemergence

Grass: 2 to 6 inches tall. Apply with oil adjuvant at 1qt/A to actively growing weeds. Allow a 70 day PHI.

Paraquat Desiccant Backside of sunflower heads yellow and bracts turning brown. Seed moisture content under 35% For use on confectionery and oilseed varieties. Apply with NIS. Randomly sample 10 average heads for seed moisture. Allow a 7-day PHI.

Drexel Defol

(sodium chlorate) Desiccant Same as above For use on confectionery and oilseed varieties. Thorough coverage of plant is essential. Apply aerially at 5 to 10 gpa or 20 to 30 gpa by ground sprayer.


Insect Insecticides

Banded Sunflower Moth

Economic threshold is about one moth per two plants Asana XL, Baythroid, Furadan 4F, Lorsban 4E, Scout X-TRA, Warrior

Sunflower Moth

Economic threshold, at onset of bloom, is one to two adults per five plants.

Asana XL, Baythroid, Endosulfan 3EC

(Phaser, Thiodan), Furadan 4F, Lorsban 4E, Methyl or ethyl parathion 8 EC, 6-3 parathion-methyl parathion, Scout X-TRA, Warrior

Sunflower Seed Weevil

Economic threshold is about 4 to 8 adults per plant (oil), and one to two per plant (confection). Treat for red weevils at R5.1 to R5.4 stage of plant development. Asana XL, Baythroid, Furadan 4F, Lorsban 4E, Methyl parathion 8EC, 6-3 parathion -methyl parathion, Scout X-TRA, Warrior

Sunflower Midge

There are no effective chemical controls currently recognized for this pest. The best management strategy has been rotation to crops other than sunflower in the vicinity of large infestations. Selecting hybrids for their ability to tolerate midge infestations should be considered when choosing seed.

Sunflower stem weevil

Economic threshold is one adult per three plants in late June to mid July Asana XL, carbaryl (Sevin), Furadan 4F, Lorsban 4E, Scout X-TRA, Warrior

Sunflower Beetle

Economic threshold is one to two adults or 10 to 12 larvae per plant. Asana XL, Baythroid, carbaryl (Sevin), Furadan 4F, Lorsban 4E, Scout X-TRA, Warrior


Economic threshold is one cutworm per square foot or 25-30% stand reduction. Asana XL, Lorsban 4E, Lorsban 15G, Carbaryl Sevin 20% bait Sevin XLR, Warrior


Threat when eight or more adults per square yard are present in the field, or when 20 or more are found in field margins. Asana XL, Furadan 4F, Lorsban 4E, 6-3-methyl parathion, carbaryl (Sevin), Scout X-TRA, Warrior


Lindane (seed treatment)

Economic threshold recommendations are according to NDSU. All of these insecticides are Restricted Use Pesticides except Lorsban 4E, Lorsban 15G, Endosulfan 3EC (Phaser, Thiodan), carbaryl (Sevin) and Lindane. Virtually all treatments have pre-harvest intervals, and many have posting and re-entry requirements—follow label instructions closely.

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