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Management of Insect and Mite Pests in Sorghum

Sorghum pests, if not controlled when thresholds are exceeded, will reduce yield and quality of grain and forage. Pesticides should not be used as a substitute for good agronomic practices or as “preventative insurance” because it is rarely economically or environmentally justifiable. Many sorghum pest problems can be avoided by implementing an Integrated Pest Management (IPM) plan that includes preventive pest management practices, such as planting high-quality, vigorous, Oklahoma-proven hybrid seed; planting it at the proper time for optimal health and yield, providing proper fertilization and weed control; and, when possible, keeping sorghum fields as far away as possible from wheat.

 

The information herein is for educational purposes only. Reference to commercial products or trade names is made with the understanding that no discrimination is intended and no endorsement by the Cooperative Extension Service is implied. 

 

Pesticide recommendations in this publication were correct as of the “Modified Date" but always check the label that came with the purchased insecticide for the most current rates and restrictions.

 

The first name listed is the trade name of a product registered for use in corn for the listed pest. The name in (parentheses) listed below the trade name is the name of the active ingredient. The active ingredient name is provided because in many cases, there are other registered products containing the same active ingredient that may cost less, so producers should compare prices. 

 

The number [in brackets] following a product is its Mode of Action number [MOA]. The more frequently insecticides with the same MOA are used, the more likely resistance will occur. This number provides an easy way to select different modes of action to avoid selecting for pests that are resistant to a certain mode of action. 

 

Refer to the following OSU publications for additional information.

 

Chinch bug

Chinch bug Planting Time    

Adults are 1/8 inch long, black with white wings that are folded over the back into an “hour glass” shape. Nymphs are reddish to brown, with a white stripe across their “shoulders”. 

Gaucho 600 [4A]

 

(imidacloprid)

6.4 fl oz/cwt seed

 

(0.25 lb ai/cwt seed)

Seed treatments will generally provide three weeks of suppression. Use seed treatment if sorghum has suffered regular losses from

Damage: Feed at base of plants, in between leaf sheath and stem. Chinch bugs often migrate from small grains to sorghum. Feeding may kill small seedlings.

Cruiser 5FS [4A]

 

(thiamethoxam)

5.1 to 7.6 fl oz/cwt seed

 

(0.2 to 0.3 lb ai/A)

chinch bug infestations. Do not feed leftover treated seed to livestock. Check table on last page for grazing and harvest restrictions for

Threshold: Two to three bugs per plant on seedlings. Treat if large numbers are moving in to sorghum from grain. A border spray 30 to 60 feet wide on the margins of the field may be of value if chinch bug numbers are high in an adjacent wheat field.

Poncho 600 [4A]

 

(clothianidin)

5.1 to 6.4 fl oz/cwt seed

 

(0.20 to 0.25 lb ai/A)

seed treatments.

     

Best control is obtained when insecticide is applied by ground, with nozzles directed at the base of the plants using a minimum of 20 to 30 gallons of water.

 

Post-Plant

   
 

Asana XL [3]

 

(esfenvalerate)

5.8 to 9.6 fl oz

 

(0.03 to 0.05 lb ai/A) lb ai/A)

Do not apply more than 0.15 lb ai/season. 21-day wait for grazing or harvest

 

Baythroid XL [3]

 

(beta-cyfluthrin)

1.3 to 2.8 fl oz

 

(0.010 to 0.022 lb ai/A)

1st and 2nd instar only; 14-day wait for grazing or harvest

 

Besiege [28,3]

 

(chlorantraniliprole + lambda-cyhalothrin)

6.0 to 10.0 fl oz

30-day wait for harvest

 

Blackhawk [5]

 

(spinosad)

1.5 to 3.3 fl oz

 

(0.034 to 0.094 lb ai/A)

14-day wait for grazing, 7 daysfor harvest

 

Concero [5,3]

 

(spinosad + gamma-cyhalothrin)

2 to 2.85 fl oz/Acre

 

(64 to 45 acres per gallon)

30-day wait for harvest or grazing

 

Delta Gold [3]

 

(deltamethrin)

1.0 to 1.5 fl oz

 

(0.012 to 0.018 lb ai/A)

14 day wait for grazing or harvest

 

Diamond 0.8 EC [15]

 

(novaluron)

9 to 12 fl oz

7-day wait for grazing, 14 daysfor grain; reapplication may beneeded.

 

Fastac EC [3] 

 

(alpha-cypermethrin)

 

(lambda-cyhalothrin) 

1.8 to 3.8 fl oz

(0.012 to 0.025 lb ai/A)

14-day PHI for harvest, 45-daywait for forage

 

Lannate LV [1A]

 

(methomyl)

0.75 to 1.5 pt

 

(0.225 to 0.45 lb ai/A)

14-day wait for grazing orharvest.

 

Mustang MAXX EC [3]

 

(zeta-cypermethrin)

1.76 to 4.0 fl oz

 

(0.011 to 0.025 lb ai/A)

14-day wait for harvest, 45 daysfor grazing.

 

Proaxis 0.5 CS [3]

 

(gamma-cyhalothrin)

2.56 to 3.84 fl oz

 

(0.01 to 0.015 lb ai/A)

30-day wait for grazing orharvest.

 

Corn earworm

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Corn earworm (Headworm)

   

Check labels, some state that product is only effective on very small (1st and 2nd instars) caterpillars

Up to 1 inch. Color varies from green to brown to yellow and pink.

Asana XL [3]

 

(esfenvalerate)

5.8 to 9.6 fl oz

 

(0.03 to 0.05 lb ai/A

Do not apply more than 0.15 lb ai/season. 21-day wait for grazing or harvest.

Damage: Feed in whorl and ripening seed in head. Yield loss from whorl feeding is negligible. Are capable of causing damage to seed in head until grain reaches soft dough stage.

Baythroid XL [3]

 

(beta-cyfluthrin)

1.3 to 2.8 fl oz

 

(0.010 to 0.022 lb ai/A)

1st and 2nd instar only; 14-day wait for grazing or harvest.

Threshold: Two or more larvae per head before hard dough. Open-headed varieties are less susceptible to attack than tight-headed varieties. A dynamic threshold that is based on plant population and crop value and control costs can determined by using the Glance-N-Go sorghum headworm smartphone application. See EPP-7191 Glance-N-Go Sampling Systems for Greenbugs, Sorghum (Sugarcane) Aphids, and Sorghum Headworms: Questions and Answers. 

Besiege [28,3]

 

(chlorantraniliprole + lambda-cyhalothrin)

6.0 to 10.0 fl oz

30-day wait for harvest.

 

Blackhawk [5]

 

(spinosad)

1.5 to 3.3 fl oz

 

(0.034 to 0.094 lb ai/A)

14-day wait for grazing, 7 days for harvest.

 

Concero [5,3]

 

(spinosad + gamma-cyhalothrin)

2 to 2.85 fl oz/Acre

 

(64 to 45 acres per gallon)

30-day wait for harvest or grazing

 

Delta Gold [3]

 

(deltamethrin)

1.0 to 1.5 fl oz

 

(0.012 to 0.018 lb ai/A)

14 day wait for grazing or harvest

 

Diamond 0.8 EC [15]

 

(novaluron)

3.5 to 7.5 fl oz

 

(0.045 to 0.098 lb ai/A)

1-day wait for harvest or grazing.

 

Delta Gold [3]

 

(deltamethrin)

1.0 to 1.5 fl oz

 

(0.012 to 0.018 lb ai/A)

14-day wait for grazing or harvest.

 

Diamond 0.8 EC [15]

 

(novaluron)

9 to 12 fl oz

7-day wait for grazing, 14 daysfor grain; reapplication may beneeded.

 

Fastac EC [3] 

 

(alpha-cypermethrin)

1.8 to 3.8 fl oz

 

(0.012 to 0.025 lb ai/A)

14-day PHI for harvest, 45-daywait for forage

 

Lannate LV [1A]

 

(methomyl)

0.75 to 1.5 pt

 

(0.225 to 0.45 lb ai/A)

14-day wait for grazing orharvest..

 

Mustang MAXX EC [3]

 

(zeta-cypermethrin)

1.76 to 4.0 fl oz

 

(0.011 to 0.025 lb ai/A)

14-day wait for harvest, 45 daysfor grazing.

 

Proaxis 0.5 CS [3]

 

(gamma-cyhalothrin)

2.56 to 3.84 fl oz

 

(0.01 to 0.015 lb ai/A)

30-day wait for grazing orharvest.

 

Sevin XLR [1A]

 

(carbaryl)

1 to 2 qt

 

(1 to 2 lb ai/A)

No wait for grazing, 21 days for harvest.

 

Vantacor [28]

 

(chlorantraniliprole)

1.2 to 2.5 fl oz

 

0.045 to 0.098 lb ai/A

1 day wait for harvest or grazing

 

Warrior II with Zeon [3]

(lambda-cyhalothrin )

1.28 to 1.92 fl oz

 

(0.02 to 0.03 lb ai/A)

30 day wait for harvest or grazing.

 

Corn leaf aphid

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Corn leaf aphid

Planting Time

Bluish-green, soft bodied aphid with black legs, antennae and cornicles Typically found in whorl.

Gaucho 600 [4A]

 

(imidacloprid)

6.4 fl oz/cwt seed

 

(0.25 lb ai/cwt seed)

Do not feed leftover treated seed to livestock. Check table on last page for grazing and harvest restrictions for seed treatments.

 

Research indicates that yield losses occur only where corn leaf aphids cause stand loss on seedling plants. Chemical treatments, including seed treatments, are not likely to reduce potential for infection by Maize Dwarf Mosaic Virus because it can be transmitted within 30 seconds after an aphid begins feeding. Texas research suggests that corn leaf aphids serve as a food source for lady beetles which can help prevent greenbug outbreaks.

Damage: Feed in whorl and may cause some delay of whorl emergence if numbers are high. Can mechanically transmit Maize Dwarf Mosaic virus disease.

Cruiser 5FS [4A]

 

(thiamethoxam)

5.1 to 7.6 fl oz/cwt seed

 

(0.2 to 0.3 lb ai/A)

Threshold: Corn leaf aphids rarely cause significant yield loss, so no thresholds have been established.

Poncho 600 [4A]

 

(clothianidin)

5.1 to 6.4 fl oz/cwt seed

 

(0.20 to 0.25 lb ai/A)

 

Post-Plant

 

Dimethoate 4E [1B]

 

(dimethoate)

 

0.5 to 1 pt

 

(0.25 to 0.5 lb ai/A)

28 day PHI
 

Sefina [9D]

 

(afidopyropen)

6 fl oz

 

(0.02 lb ai/A)

 

7 day wait for grazing, 14 days for grain or hay

 

Sivanto 200 SL [4D]

 

(flupyradifurone)

7.0 to 10.5 fl oz

 

(0.09 to 0.137 lb ai/A)

7 day wait for grazing, 14 days for grain or hay

 

Sivanto 200 SL [4D]

 

(flupyradifurone)

7.0 to 10.5 fl oz

 

(0.09 to 0.137 lb ai/A)

7 day wait for grazing, 21 days for harvest

 

Transform WD [4C]

 

(sulfoxaflor)

0.75-1.5 oz

 

0.023-0.047 lb ai/A

7-14 day PHI, check label for specifics. Do not spray less than 3 days before bloom, or until seed set.

 

Cutworms

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Cutworms

Asana XL [3]

 

(esfenvalerate)

5.8 to 9.6 fl oz

 

(0.03 to 0.05 lb ai/A)

Do not apply more than 0.15 lb ai/season. 21-day wait for grazing or harvest.

Robust caterpillars that “roll” up when disturbed, and prefer to live underground.

Baythroid XL [3]

 

(beta-cyfluthrin)

1.0 to 1.3 fl oz

 

(0.008 to 0.010 lb ai/A)

14-day wait for grazing or harvest.

Damage: Cutworms generally feed at night, and live under the soil during the day. Plants will be cut at or slightly above the soil level.

Besiege [28,3]

 

(chlorantraniliprole + lambda-cyhalothrin)

5.0 to 6.0 fl oz

30-day wait for harvest.

Threshold: Scout fields at seedling emergence. Treat when worms are less than ½ inch long, and skips are noticed.

Delta Gold [3]

 

(deltamethrin)

1.0 to 1.5 fl oz

 

(0.012 to 0.018 lb ai/A)

14 day wait for grazing or harvest

 

Diamond 0.8 EC [15]

 

(novaluron)

9 to 12 fl oz

7 day wait for forage, 14 days for grain, reapplication may be needed.

 

Fastac EC [3]

 

(alpha-cypermethrin)

1.3 to 3.8 fl oz

 

(0.008 to 0.025 lb ai/A)

14-day PHI for harvest, 45 PHI for grazing or forage.

 

Mustang MAXX EC [3]

 

(zeta-cypermethrin)

1.28 to 4.0 fl oz

 

(0.008 to 0.025 lb ai/A)

14-day wait for harvest, 45 days for grazing.

 

Proaxis 0.5 CS [3]

 

(gamma-cyhalothrin)

1.92 to 2.56 fl oz

 

(0.0075 to 0.01 lb ai/A)

30-day wait for grazing or harvest.

 

Warrior II with Zeon [3]
(lambda-cyhalothrin)

0.96 to 1.28 fl oz
(0.015 to 0.02 lb ai/A)

30-day wait for harvest or grazing.

 

Fall armyworm

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Fall armyworm (Headworm)

   

Check labels, some state that product is only effective on very small (1st and 2nd instars) caterpillars.

Large, striped, non-bristled caterpillar up to 1.5 inches. Has a light-colored inverted “Y” on head.

Baythroid XL [3]

 

(beta-cyfluthrin)

1.3 to 2.8 fl oz

 

(0.010 to 0.022 lb ai/A)

1st and 2nd instar only; 14 day wait for grazing or harvest

Damage: Feed in whorl, and ripening seed in head. Yield loss from whorl feeding is negligible. Can damage seed in head until grain reaches soft dough stage.

Blackhawk [5]

 

(spinosad)

1.5 to 3.3 fl oz)

 

(0.034 to 0.094 lb ai/A)

14 day wait for grazing, 7 days for harvest

Threshold: Two or more larvae per head before hard dough. Open-headed varieties are less susceptible to attack than tight-headed varieties. A dynamic threshold that is based on plant population and crop value and control costs can determined by using the Glance-N-Go sorghum headworm smartphone application. See EPP-7191 Glance-N-Go Sampling Systems for Greenbugs. Sorghum (Sugarcane) Aphids. and Sorghum Headworms: Questions and Answers.

Besiege [28,3]

 

(chlorantraniliprole + lambda-cyhalothrin)

6.0 to 10.0 fl oz

30 day wait for harvest

 

Concero [5,3]

 

(spinosad + gamma-cyhalothrin

2.85 fl oz/Acre

 

(45 acres per gallon)

30 day wait for harvest or grazing

 

Delta Gold [3]

 

(deltamethrin)

1.3 to 1.9 fl oz

 

(0.015 to 0.022 lb ai/A)

14 day wait for grazing or harvest

 

Diamond 0.8 EC [15]

 

(novaluron)

9 to 12 fl oz

7 day wait for grazing, 14 days for grain reapplication may be needed.

 

Fastac EC [3]

 

(alpha-cypermethrin)

1.8 to 3.8 fl oz

 

0.012 to 0.025 lb ai/A

14 day PHI for harvest, 45 days for grazing or forage

 

Intrepid 2F [18]

 

(methoxyfenozide)

8 to 10 fl oz

(0.12 to 0.16 lb ai/A)

21 day PIH for grain or stover harvest, 3 days for forage

 

Lannate LV[1A]

 

(methomyl)

0.75 to 1.5 pt

 

(0.225 to 0.45 lb ai/A)

14 day wait for grazing or harvest.

 

Mustang MAXX EC [3]

 

(zeta-cypermethrin)

1.76 to 4.0 fl oz

 

(0.011 to 0.025 lb ai/A)

14 day wait for harvest, 45 days for grazing.

 

Proaxisr 0.5 CS [3]

 

(gamma-cyhalothrin)

2.56 to 3.84 fl oz

 

(0.01 to 0.015 lb ai/A)

30 day wait for grazing or harvest.

 

Sevin XLR [1A]

 

(carbaryl)

1 to 2 qt

 

(1 to 2 lb ai/A)

No wait for grazing, 21 days for harvest.

 

Vantacor [28]

 

(chlorantraniliprole)

1.2 to 2.5 fl oz

 

(0.045-0.098 lb ai/A)

1 day wait for harvest or grazing

 

Warrior II with Zeon [3]

 

(lambda-cyhalothrin)

1.28 to 1.92 fl oz

 

(0.02 to 0.03 lb ai/A)

30 day wait for harvest or grazing.

 

False chinch bug

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

False chinch bug

Baythroid XL [3]

 

(cyfluthrin)

1.3 to 2.8 fl oz

 

(0.010 to 0.022 lb ai/A)

14-day wait for grazing or harvest.

Adults 1/8 inch long, dirty gray, with brown or black markings and piercing mouthparts.

Diamond 0.8 EC [15]

 

(novaluron)

9 to 12 fl oz

7-day wait for grazing, 14 days for grain reapplication may be needed.

Damage: Feed in groups. Large numbers may cause wilting of heads or small plants.

Fastac EC [3]

 

(alpha-cyhalothrin)

3.2 to 3.9 fl oz

 

(0.02 to 0.025 lb ai/A)

14-day PHI for harvest, 45 days for grazing or forage.

Threshold: 140 or more per head.

Mustang MAXX EC [3]

 

(zeta-cypermethrin)

3.2 to 4.0 fl oz

 

(0.02 to 0.025 lb ai/A)

14-day wait for harvest, 45 days for grazing.

 

Grasshopper

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Grasshopper

Baythroid XL [3]

 

(beta-cyfluthrin)

2 to 2.8 fl oz

 

(0.019 to 0.022 lb ai/A)

14-day wait for grazing or harvest.

1 to 2 inches, outer wings leathery, inner wings clear or colored. Enlarged hind legs designed for jumping.

Coragen [28]

 

(chlorantraniliprole)

2.0 to 5.0 fl oz

(0.026 to 0.065 lb ai/A

1 day wait for harvest or grazing

Damage: Chew leaves, leaving ragged edges or completely chew leaf blade. Damage emerging seed heads causing yield loss.

Delta Gold [3]

 

(deltamethrin)

1.0 to 1.5 fl oz

 

(0.012 to 0.018 lb ai/A)

14 day wait for grazing or harvest

Threshold: 15 to 20 per square yard. If nymph populations exceed threshold field borders (25 to 40 per square yard), treat before they move into sorghum.

Dimethoate 4E [1B]

 

(dimethoate)

1 pt

 

(0.5 lb ai/A )

Only one post-plant application per season.

These products are or application in sorghum; See EPP-7196: Grasshopper Management in Rangeland, Pastures, and Crops for treating non-crop areas.

Fastac EC [3]

 

(alpha-cyhalothrin)

3.2 to 3.9 fl oz

 

(0.02 to 0.025 lb ai/A)

14 day PHI for harvest, 45 days for grazing or forage

 

Mustang MAXX EC [3]

 

(zeta-cypermethrin)

3.2 to 4.0 fl oz

 

(0.02 to 0.025 lb ai/A)

14 day wait for harvest, 45 days for grazing.

 

Proaxis 0.5 CS [3]

 

(gamma-cyhalothrin

2.56 to 3.84 fl oz

 

(0.01 to 0.015 lb ai/A)

30 day wait for grazing or harvest.

 

Warrior II with Zeon [3]

 

(lambda-cyhalothrin)

1.28 to 1.92 fl oz

 

(0.02 to 0.03 lb ai/A)

30 day wait for harvest or grazing.

 

Greenbug

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Greenbug

Seed Treatment

 

 

Lime-green, soft-bodied aphid with darker green stripe down back. Tips of legs, cornicles, and most of antennae are black.

Attendant 600 [4A]

 

(imidacloprid)

6.4 fl oz/cwt seed

 

(0.25 lb ai/cwt seed)

 

Damage: Injury can occur anytime from seedling emergence through soft dough stage. Greenbug feeding causes reddening of leaves which die as populations increase.

Cruiser 5FS [4A]

 

(thiamethoxam)

5.1 to 7.6 fl oz/cwt seed

 

(0.2 to 0.3 lb ai/A)

 

Threshold: See Thresholds listed at end of publication. Need to treat is dependent upon greenbug numbers, plant size, variety, growing conditions, and the presence of predators and parasites. It is better to base treatment decision on presence of plant damage than on greenbug numbers alone.

Poncho 600 [4A]

 

(clothianidin)

5.1 to 6.4 fl oz/cwt seed

 

(0.20 to 0.25 lb ai/A)

 
 

Planting Time

   
 

Counter 15G [1B]


“Lock ‘n Load” or “Smartbox” applicator needed


Do not place granules in contact with seed. 50-day wait for grazing, 100 days for harvest.

 

Post-Plant

   
 

Dimethoate 4E [1B]

 

(dimethoate)

0.5 to 1 pt

 

(0.25 to 0.5 lb ai/A)

28-day wait for harvest or grazing.

 

Fastac EC [3]

 

(alpha-cyhalothrin)

3.2 to 3.9 fl oz

 

(0.02 to 0.025 lb ai/A)

14-day PHI for harvest, 45 days for grazing or forage.

 

Malathion 5E [1B]

 

(malathion)

1.5 pt

 

(0.93 lb ai/A)

7-day PHI for grain. Do not feed or graze forage, hay or straw to livestock.

 

Sivanto 200 SL [4D]

 

(flupyradifurone)

7.0 to 10.5 fl oz

 

(0.09 to 0.137 lb ai/A)

7-day wait for forage, 21 days for harvest.

 

Lesser cornstalk borer

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Lesser cornstalk borer

Concero [5,3]

 

(spinosad + gamma-cyhalothrin)

2 to 2.85 fl oz/Acre

 

(64 to 45 acres per gallon)

30-day wait for harvest or grazing.

Caterpillar ¾-inch long when mature. Slender, blue-green with brown bands around each body segment. Make silken tunnels at feeding site.

Delta Gold [3]

 

(deltamethrin)

1.3 to 1.9 fl oz

 

(0.015 to 0.022 lb ai/A)

14-day wait for grazing or harvest.

Damage: Tunnels in roots and stems. Occurs in May through June.

Fastac EC [3]

 

(alpha-cyhalothrin)

3.2 to 3.9 fl oz

 

(0.02 to 0.025 lb ai/A)

14-day PHI for harvest, 45 days for grazing or forage.

Threshold: Treat before larva bore into stalk.

Mustang MAXX EC [3]

 

(zeta-cypermethrin)

3.2 to 4.0 fl oz

 

(0.02 to 0.025 lb ai/A)

14-day wait for harvest, 45 days for grazing.

 

Proaxis 0.5 CS [3]

 

(gamma-cyhalothrin)

2.56 to 3.84 fl oz

 

(0.01 to 0.015 lb ai/A)

30-day wait for grazing or harvest.

 

Warrior II with Zeon [3]
(lambda-cyhalothrin)

1.28 to 1.92 fl oz
(0.02 to 0.03 lb ai/A)

30-day wait for harvest or grazing.

 

Sorghum (Sugarcane) aphid

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Sorghum (Sugarcane) aphid

Planting Time

 

 

Whitish to light yellow, soft bodied aphid. Tips of legs, cornicles, and most of antennae are black. Colonies occur on underside of leaves, starting from the lower leaves.

Cruiser 5FS [4A]

 

(thiamethoxam)

5.1 to 7.6 fl oz/cwt seed

 

(0.2 to 0.3 lb ai/A)

Check table on last page for grazing and harvest restrictions for seed treatments.

 

Post-Plant    

Damage: Injury can occur anytime from seedling emergence through harvest, but is more likely to occur from boot through soft dough. Heavy feeding causes early leaf senescence and reduces seed fill. Aphids produce large amounts of honeydew, which can affect harvest operations.

*Dimethoate 4E [1B]

 

(dimethoate

0.5 to 1 pint

 

(0.25 to 0.5 lb ai/A)

*moderately effective, 28 day waiting period

Threshold: Threshold is based on price of grain, control costs and resistance level of the sorghum hybrid. Use the Glance-N-Go sampling app to determine threshold, and use it for sampling. See EPP-7191 Glance-N-Go Sampling Systems for Greenbugs, Sorghum (Sugarcane) Aphids, and Sorghum Headworms: Questions and Answers.

Sefina [9D]

 

(afidopyropen)

6.0 fl oz

 

(0.02 lb ai/A)

7 day wait for grazing, 14 day for grain and hay.

 

Sivanto Prime [4D]

 

(flupyradifurone)

4.0 to 7.0 fl oz

 

(0.05 to 0.09 lb ai/A)

7-day wait for grazing, 14 days for grain harvest or hay.

 

Transform WD [4C]

 

(sulfoxaflor)

0.75 to 1.5 oz

 

(0.023 to 0.047 lb ai/A)

7-14 day PHI, check label for specifics. Do not spray less than 3 days before bloom, or until seed set.

 

Sorghum midge

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Sorghum midge

   

Check labels. May need to apply a second treatment 3-5 days after first. Uniform planting date is an option for management.

Tiny, fragile orange-bodied fly that is active in early to mid-morning.

Asana XL [3]

 

(esfenvalerate)

2.9 to 5.8 fl oz

 

(0.015 to 0.03 lb ai/A)

Do not apply more than 0.15 lb ai/season. 21-day wait for grazing or harvest.

Damage: Damaged heads appear to be “blasted” or “blighted” from high temperatures, infertility, or drought. Damage from sorghum midge generally restricted to sorghum that blooms after August 15.

Baythroid XL [3]

 

(beta-cyfluthrin)

1.0 to 1.3 fl oz

 

(0.008 to 0.010 lb ai/A)

14-day wait for grazing or harvest.

Threshold: Check fields before 11 am, when flies are most active. Treat when 25 to 30% of heads have begun bloom and adults average one or more per head.

Blackhawk [5]

 

(spinosad)

1.5 to 3.3 fl oz

 

(0.034 to 0.094 lb ai/A)

14-day wait for grazing, 7 days for harvest.

 

Delta Gold [3]

 

(deltamethrin)

1.3 to 1.9 fl oz

 

(0.015 to 0.022 lb ai/A)

14-day wait for grazing or harvest.

 

Diamond 0.8 EC [15]

 

(novaluron)

9 to 12 fl oz

7-day wait for grazing, 14 days for grain reapplication may be needed.

 

Fastac EC [3]

 

(alpha-cypermethrin)

1.3 to 3.8 fl oz

 

(0.008 to 0.025 lb ai/A)

14-day wait for harvest, 45 days for grazing or forage.

 

Lannate LV [1A]

 

(methomyl)

0.75 to 1.5 pt

 

(0.225 to 0.45 lb ai/A)

14-day wait for grazing or harvest.

 

Mustang MAXX [3]

 

(zeta-cypermethrin)

1.28 to 4.0 fl oz

 

(0.008 to 0.025 lb ai/A)

14-day wait for harvest, 45 days for grazing.

 

Proaxis 0.5 CS [3]

 

(gamma-cyhalothrin)

1.92 to 2.56 fl oz

 

(0.0075 to 0.01 lb ai/A)

30-day wait for grazing or harvest.

 

Warrior II with Zeon [3]
(lambda-cyhalothrin)

0.96 to 1.28 fl oz
(0.015 to 0.02 lb.)

30-day wait for grazing or harvest.

 

Sorghum webworm

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Sorghum webworm

Baythroid XL [3]

 

(beta-cyfluthrin)

1.3 to 2.8 fl oz

 

(0.010 to 0.022 lb ai/A)

14-day wait for grazing or harvest.

Fuzzy, reddish to brown worms in head.

Besiege [28,3]

 

(chlorantraniliprole + lambda cyhalothrin)

6.0 to 10.0 fl oz

30-day wait for harvest.

Damage: Caterpillars feed on the seed, and hollow it out. Open-headed varieties are less susceptible than tight-headed varieties to attack.

Blackhawk [5]
(spinosad)

1.5 to 3.3 fl oz
spinosad) (0.034 to 0.094 lb.)

14-day wait for grazing, 7 days for harvest.

Threshold: 5 or more larvae per head before hard dough stage.

Delta Gold [3]

 

(deltamethrin)

1 to 1.5 fl oz

 

(0.012 to 0.018 lb ai/A)

14-day wait for grazing or harvest.

 

Diamond 0.8 EC [15]

 

(novaluron)

9 to 12 fl oz

7-day wait for grazing, 14 days for grain reapplication may be needed.

 

Fastac EC [3]

 

(alpha-cypermethrin)

1.8 to 3.8 fl oz

 

(0.012 to 0.025 lb ai/A)

14-day PHI for harvest, 45 day for grazing or forage.

 

Mustang MAXX EC [3]

 

(zeta-cypermethrin)

1.76 to 4.0 fl oz

 

(0.011 to 0.025 lb ai/A)

 

 

14-day wait for harvest, 45 days for grazing.

 

Proaxis 0.5 CS [3]

 

(gamma-cyhalothrin)

2.56 to 3.84 fl oz

 

(0.01 to 0.015 lb ai/A)

30-day wait for grazing or harvest.

 

Vantacor [28]

 

(chlorantraniliprole)

1.2 to 2.5 fl oz

 

(0.045 to 0.098 lb ai/A)

1 day wait for harvest or grazing

 

Warrior II with Zeon [3]
(lambda-cyhalothrin)

1.28 to 1.92 fl oz
(0.02 to 0.03 lb.)

30-day wait for grazing or harvest.

 

Southwestern corn borer

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Southwestern corn borer

Baythroid XL [3]

 

(cyfluthrin)

1.3 to 2.8 fl oz

 

(0.010 to 0.022 lb ai/A)

14-day wait for grazing or harvest.

Full grown caterpillars are white with prominent dark spots on body.

Besiege [28,3]

 

(chlorantraniliprole + lambda cyhalothrin)

6.0 to 10.0 fl oz

30-day wait for harvest.

Damage: Tunnels throughout stalk. May girdle mature stalks.

Blackhawk [5]

 

(spinosad)

1.5 to 3.3 fl oz

 

(0.034 to 0.094 lb ai/A)

14-day wait for grazing, 7 days for harvest.

Threshold: Chemical control usually not warranted.

Concero [5,3]

 

(spinosad + gamma-cyhalothrin)

2 to 2.85 fl oz

30-day wait for harvest or grazing.

 

Fastac EC[3]

 

(alpha-cypermethrin)

1.8 to 3.8 fl oz

 

(0.012 to 0.025 lb ai/A)

14-day PHI for harvest, 45 days for grazing or forage.

 

Intrepid 2F [18]

 

(methoxyfenozide)

8 to 10 fl oz

 

(0.12 to 0.16 lb ai/A)

21-day PIH for grain or stover harvest, 3 days for forage.

 

Mustang MAXX EC [3]

 

(zeta-cypermethrin)

1.76 to 4.0 fl oz

 

(0.011 to 0.025 lb ai/A)

14-day wait for harvest, 45 days for grazing.

 

Proaxis 0.5 CS [3]

 

(gamma-cyhalothrin)

2.56 to 3.84 fl oz

 

(0.01 to 0.015 lb ai/A)

30-day wait for grazing or harvest.

 

Sevin XLR [1A]

 

(carbaryl)

1.5 quarts

 

(1.5 lb ai/A)

No wait for grazing, 21 days for harvest.

 

Warrior II with Zeon [3]
(lambda-cyhalothrin)

1.28 to 1.92 fl oz
(0.02 to 0.03 lb.)

30-day wait for grazing or harvest.

 

Spidermites

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Spidermites

Post-Plant

   

Small, less than 1/100-inch long. Cause brown stippling of leaves.

Comite II [14]

 

(propargite)

24 to 36 fl oz

 

(1.125 to 1.6875 lb ai/A)

30-day wait for grazing, 60 days for harvest.

Damage: Causes stippling of leaves; severe infestations can kill leaves.

Dimethoate 4E [1B]

 

(dimethoate)

1 pt

 

(0.5 lb ai/A)

Only one post-plant application per season.

Threshold: No threshold established. Treat if majority of plants are infested with large, increasing mite infestations. Control is not be justified after head reaches hard dough stage.

Onager [10A)

 

(hexythiazox)

10 to 24 fl oz

 

(0.078 to 0.1875 lb ai/A)

30-day waiting period for harvest, do not graze.

 

Sugarcane aphid

Pest, Damage and Treatment Threshold
Sugarcane aphid
Insecticide, Formulation, [MOA Group] & (Active Ingredient)
Planting Time
Rate of Product (or AI) per Acre Comments

Whitish to light yellow, soft bodied aphid. Tips of legs, cornicles, and most of antennae are black. Colonies occur on underside of leaves, starting from the lower leaves.

Cruiser 5FS [4A]

 

(thiamethoxam)

5.1 to 7.6 fl oz/cwt seed

 

(0.2 to 0.3 lb ai/A)

Check table on last page for grazing and harvest restrictions for seed treatments.

Damage: Injury can occur anytime from seedling emergence through harvest, but is more likely to occur from boot through soft dough. Heavy feeding causes early leaf senescence and reduces seed fill. Aphids produce large amounts of honeydew, which can affect harvest operations.

Post-Plant

   

Threshold: Economic injury levels have not yet been determined. Treat if 20% of plants are infested with 50 to 125 aphids per leaf before head emergence, or when 30% are infested with 50 to 125 aphids after head emergence.

*Dimethoate 4E [1B]

 

(dimethoate)

0.5 to 1 pint

 

(0.25 to 0.5 lb ai/A)

*moderately effective, 28-day waiting period.

 

Sivanto Prime [4D]

 

(flupyradifurone)

4.0 to 7.0 fl oz

 

(0.05 to 0.09 lb ai/A)

7-day wait for grazing, 14 days for grain harvest or hay.

 

Transform WD [4C]

 

(sulfoxaflor)

0.75 to 1.5 oz

 

(0.023 to 0.047 lb ai/A)

7-day waiting for grazing, 14 days for harvest. Do not spray less than 3 days before bloom, or until seed set. (Section 18 emergency use registration, expires 11/30/2017).

 

White grub

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

White grub

NA

NA

No insecticide is currently registered for white grub control. Re-planting may be the best option.

Large, “C” shaped grub with a white body and a brown head.

     

Damage: Grubs feed on roots of seedling plants. Damage potential dependent on planting date and speed of growth of the plant.

     

Threshold: No treatment is available. An average of one grub per square foot may cause stand loss.

     

 

Wireworm

Pest, Damage and Treatment Threshold Insecticide, Formulation, [MOA Group] & (Active Ingredient) Rate of Product (or AI) per Acre Comments

Wireworm

Seed Treatment

 

 

Hard-shelled, smooth, cylindrical, yellowish to brown worms. 2-6 year life cycle. More common in sorghum planted into a sod or grass pasture.

 

Gaucho 600 [4A]

 

(imidacloprid)

6.4 fl oz/cwt seed

 

(0.25 lb ai/cwt seed)

Do not feed leftover treated seed to livestock. Check table on last page for grazing and harvest restrictions for seed treatments.

 

Damage: Feed on seed, seedling. Cause stunting and stand loss.

Cruiser 5FS [4A]

 

(thiamethoxam)

5.1 to 7.6 fl oz/cwt seed

 

(0.2 to 0.3 lb ai/A)

 
 

Poncho 600 [4A]

 

(clothianidin)

5.1 to 6.4 fl oz/cwt seed

 

(0.20 to 0.25 lb ai/A)

 
 

Planting Time

   

Threshold: Seed treatments are available. Treat if field history indicates a problem.

*Counter 15G [1B]

Apply per label.

* Counter 15 G can be used as a planting time treatment except in the Panhandle, but it requires a “Smartbox“ or “Lock ‘n Load” applicator, and has the potential to damage plants, and interact with several ALS-inhibiting herbicides. Check label for restrictions.

 

Asana XL 21-day PHI

Batallion/Delta Gold

14-day wait for grazing or harvest

Baythroidr XL

14-day PHI, 14 days grazing

Besiege

30-day PHI for harvest

Blackhawk

7-day PHI for harvest, 14 days for grazing

Comite II

30-day PHI for silage, 60 days for grain harvest.

Concero

30-day PHI

Coragen

1-day PHI for harvest or grazing

Counterr 15G

100-day PHI for grain, 50 days for grazing

Cruiserr 5FS

no grazing restriction

Diamond 0.8 EC

7-day wait for grazing, 14 days for grain

Dimethoate

28-day PHI for grain or grazing, do not apply after heading.

Fastac

14-day PHI for harvest, 45-day PHI for forage/grazing

Lannate

14-day PHI for harvest or grazing

Lorsban 4E

30- to 60-day PHI for harvest or grazing, depending on rate applied.

Malathion

7-day PHI for grain. Do not feed or graze forage, hay or straw to livestock.

Mustang MAXX EC

14-day PHI for harvest, 45 days for grazing

Onager

30-day PHI for harvest, do not graze.

Poncho

no grazing restriction

Proaxis

30-Day PHI for harvest or grazing

Sevin XLR

21-day PHI for harvest, 0 days for forage.

Sivanto

14-day PHI for harvest, 7 days for forage

Transform WD

14 day PHI for harvest, 7 days for forage

Warrior II with Zeon 30-day PHI for harvest or grazing

 

* MOA group numbers in brackets [#] following the insecticide name are used to designate the mode of action of the insecticide according to the classification system developed by the Insecticide Resistance Action Committee, (IRAC) in 2011. It is intended to help in the selection of insecticides for preventative resistance management. If you make multiple applications for a specific pest during a growing season, simply select a registered insecticide with a different number for each application. To further delay resistance from developing, integrate other control methods into your pest management programs.

Plant Size When to Treat When to Treat
 

Texas thresholds

Kansas thresholds

0 to 1-leaf stage

20% of plants visibly damaged

25 to 50 greenbugs per plant

3-leaf stage

20% of plants visibly damaged

50 to 100 greenbugs per plant

5-leaf stage

Visible damage on leaves, (red spots, yellow leaves) but before any entire leaves are killed on 20% of plants

150 to 300 greenbugs per plant

Mid-whorl stage

Visible damage on leaves (red spots yellow leaves), but before any entire leaves are killed on 20% of plants

300 to 600 greenbugs per plant

Boot to heading

Death of one functional leaf

700 to 1,000 greenbugs per plant

Heading through soft dough

Death of two functional leaves

700 to 1,000 greenbugs per plant

*The pesticide information presented in this publication was current with federal and state regulations at the time of revision. READ and FOLLOW all LABEL directions.

 

Tom A. Royer

Extension Entomologist

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