Appendix
Table A1. Suggested insecticides for controlling white grubs | |||
Insecticide (listed alphabetically) |
Amount per 1,000 feet of row |
Amount per acre on 40-inch row spacing |
IRAC group |
Chlorethoxyfos + bifenthrin |
1B |
||
(SmartChoice 5G) (SmartChoice HC) | 3 .0–3 .5 oz 1 .0–1 .67 oz |
2 .6–3 .0 lb 0 .8–1 .4 lb |
|
Chlorpyrifos (Lorsban® 15G) |
8 .0 oz |
6 .5 lb |
1B |
(Nufos® 15G) |
8 .0 oz |
6 .5 lb |
|
Tefluthrin (Force® 3G) |
4–5 oz |
3 .3–4 .1 lb |
3A |
Terbufos (Counter® 20G) |
6 .0 oz |
4 .9 lb |
1B |
(Counter® 15G) |
8 .0 oz |
6 .5 lb |
|
Remarks Chlorethoxyfos + bifenthrin: Apply in furrow only, not banded . Chlorpyrifos: Chlorpyrifos 15G is not labeled for band application . Must be in- furrow or T-band Tefluthrin: Apply as banded, T-band, or in-furrow . Terbufos: Read the supplemental label for information on potential crop damage if used in combination with some herbicides . Banded or in-furrow application only . |
Table A2. Suggested insecticides for controlling wireworms | |||
Insecticide (listed alphabetically) |
Amount per 1,000 feet of row |
Amount per acre on 40-inch row spacing |
IRAC group |
Chlorethoxyfos + bifenthrin |
1B |
||
(SmartChoice 5G) (SmartChoice HC) | 3 .0–3 .5 oz 1 .0–1 .67 oz |
2 .6–3 .0 lb 0 .8–1 .4 lb |
|
Chlorpyrifos (Lorsban® 15G) |
8 .0 oz |
6 .5 lb |
1B |
(Nufos® 15G) |
8 .0 oz |
6 .5 lb |
|
Tefluthrin (Force® 3G) |
4–5 oz |
3 .3–4 .1 lb |
3A |
Terbufos (Counter® 20G) |
6 .0 oz |
4 .9 lb |
1B |
(Counter® 15G) |
8 .0 oz |
6 .5 lb |
|
Remarks Chlorethoxyfos + bifenthrin: Apply only in furrow, not banded . Chlorpyrifos: Chlorpyrifos 15G is not labeled for band application . Must be in- furrow or T-band . For best control of wireworms, apply as an in-furrow treatment . Consider using an insecticidal seed treatment with T-band applications . Tefluthrin: Apply as banded, T-band, or in-furrow . Terbufos: Read the supplemental label for information on potential crop damage if used in combination with some herbicides . |
Table A3. Suggested Bt technology for controlling Mexican and western corn rootworms | ||
Technology | Rootworm toxin(s) | Caterpillar toxin(s) |
Agrisure 3000GT, 3011A | mCry3A | Cry1Ab |
Agrisure Viptera 3111 | mCry3A | Cry1Ab + Vip3A |
Agrisure 3122 | mCry3A + Cry34/35Ab1 | Cry1Ab + Cry1F |
Agrisure Duracade 5122 | mCry3A + eCry3 .1Ab | Cry1Ab + Cry1F |
Agrisure Duracade 5222 | mCry3A + eCry3 .1Ab | Cry1Ab + Cry1F + Vip3A |
Herculex RW (HXRW) | Cry34/35Ab1 | none |
Herculex XTRA (HXX) | Cry34/35Ab1 | Cry1F |
Optimum TRIsect | mCry3A | Cry1F |
Optimum Intrasect XTra | Cry34/35Ab1 | Cry1F + Cry1Ab |
Optimum Intrasect XTreme | mCry3A + Cry34/35Ab1 | Cry1F + Cry1Ab |
Optimum AcreMax RW | Cry34/35Ab1 | none |
Optimum AcreMax1 (AM1) | Cry34/35/Ab1 | Cry1F |
Optimum AcreMax TRIsect | mCry3A | Cry1F + Cry1Ab |
Optimum AcreMax Xtra | Cry34/35Ab1 | Cry1F + Cry1Ab |
Optimum AcreMaxXTrem | mCry3A + Cry34/35Ab1 | Cry1F + Cry1Ab |
YieldGard VT Rootworm | Cry3Bb1 | none |
YieldGard VT Triple | Cry3Bb1 | Cry1Ab |
Genuity VT Triple PRO | Cry3Bb1 | Cry1A .105 + Cry2Ab2 |
Genuity SmartStax | Cry3Bb1 + Cry34/35Ab1 | Cry1A .105 + Cry2Ab2 + Cry1F |
Mycogen SmartStax | Cry3Bb1 + Cry34/35Ab1 | Cry1A .105 + Cry2Ab2 + Cry1F |
Table A4. Suggested seed treatments for controlling Mexican and western corn rootworms | ||
Seed treatment | Application rate |
IRAC group |
Clothianidin (Poncho 600 at the 1 .25 mg ai/seed rate of Poncho 600) |
4A |
|
Apply 1 .25 mg ai/seed or 5 .64 fl . oz per 80,000 unit of seed | ||
Imidacloprid (Gaucho 600) |
4A |
|
For Gaucho 600 apply 1 .34 mg ai/seed or 6 .0 oz per 80,000 unit of seed . | ||
Thiamethoxam (Cruiser 5FS) |
4A |
|
Apply 1 .25 mg of active ingredient per kernel . Each fluid ounce contains 17 .7 grams of active ingredient . | ||
Thiamethoxam + abamectin (Avicta Complete Corn 250 and 500; Avicta Duo and Dou 250 Corn) |
4A 6 |
|
For corn rootworm, must be tank mixed with Cruiser 5FS . See label for rates . Must be applied only in Syngenta-certified seed treatment facilities . |
||
Note: Shat seed treatments are insufficient to control heavy rootworm populations . Remarks Seed treatments protect roots adequately if the infestations are light or moderate . However, granular insecticides and Bt transgenic hybrids control large rootworm infestations better . Clothianidin: For use in commercially available equipment designed for seed treatment only . Not for use in hopper-box, slurry box, or similar seed treatment applications used at planting . Imidacloprid: May be applied by commercial seed treatment facilities, end use at agricultural establishments, or immediately before planting . Thiamethoxam: Consult your Syngenta seed treatment representative for recommendations on slurry additives to use during applications of Cruiser 5FS . Follow the planter manufacturer’s recommendations for using talc, graphite, or other hopper box addi- tives at planting . |
Table A5. Suggested granular and liquid insecticides for controlling Mexican and western corn rootworm larvae | |||
Insecticide (listed alphabetically) |
Amount per 1,000 feet of row |
Amount per acre on 40-inch row spacing |
IRAC group |
Chlorethoxyfos + bifenthrin |
1B |
||
(SmartChoice 5G) (SmartChoice HC) | 4 .5–5 .0 oz 1 .5–1 .67 |
3 .9–4 .3 lb 1 .2–1 .4 lb |
|
Chlorpyrifos (Lorsban® 15G) |
8 .0 oz |
6 .5 lb |
1B |
(Nufos® 15G) (Lorsban® 4E or Advanced) (Nufos 4E) |
8 .0 oz |
6 .5 lb 2 pt per acre 2 .0 pt per acre |
|
Tefluthrin (Force® 3G) |
4 .0–5 .0 oz |
3 .3–4 .1 lb |
3A |
Terbufos (Counter® 20G) |
6 .0 oz |
4 .9 lb |
1B |
(Counter® 15G) |
8 .0 oz |
6 .5 lb |
|
Chlorethoxyfos + bifenthrin: Apply only in furrow, not banded . Chlorpyrifos: Chlorpyrifos is not effective on Mexican corn rootworm in high-pH soils in South Texas . Nufos 15G and 4E do not list Mexican corn rootworm as a pest controlled . Granules are not labeled for band application . Must be in-furrow or T-band . Liquid formulation must be applied by T-band application only . Applica- tions made using a band width less than 5–6 inches may cause phytotoxicity under certain environmental conditions such as cool temperatures, wet conditions, and light soils . Lorsban 4E and Nufos can be chemigated to control corn rootworm larvae Tefluthrin: See the label for application and timing instructions . Terbufos: Read the supplemental label for information on potential crop damage if used in combination with some herbicides . PRECAUTION: Certain sulfonylurea herbicides and organophosphate insecticides used in the same crop year on corn may injure the crop severely . Please read pesti- cide labels carefully . IMPORTANT: Using the same soil insecticides year after year in the same field is not a good practice . For best results, rotate organophosphate (chlorpyrifos, terbufos) with other (tefluthrin) soil insecticides each year . For all band applications, apply in a 6- to 8-inch band just behind seed drop and in front of covering shovels and press wheel or chain drag . Soil incorporation to about 1 inch deep is important . |
Table A6. Suggested seed treatments for controlling southern corn rootworm | ||
Seed treatment | Application rate |
IRAC group |
Clothianidin (Poncho 600 and Poncho 1250, the 1 .25 mg ai/seed rate of Poncho 600) |
4A |
|
For Poncho 600, apply 1 .25 mg ai/seed or 5 .64 fl oz per 80,000 unit of seed . | ||
Imidacloprid (Gaucho 600) |
4A |
|
For Gaucho 600 apply 1 .34 mg ai/seed or 6 .0 oz per 80,000 unit of seed . | ||
Thiamethoxam (Cruiser 5FS) |
4A |
|
Apply 1 .25 mg of active ingredient per kernel . Each fluid ounce contains 17 .7 grams of active ingredient . | ||
Thiamethoxam + Abamectin (Avicta Complete Corn 250 and 500; Avicta Duo and Dou 250 Corn) |
4A 6 |
|
For corn rootworm, must be tank mixed with Cruiser 5FS . See label for rates . Must be applied only in Syngenta-certified seed-treatment facilities . |
||
Note: Seed treatments are insufficient to control heavy rootworm populations . Remarks Seed treatments protect the roots adequately if the infestations are light or moderate . However, granular insecticides and Bt trans- genic hybrids control under high rootworm infestations better . Clothianidin: For use in commercially available equipment designed for seed treatment only . Not for use in hopper-box, slurry box, or similar seed treatment applications used at planting . Imidacloprid: May be applied by commercial seed treatment facilities, for end use at agricultural establishments, or immediately before planting . Thiamethoxam: Consult your Syngenta seed treatment representative for recommendations on slurry additives to use when apply- ing Cruiser 5FS . Follow planter manufacturer recommendations for using talc, graphite, or other hopper box additives at planting . |