Managing peanut varieties. Barry L. Tillman

Transcription

1 Managing peanut varieties Barry L. Tillman

2 Outline of Topics Plant stand Varieties for what s available Variety Performance Newer Varieties TUFRunner 297, TUFRunner 511, Georgia-12Y, Georgia- 13M, Georgia-14N Varieties on the horizon TifNV-High O\L, Georgia-16HO, FloRun 331, AU-NPL 17 Managing varieties Disease resistance / susceptibility Can we reduce costs? Disease management Cultural practices Fungicides

3 Plant Stand and Replanting

4 Yield usually maximized at 2.5 plants/ft Similar average yield 257 lbs/a difference

5 Yield usually maximized at 2.5 plants/ft (Sarver, Tubbs, et al. UGA)

6 Yield usually maximized at 2.5 plants/ft (Sarver, Tubbs, et al. UGA)

7 Number of plants/row foot With high germination (90%+), between 65% and 75% of seed will survive to a healthy plant Plant population as a function of seeding density- Marianna, FL seedlings emerged plants at harvest sd/ft 6 sd/ft % 74% 78% 68%

8 Plant stand and germination Germination plant stand i.e., 90% germ. 10 seed to get 9 plants At best 90% germination = about 7 plants per 10 seeds planted 6 seeds/foot 4 67% total efficiency (includes dead seed) Why? o o o Soil conditions wet, cool, dry Seed vigor- production, storage, shelling, etc. Cultivar- some better than others Minimum germination for seed certification is 75%

9 Plant stand and replanting 1 st priority- get adequate stand on first planting Avoid risky situations Cool soils, wet soils, dry soils Planting ahead of/after cold front Cool irrigation water Replant if stand less than 2.0 to 2.5 plants/ft Depends on uniformity Large skips = more likely replant pays Complete replanting usually lower yield Unless complete or near complete stand failure Replant within 3 weeks of initial planting Add seed proportional to initial stand for supplemental replanting

10 Seed Availability

11 Varieties available based on Sheller survey Birdsong Brooks Damascus Forrester Golden McClesky Cunningham Sessions Total Certified Acreage Variety AU-NPL 17 In Foundation production in FloRun 107 Limited 128 FloRun 331 In Foundation production in Georgia Greener Limited 213 Georgia-06G 148,629 Georgia-07W Limited 173 Georgia-09B 12,347 Georgia-12Y Limited Limited Limited 1,657 Georgia-13M Limited 72 Georgia-14N 3,680 Georgia-16HO Limited Limited Limited Limited 397 Tifguard 7,703 TifNV-High O/L Limited Limited 155 TUFRunner 297 2,058 TUFRunner 511 2,173

12 Certified Seed Production, AL, FL, GA 2017

13 Seed Production in 2017 for 18 crop Plenty of Georgia-06G, Georgia-09B Moderate supply/on the Increase Tifguard Georgia-14N TUFRunner 511 TUFRunner 297 Georgia-12Y Limited supply of ( acres) FloRun 331 Georgia-16HO TifNV-High O/L Seed Increase of (30 acres) AU-NPL 17

14 Variety Performance

15 University of Florida SWVT Similar average yield 194 lbs/a difference

16 University of Florida SWVT Similar average yield 194 lbs/a difference

17 University of Georgia SWVT Similar average yield 300 lbs/a difference

18 Auburn University VT

19 Disease Resistance If fields have a history of white mold, Peanut Rx 2018 Version use variety with points on Peanut Rx: Florida-07,Georgia-07W, Tifguard Variety 1 Spotted Wilt Leaf Spot White mold Florida FloRun TM FloRun TM Georgia-06G Georgia-07W Georgia-09B Georgia-12Y Georgia-13M Georgia-14N Georgia-16HO Tifguard TifNV-HiOL TUFRunner TM TUFRunner TM

20 Do current cultivars have sufficient TSWV resistance to minimize risk of early planting? Not without combining with other risk factors Thimet Plant stand 4/foot Twin rows Resistant cultivar (10 points or less) Why? Georgia Greener, Georgia-06G, Florida-07, Tifguard, Georgia-07W, Georgia-07W Spotted Wilt

21 2016 UGA Disease Evaluations- Dr. Brenneman MULTI-STATE DISEASE EVALUATION, 2016 TSWV 1 LEAF SPOT 2 WHITE MOLD 3 Percent 4 YIELD GENOTYPE 31-Aug 21-Sep 11-Oct NO ZEROES ALL Zeroes (LB/A) FloRun TM '331' TIFNV HIO/L Georgia-12Y TUFRunner ' 297' Georgia-14N TUFRunner ' 511' Georgia-13M Georgia-06G LSD (P<0.05)

22 2017 UGA Disease Evaluations- Dr. Brenneman Multi-State Disease Evaluations, 2017 TSWV 4 Leaf Spot 3 White Mold 2 Percent 1 Yield Entries 14-Sep 4-Oct No Zeroes All Zeroes (lb/a) Georgia-12Y TIFNV HI O/L FloRun Georgia-16HO Georgia-14N Georgia-17SP TUFRunnner Georgia-06G Georgia-13M AU-NPL LSD (P<0.05)

23 Pod yield (lbs./acre) Incidence of spotted wilt (%) Spotted Wilt Thimet (TH) compared to no Thimet (NT) Tifton, GA 2016, Dr. Albert Culbreath, UGA Yield- NT Yield-TH TSWV-NT TSWV-TH

24 Spotted Wilt Thimet (TH) compared to no Thimet (NT) Tifton, GA 2017, Dr. Albert Culbreath, UGA

25 White Mold

26 White mold tests sprayed with Bravo 7-8 times Rx=10-15 Rx=15-20 Rx=20-25 Similar average yield ~500 lbs/a difference

27 Pod Yield (lbs./acre) Leaf spot tests- 0, 4, and 8 sprays University of Florida Leaf spot tests Rx= Rx= Rx= **High Oleic No Spray 4 Sprays 8 Sprays

28 Disease Resistance If fields have a history of white mold, Peanut Rx 2018 Version use variety with points on Peanut Rx: Florida-07,Georgia-07W, Tifguard Variety 1 Spotted Wilt Leaf Spot White mold Florida FloRun TM FloRun TM Georgia-06G Georgia-07W Georgia-09B Georgia-12Y Georgia-13M Georgia-14N Georgia-16HO Tifguard TifNV-HiOL TUFRunner TM TUFRunner TM

29 Georgia-12Y Georgia-06G How would I manage: Variety Planting Thimet Twin Rows May 1-31 if planting earlier than May 10 Yes, especially if planting before May 10 White mold program Early season Yes, especially if planting early Mid season May need more than folicur if weather conditions warrant: Convoy, Elatus, Fontelis, Alto+Abound, Evito, Provost,etc. Leaf spot program Bravo and Folicur (or generic equivalents) are okay espeically if rotation is 2 years or more April 15- May 31 if planting earlier than May 10 Probably not needed for spotted wilt control May not be needed Okay with Bravo and Folicur (or generic equivalents), especially if rotation is 2 years or more Bravo and Folicur (or generic equivalents) are okay especially if rotation is 2 years or more

30 Georgia-13M Georgia-09B How would I manage: Variety Planting Thimet Twin Rows White mold program Early season Mid season Leaf spot program May use on all plantings Yes, especially if planting before May 10 Yes, especially if planting early Will likely benefit from Convoy, Elatus for WM control Will likely benefit from fungicides with better activitiy on LS: Priaxor, Elatus, Alto+Abound, Fontelis, Evito, Provost, etc. April 15- May 25 if planting earlier than May 10 Yes, especially if planting before May 10 Yes, especially if planting early Will likely benefit from Convoy, Elatus for WM control Need to use fungicides with better activitiy on LS: Priaxor, Elatus, Alto+Abound, Fontelis,, Evito, Provost, etc

31 TUFRunner 297 TUFRunner 511 Variety Planting May May 1-25 How would I manage: Thimet Twin Rows use on all plantings if planting earlier than May 10 White mold program Early season Yes, Probably especially if planting before May 10 needed only if high risk of white mold Yes, Probably especially if needed only planting if high risk of before May white mold 10 Mid season Probably okay with Bravo and Folicur (or generic equivalents), especially if rotation is 2 years or more Probably okay with Bravo and Folicur (or generic equivalents), especially if rotation is 2 years or more Leaf spot program Need to use fungicides with better activity on LS: Priaxor, Elatus, Alto+Abound, Fontelis, Evito, Provost, etc If risk is high, will benefit from fungicides with better activity on LS: Priaxor, Elatus, Alto+Abound, Fontelis, Evito, Provost, etc. If risk is low, may be okay with Bravo,

32 Georgia-14N Tifguard How would I manage: Variety Planting Thimet Twin Rows May 1- May 31 if planting earlier than May 10 Yes, especially if planting before May 10 White mold program Early season Mid season Probably needed only if high risk of white mold Probably okay with Bravo and Folicur (or generic equivalents), especially if rotation is 2 years or more Leaf spot program Bravo and Folicur (or generic equivalents) are okay espeically if rotation is 2 years or more May 1- May 31 if planting earlier than May 10 Yes, especially if planting before May 10 Probably needed only if high risk of white mold Probably okay with Bravo and Folicur (or generic equivalents), especially if rotation is 2 years or more Bravo and Folicur (or generic equivalents) are okay especially if rotation is 2 years or more

33 FloRun TM 331 TifNV-HiOL How would I manage: Variety Planting Thimet Twin Rows May 10- May 31 May 1- May 31 if planting earlier than May 10 if planting earlier than May 10 Yes, especially if planting before May 10 Yes, especially if planting before May 10 White mold program Early season Mid season Probably needed only if high risk of white mold Probably needed only if high risk of white mold Probably okay with Bravo and Folicur (or generic equivalents), especially if rotation is 2 years or more Probably okay with Bravo and Folicur (or generic equivalents), especially if rotation is 2 years or more Leaf spot program Bravo and Folicur (or generic equivalents) are okay especially if rotation is 2 years or more, but will benefit from stronger fungicides Bravo and Folicur (or generic equivalents) are okay especially if rotation is 2 years or more

34 Peanut Field Day- Marianna August 23, 2018