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Information and Updates
Peanut Notes Peanut Information Series Field days County production meetings Risk Management Tool
Information and Updates Peanut Notes Peanut Information Series - - PowerPoint PPT Presentation
Information and Updates Peanut Notes Peanut Information Series - - PowerPoint PPT Presentation
Information and Updates Peanut Notes Peanut Information Series Field days County production meetings Risk Management Tool Topics 2019 survey Heat units in Sep and Oct Economic value of liming Weed management Insect management Harvest
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Yield Data from PVQE Program
2016-2018 Average of all locations
1000 2000 3000 4000 5000 6000 7000 Bailey Sullivan Wynne Emery Bailey II
Yield (lbs/acre)
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Average heat unit accumulation from 2009-2018 Lewiston-Woodville, NC
18.6 23.16 23.75 21.04 14.15 4.39 20.4 24.3 23.9 25.1 19.4 1.5 M 15 - J 15 J 16-J 15 J 16 - A 15 A 16 - S 15 S 16 - O 15 O 16 - N 1 Ten-year average (2009-2018) 2018
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Influence of soil pH on peanut yield presented as percent of maximum yield
Data are pooled over 3 years
10 20 30 40 50 60 70 80 90 100 4.6 4.9 5.3 5.8 Soil pH
Y = -275.5x + 27.3x2 + 660.4, p = 0.0013, r2 = 0.60, SE of mean, 2.6-3.9
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Estimated economic return on investment in lime for peanut in a single season (not prorated) Adjustment with lime Dolomitic lime Economic return on lime investment ($/acre) Rate Cost 3000 3500 4000 4500 5000 5500 pH tons/acre
____________________________________ $/acre ___________________________________
4.5 to 5.8 1.0 46 251 300 350 399 449 498 4.9 to 5.8 0.8 37 225 269 313 357 400 444 5.3 to 5.8 0.4 18 140 167 212 238 265 273
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4 of 125 populations with suspected resistance to PPO herbicides
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Weed Control in Peanut
Overlapping residuals Intensive weed control early in the season Take pressure off of POST sprays Greater MOA diversity
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Weed Control in Peanut
Gramoxone plus Basagran with residual herbicides Warrant, Outlook, Zidua, or Dual materials
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Control of Thrips Control in Peanut
Effective systemic in-furrow insecticides often need to be supported with early POST applications of acephate Warrant, Outlook, Zidua, or Dual materials are effective residual herbicides applied with Gramoxone plus Basagran These combinations are often applied with acephate for thrips and weed control
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Peanuts can handle each of these alone but not together without significant yield reductions
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Paraquat plus bentazon Paraquat plus bentazon plus pyroxasulfone
One Day after Treatment
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Paraquat plus bentazon Paraquat plus bentazon plus dimethenamid-P
One Day after Treatment
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Paraquat plus bentazon Paraquat plus bentazon plus acetochlor
One Day after Treatment
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Paraquat plus bentazon Paraquat plus bentazon plus S-metolachlor
One Day after Treatment
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Paraquat plus bentazon Paraquat plus bentazon plus pyroxasulfone
Two Weeks after Treatment
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Paraquat plus bentazon Paraquat plus bentazon plus dimethenamid-P
Two Weeks after Treatment
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Paraquat plus bentazon Paraquat plus bentazon plus acetochlor
Two Weeks after Treatment
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Paraquat plus bentazon Paraquat plus bentazon plus S-metolachlor
Two Weeks after Treatment
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2 4 6 8 10 12 14 16 18 20 Non-treated Prevathon Lorsban
Scarring (%)
Injury from Southern Corn Rootworm
Data are from 25 trials during 2016-2017
Yield loss threshold, about 25% scarring
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500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Non-treated Prevathon Lorsban
Pod yield (lbs/acre)
Injury from Southern Corn Rootworm
Data are from 25 trials during 2016-2017
Yield loss threshold, about 25% scarring
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Pyrethroid resistance in corn earworm Presence of tobacco budworm Points to: Use of more effective but certainly more expensive chemistries to control the foliar-feeding insect complex
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How many days from digging?
Assume soil is in good shape, no hurricanes and little to no leaf spot
Write the number on the survey sheet
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Number of Growers from All States Stating that Peanut will be at Optimum Maturity in a Certain Number of Days Based on the Pod Blasting Sample
5 10 15 20 25 30
Percent of Growers Days to Optimum Maturity Based on Pod Blasting Samples
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Peanut Yield (percent of maximum) and Digging Date
Data are pooled over varieties and seeding rates Planted May 16-18
20 40 60 80 100 2016 2017 Sep 8-9 Sep 18-20 Sep 29-30 Oct 10-14 Sep 18 Sep 7
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Assumptions on Digging
Digger size Acres/10-hour day 2 Row 12 4 Row 24 6 Row 36
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Assumptions on Harvesting
Picker size Acres/10-hour day 2 Row Pull Type 8 4 Row Pull Type 12 6 Row Pull Type 16 6 Row Self Propelled 16 8 Row Self Propelled 20
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Days Required to Accomplish an Operation
Operation NC VA Digging capacity 7.0 6.2 2017 digging requirement 15 12 Harvesting capacity 11.9 9.5 2017 harvest requirement 25 18
Buying Point and hauling bottlenecks?! 10-hour work day is very optimistic across many days 2017 field conditions were near perfect
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Percentage of Farmers
Practice NC SC VA Apogee 56 13 51 Guidance 38 79 32 Both 19 10 8
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For each 1 MPH over 2 MPH, yield is reduced by 225 lbs/acre
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Hang in there! Peanuts are important! Look how much soil that
- ne plant is holding back!
Or is it the water?
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And some Epicurean and Stoic philosophers came across him as well and said, “What would this seed- pecking ditherer like to say?”
David Bentley Hart, A Translation of the New Testament