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 survey from 2018
Yield Data from PVQE Program 2016-2018 Average of all locations 7000 Yield (lbs/acre) 6000 5000 4000 3000 2000 1000 0 Bailey Sullivan Wynne Emery Bailey II
Average heat unit accumulation from 2009-2018 Lewiston-Woodville, NC 25.1 24.3 23.9 23.75 23.16 21.04 20.4 19.4 18.6 14.15 4.39 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
Influence of soil pH on peanut yield presented as percent of maximum yield Data are pooled over 3 years 100 Y = -275.5x + 27.3x 2 + 660.4, p = 0.0013, r 2 = 0.60, SE of mean, 2.6-3.9 90 80 70 60 50 40 30 20 10 0 4.6 4.9 5.3 5.8 Soil pH
Estimated economic return on investment in lime for peanut in a single season (not prorated) Dolomitic lime Economic return on lime investment ($/acre) Adjustment with lime Rate 3000 4000 Cost 3500 4500 5000 5500 pH tons/acre ____________________________________ $/acre ___________________________________ 4.5 to 5.8 1.0 350 46 251 300 399 449 498 4.9 to 5.8 0.8 37 225 269 357 400 313 444 5.3 to 5.8 0.4 18 140 167 238 265 273 212
4 of 125 populations with suspected resistance to PPO herbicides
Weed Control in Peanut Overlapping residuals Intensive weed control early in the season Take pressure off of POST sprays Greater MOA diversity
Weed Control in Peanut Gramoxone plus Basagran with residual herbicides Warrant, Outlook, Zidua, or Dual materials
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
Peanuts can handle each of these alone but not together without significant yield reductions
One Day after Treatment Paraquat plus bentazon Paraquat plus bentazon plus pyroxasulfone
One Day after Treatment Paraquat plus bentazon Paraquat plus bentazon plus dimethenamid- P
One Day after Treatment Paraquat plus bentazon plus acetochlor Paraquat plus bentazon
One Day after Treatment Paraquat plus bentazon plus S -metolachlor Paraquat plus bentazon
Two Weeks after Treatment Paraquat plus bentazon Paraquat plus bentazon plus pyroxasulfone
Two Weeks after Treatment Paraquat plus bentazon plus dimethenamid- P Paraquat plus bentazon
Two Weeks after Treatment Paraquat plus bentazon plus acetochlor Paraquat plus bentazon
Two Weeks after Treatment Paraquat plus bentazon plus S -metolachlor Paraquat plus bentazon
Injury from Southern Corn Rootworm Data are from 25 trials during 2016-2017 Scarring (%) Yield loss threshold, about 25% scarring 20 18 16 14 12 10 8 6 4 2 0 Non-treated Prevathon Lorsban
Injury from Southern Corn Rootworm Data are from 25 trials during 2016-2017 Yield loss threshold, about 25% scarring Pod yield (lbs/acre) 5000 4500 4000 3500 3000 2500 2000 1500 1000 500 0 Non-treated Prevathon Lorsban
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
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
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 30 Percent of Growers 25 20 15 10 5 0 Days to Optimum Maturity Based on Pod Blasting Samples
Peanut Yield (percent of maximum) and Digging Date Data are pooled over varieties and seeding rates Planted May 16-18 100 80 Sep 8-9 60 Sep 18-20 40 Sep 29-30 Oct 10-14 20 0 2016 2017 Sep 18 Sep 7
Assumptions on Digging Digger size Acres/10-hour day 2 Row 12 4 Row 24 6 Row 36
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
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
Percentage of Farmers Practice NC SC VA Apogee 56 13 51 Guidance 38 79 32 Both 19 10 8
For each 1 MPH over 2 MPH, yield is reduced by 225 lbs/acre
Hang in there! Peanuts are important! Look how much soil that one plant is holding back! Or is it the water?
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
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