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Pecan Management Update 2010

Pecan Management Update 2010. Lenny Wells UGA Horticulture. Herbicide Strip Program Options for Pecans. Glyphosate + Surflan + Simazine = $24.75/Acre Paraquat + Surflan + Simazine = $28.25/Acre Glyphosate + Prowl = $19/Acre Paraquat + Prowl = $22.50/Acre

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Pecan Management Update 2010

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  1. Pecan Management Update 2010 Lenny Wells UGA Horticulture

  2. Herbicide Strip Program Options for Pecans • Glyphosate + Surflan + Simazine = $24.75/Acre • Paraquat + Surflan + Simazine = $28.25/Acre • Glyphosate + Prowl = $19/Acre • Paraquat + Prowl = $22.50/Acre • Glyphosate + Diuron = $11.40/Acre • Paraquat + Diuron = $14.90/Acre All Glyphosate is at 1 qt/acre ($3.00) All Paraquat is at 2 pts/acre ($6.50) All Surflan ($13.50) and Simazine ($8.25) combos are at 1.5 qt per acre of each product. Diuron @ 1.6 qts/acre ($8.40)----Trees must be at least 3 years old. Use care on Sandy soils

  3. Other Options • Aim (Carfentrazone) • Postemergence control of pigweed, morninglory • Can be tank mixed with glyphosate • Use non-ionic surfactant (1 qt/100gal) or crop oil (1gal/100gal • Best results when weeds are small • $10.50/acre @ 2 oz/acre • Sandea (Halosulfuron) • Postemergence control of nutsedge, pigweed, wild radish • Can be applied to clover • Use only on trees established for at least 1 yr • Only 2 applications/yr • $32/acre @ 1 oz/acre

  4. Other Options-Non-Bearing Pecans • Basagran (Bentazon) • Postemergence control of yellow nutsedge and some broadleaves • 2 pts/acre ($18.75/acre) • May require 2nd application 7-10 days later • Add crop oil (2 pts/acre) • Use low volume (20-30 gal/A)

  5. Mouse Ear • Apply Nickel • 1.5 pts in April • 1.5 pts mid July • 1.5-2 pts in October for severely damaged trees • May require more than 1 yr to correct severe symptoms • Nickel CBM • Nickel (2.5%) • Also contains Cu (0.8%), B (1%), and Mo (0.08%) • S (1.7%) • 2 pts in April • 2 pts 14-21 days later • 2 pts 14-21 days later

  6. Liquid 28-0-0-5 applied over herbicide strip 30% of orchard floor Broadcast Band Application 24% of orchard floor Injection Through Drip System Broadcast Application 100% of orchard floor

  7. Effect of N Application Method on ‘Stuart’ Pecan----Years 1 & 2 N rate for all treatments = 70 lbs/treated acre 28-0-0-5 Liquid Fertilizer) used for Injection and Herbicide Sprayer Applications; Cost = $500/ton Ammonium Nitrate used for broadcast band and broadcast applications; Cost = $495/ton

  8. Planting Depth • Better to plant too shallow than too deep • Highest lateral root even with or just under soil line

  9. Planting 30” 20” 10” Root length at planting Tree survival & growth depends on new root development, not the existing root system. New roots develop from the cut surface. More important in tighter soils. • Bareroot: prune root to 18 inches, remove lateral roots; prune top by 1/3-1/4. • Container: prune any wrapped roots at container bottom

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