PMSP for Pecans in the Southeastern US


StateAlabama, Georgia, Louisiana, North Carolina, Texas
ContactL. Paul Guillebeau, University of Georgia,, (706) 542-9031
ContributorsL. Paul Guillebeau, William Hudson, Gretchen Pettis, Timothy Brenneman, J.W. Christiansen, Patrick Conner, Jim Dutcher, Ben Goff, Roy Goodson, Sidney Lanier, Wayne Mitchem, Bill Ree, Chuck Reilly, Randy Sanderlin, Hilton Seigler, David Shapiro-Ilan, Katherine Stevenson, Bruce Woods


Executive Summary



Category Rank Pest Type Pest Crop Stage Date Priority
Extension/Outreach 1 2015 Weed control manuals for all winter annual weeds.
Extension/Outreach 1 Insects 2015 development of a regional IPM website for pecan management as a tool to deliver technology transfer to growers
Extension/Outreach 2 2015 Increase presence of weed control information in production guides for all winter annual weeds..
Extension/Outreach 2 Insects 2015 increase extension funding for technology transfer
Extension/Outreach 3 Pathogens 2015 integrated orchard management carry considerable management costs
Regulatory 1 2015 Allow registration of herbicide for use in tree limbs for all winter annual weeds.
Regulatory 1 2015 expedite registration of new nematicides and other control tactics as they become available
Regulatory 1 Insects 2015 expedite registration of new fungicides and other control tactics as they become available
Regulatory 2 Insects 2015 develop and implement a program that will allow researchers to test new chemistries on up to 250 acres prior to full registration
Regulatory 3 Insects 2015 encourage regulatory procedures to maintain diversity of chemical disease control options for resistance management to maximize long-term disease control
Research 1 2015 Identification of new pre-emergence herbicide alternatives to simazine and diuron. Such alternatives need to have favorable environmental profiles, provide broadspectrum, long, term residual control.
Research 1 Insects 2015 influence of cultural practices (nutrition, pruning, hedging) on disease and development
Research 2 2015 Woody perennial plants are difficult to control. There is a need for an alternative to glyphosate for controlling undesirable woody perennial plants. Trees can become sensitive to glyphosate applied in late summer and fall. Application time is specific for individual species requiring increased management in orchards where 2 or more perennial weed species are a problem.
Research 2 Insects 2015 effectiveness of fungicide resistance management strategies on pecan
Research 3 2015 Mistletoe is a parasitic weed that can cause significant yield loss. Control depends on physical removal of infected tree limbs. Limb removal reduces tree productivity.
Research 3 Insects 2015 reduced inputs for scab management
Research 4 2015 Screen herbicides for mistletoe efficacy and crop tolerance for all winter annual weeds.
Research 4 Insects 2015 genetic variability in scab and develop resistant varieties to scab (assessment of genotypes as resources for breeders)
Research 5 2015 Investigate the opportunity for biological controls.
Research 5 Insects 2015 molecular characterization of scab resistance
Research 6 Insects 2015 effect of genotype diversity (host mixtures) by row on reduction of scab (disease management)
Research 7 Insects 2015 evaluation of new fungicides on minor crops like pecan
Research 8 Insects 2015 improved fungicide application technology for disease management (reduce inputs)
Research 9 Insects 2015 evaluation of currently registered strobilurin fungicides for downy spot control
Research 10 Pathogens 2015 management of downy spot, in the absence of scab control or on scab resistant varieties
Research 11 Insects 2015 timing of fungicide applications for most effective disease control, relative to availability of initial inoculum and host susceptibility
Research 12 Insects 2015 evaluation of scab-resistant pecan cultivars for resistance to this and other secondary diseases
Research 13 Insects 2015 management options for Phytophthora shuck and kernel rot
Research 14 Insects 2015 need data on efficacy of currently registered strobilurins (azoxystrobin, kresoximmethyl, pyraclostrobin), strobilurin mixtures (Stratego), DMI/fentin hydroxide mixtures, ziram, dodine, and dodine/fenbuconazole mixtures on Phytophthora shuck and kernel rot
Research 15 Insects 2015 need more quantitative info on economic impact of Phytophthora shuck and kernel rot and yield loss
Research 16 Insects 2015 evaluation of scab-resistant pecan cultivars for resistance to this other secondary diseases
Research 17 Insects 2015 quantitative effects of sooty mold on pecan yield and production
Research 18 Insects 2015 etiology/taxonomy of sooty mold fungi on pecan
Research 19 Insects 2015 influence of cultural practices (nutrition, pruning, hedging) on disease development
Research 20 Insects 2015 management options for sooty mold

Production Facts

Production Year
US Rank
% US Acres
Acres Planted
Acres Harvested
Production Costs/Acre
Natl Avg/Acre
State Avg/Acre
Per Acre Value
Production Value

Worker Activities

Production Counties

Production Practices

IPM Practices

Pollinator Protection


No Data

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No Data

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Biological Controls

Cultural Controls

Physical Controls

Chemical Controls

Active Ingredient CAS PC Pests REI (hrs) PHI (days) Description IPM Resistance
Agrobacterium Radiobacter strain k1026 Unknown 6474
Azoxystrobin 131860-33-8 128810
Dodine 2439-10-3 44301
Fenbuconazole 119611-00-6 129011
Fentin Hydroxide 76-87-9 83601
Kocide 20427-59-2 23401
Kresoxim-methyl 143390-89-0 129111
Propiconazole 60207-90-1 122101
Sulfur 7704-34-9 77501
Temik 116-06-3 98301
Thiophanate-methyl 23564-05-8 102001
Tpth 76-87-9 83601
Trifloxystrobin 141517-21-7 129112
Ziram 155-04-4 34805


Pest Active Ingredient PC Code CAS Efficacy Code Comments
Efficacy Codes
EExcellent, 90-100%
GGood, 80-90%
FFair, 60-80%
PPoor, 25-60%
NCNo Control, <25%
G-EGood to Excellent, 80-100%
F-EFair to Excellent, 50-100%
P-EPoor to Excellent, 25-100%
F-GFair to Good, 50-90%
P-GPoor to Good, 25-90%
P-FPoor to Fair, 25-80%
NUNot Used
RRarely Used

Resistance Management



Production Practices JanFebMarAprMayJunJulAugSepOctNovDec Entered Comments

Pests JanFebMarAprMayJunJulAugSepOctNovDec Entered Comments

Stages JanFebMarAprMayJunJulAugSepOctNovDec Entered Comments

Chemicals JanFebMarAprMayJunJulAugSepOctNovDec Entered Comments
Agrobacterium Radiobacter Strain K1026 08-18-16
Azoxystrobin 08-18-16
Dodine 08-18-16
Fenbuconazole 08-18-16
Fentin Hydroxide 08-18-16
Kocide 08-18-16
Kresoxim-methyl 08-18-16
Propiconazole 08-18-16
Sulfur 08-18-16
Temik 08-18-16
Thiophanate-methyl 08-18-16
TPTH 08-18-16
Trifloxystrobin 08-18-16
Ziram 08-18-16

Worker Activities JanFebMarAprMayJunJulAugSepOctNovDec Entered Comments