This on-farm research trial assessed the efficacy of different standard commercial fungicide programs in comparison to a lower-cost Tebuconazole program on peanuts. Nine fungicide programs were tested in a randomized complete block design with four replications. Results showed the Tebuconazole and Provost (8oz) programs had the highest yields and net returns to producers, controlling white mold moderately well. While disease pressure was low, the Tebuconazole program performed as well as or better than standard commercial programs at a lower cost.

1. PEANUT FUNGICIDE TRIAL TO ASSESS STANDARD
PROGRAMS TO TEBUCONAZOLE TREATMENTS
Andrews*, E.L. 1, Kemerait, R.C. 2
1 UGA Cooperative Extension, Lanier County, Lakeland, GA 31635, 2 University of Georgia Extension Pathologist, P.O. Box 748, Tifton, GA 31794
Abstract 2010 Peanut Fungicide Spray Program
Peanut producers must find acceptable means to increase yields while minimizing cost of production. Name White Mold Yield Program Net Return *
Fungicide disease management is one of the single greatest expenses associated with peanut production in Hits / 200 ft lb / Acre $ / Acre $ / Acre
Georgia. This large on farm research trial is to assess the efficacy of different standard commercial fungicide
programs in comparison to a 4-block low-cost Tebuconazole program. Using the 2010 Peanut Fungal Tebuconazole 6.5 A 5287.0 A 28.12 874.32
Disease Risk Index, this research was established on River Bottom Farms in Lanier County, GA in a field with
moderate disease risk (non-irrigated, long rotation, twin row, minimum tillage, Georgia Greener variety) for Tebuconazole/Chlorothalonil 14.25 A 4982.3 BC 40.12 808.24
fungal disease. Nine fungicide programs were included in the study. These plots were randomized complete
block experimental design with four replications. They were managed according to production practices Provost (8oz) 11.2 A 5275.0 A 56.48 843.83
recommended by UGA Cooperative Extension. The data results of this large field trial will be reported in
terms of disease control, final yields, cost of the fungicide spray program and net return to the producer. Abound 12.8 A 5081.0 ABC 69.44 809.45
Objective
Artisan 3.5 A 5154.3 ABC 68.48 821.80
Convoy 2.8 A 5218.5 AB 61.52 828.76
Peanut producers must find acceptable means to increase yields while minimizing cost of production.
Fungicide disease management is one of the single greatest expenses associated with peanut Provost (10oz) 14.5 A 5017.0 BC 68.36 797.52
production in Georgia. This on farm research trial is to assess the efficacy of different standard
commercial fungicide programs in comparison to a 4-block low-cost Tebuconazole program. Evito 14.0 A 4918.8 C 95.80 741.29
Headline/Tebuconazole 25.5 A 5156.3 ABC 55.33 829.91
Means followed by same letter do not significantly differ (Fisher’s Protected LSD at p<0.1).
Fungicide Application * Net Return: Value to producer determined as yield(ton/acre) multiplied by $355/ton minus Program Cost/Acre
plus $6/Acre per trip across field.
Results
White Mold Tomato spotted wilt virus and leaf spot diseases were too low to rate due to excellent early season weather
conditions. White mold hits were numerically different however they were not statistically different. It was
discovered at digging that part of this field had high disease risk for white mold due to past history of being
planted into wildlife plots. This was evident when the plots were dug. Treatments that stood out statistically to
moderate and high disease risk were Tebuconazole and Provost (8oz). These treatments were followed by
Convoy, Headline/Tebuconazole, Artisan and Abound. Cost for treatments ranged from $28.12 for only
Tebuconazole to $95.80 for Evito. Net return to the producer was determined by yield (Tons/A) multiplied by
$355/ton (loan rate) minus the cost of the chemical program plus the cost per application at $6/A per trip across
the field. Net return to the producer was highest on Tebuconazole program followed by Provost (8oz). The Evito
Materials and Methods program gave the least return.
Using the 2010 Peanut Fungal Disease Risk Index, this research was established on River Bottom Farms in
Lanier County, GA in a field with moderate disease risk (non-irrigated, long rotation, twin row, minimum tillage,
Georgia Greener variety) for fungal disease. Nine fungicide programs were included in the study. They were
planted on May 10 in 36 inch twin-rows 6 rows wide. These plots were length of the field randomized complete Conclusion
block experimental design with four replications. They were managed according to production practices Low-cost Tebuconazole treatments were equal to or greater than standard commercial fungicide programs.
recommended by the University of Georgia Cooperative Extension. Plots were dug and rated on September 20
and harvested on September 23. Plots were combined with 6 row harvester and weighted in a 4 wheel trailer on
portable scales.