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Abstract

The United States is one of the world’s leading pecan producers, and Georgia has historically been the leading pecan-producing state. Soils throughout the southeastern Coastal Plain are low in natural fertility and overall quality. Due to the importance of pecans in this growing region, much focus has been placed on improving yields and maintaining orchard health. Increasing orchard soil health and fertility is essential to produce high yields and improve the soil quality found throughout the southeastern Coastal Plain. As a consequence of the high level of rainfall and humidity in this region, pecan scab [Venturia effusa (G. Winter) Rossman & W. C. Allen (basyonym Fusicladium effusum)] is prevalent. The use of disease resistant cultivars such as ‘Lakota’, ‘McMillan’, and ‘Excel’ may help producers increase net returns while reducing the amount of fungicides needed to manage pecan scab. Soil quality of commercial pecan orchards were assessed throughout a major commercial pecan producing region of South Georgia. Low input disease resistant pecan cultivars were evaluated for scab incidence at the University of Georgia Ponder Research Farm. Results from orchard soil studies demonstrate that pecan orchards under commercial management exhibited much higher levels of soil health and fertility compared to row crop fields in the southeastern Coastal Plain. Selected soil quality indicators provide evidence that the soil quality of commercial pecan orchards in this region is significantly improved over time. Results from the low input cultivar trials suggest that the utilization of scab resistant cultivars can reduce the amount of fungicides needed for optimal yields; thus providing a more sustainable means of production.

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