Effect of B Rate and Timing on Runner Peanut Yield, Grade, and Seed Quality.

Effect of B rate and timing on runner peanut yield, grade, and seed quality

Alex Callaway¹, Julie Howe¹, Glendon Harris², Kris Balkcom¹

1 Auburn University, Auburn, AL | 2 University of Georgia, Tifton, GA

Boron deficiency in peanut results in internal seed damage known as “hollow heart”, signified by discoloration and malformation of the center of the kernel. Although hollow heart greatly reduces the quality and value of a peanut crop, crop recommendations have not been re-evaluated on current larger seeded peanuts, such as Georgia-06G. The objective of this study was to evaluate the effect of boron source and rate on runner peanut yield, grade, and seed quality. A field trial was conducted in 2015 under irrigation at the Wiregrass Research and Extension Center (WREC) in Headland, AL. Borosol-10 (Loveland Products, Loveland, CO), Solubor (U.S. Borax, Denver, CO), and Boron Xtra (Custom Ag Formulators, Inc, Fresno, CA) were used as boron sources evaluated on Georgia-06G. Borosol-10 was evaluated at three different rates: 0.28, 0.56, and 1.12 kg ha^-1. Two of these rates (0.56 and 1.12 kg ha^-1) were evaluated under two different timing regiments – a single application at 30 days after planting (DAP) and a split application at 30 DAP and 45 DAP. Solubor and Boron Xtra were applied at the recommended product rate of 1.12 kg ha^-1 applied at 21 DAP and 0.072 L ha^-1 applied at 30 DAP, respectively. Results indicate that boron recommendations are sufficient for Georgia-06G.