1. Rootstock Update for the Indian River Region Bill Castle UF Professor Emeritus Horticulture Citrus Research and Education Center Lake Alfred bcastle@ufl.edu October 25, 2011

2. 43 Valencia/WILLITS citrange at 43 years old [2009]

3. Agenda Knowledge management. Florida acreage, scion and rootstock statistics. Sour orange [5.7%]. Rootstock data from local trials. Economics. Grapefruit fruit size distribution according to rootstock and year. Planting density/intensive cultural management.

4. Understanding Data Connectedness Wisdom Knowledge Information Relationships Patterns Principles Citrus aurantium; CTV; high solids; soil suitability. SWEET The SWEET Spot More facts..... scion, fruit size, yield about more rootstocks. Differences between rootstocks; data and information reliability. The combinations of biological, field and market factors that determine economic outcomes.

5. Acreage Indian River district: 50,658 ABANDONED. Total: 541,328. IR 78,013 [14.4%] Grapefruit: 48,990. [White 28%; Reds 70%] Specialty: 19,292. Tangelos – 4,383 [Orlando 2,451; Minneola 1,587] Temples – 190 Tangerines – 13,127 Fallglo – 1,459 Sunburst – 5,681 Murcott – 6,342

6. Rootstocks ScionCarrizoCleoKinkojiSwingleVolkx639 Flame<1008940 Ray Ruby22101611 Rio Red<102230<1 Ruby Red17<1 280<1 Minneola25042800 Murcott8719202 Valencia43033849

10. Grove in Sebring Valencia/Swingle citrumelo. 15 years old. ~ 9 x 18 = 268 trees/ac. Last 10 years averaged 615 boxes/acre.