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UF/IFAS Citrus Research

UF/IFAS Citrus Research

Establishing New Plantings

Start by Planning

Grove Planning and Establishment M. Zekri, U. Albrecht, C.I. Vincent and T. Vashisth

Rootstock/Scion Selection

UF/IFAS breeders have screened thousands of rootstock hybrids for HLB tolerance that could be transmitted to grafted scions. They have identified a few truly promising selections.  The combination of UF OLL-8 cultivar on UFR-4 rootstock has a strong performance for both yield and tree health.

View a list of  HLB tolerant varieties that have been developed by UF/IFAS breeders.

When preparing for replanting, an important factor to consider is the choice of rootstock. Choosing the right rootstock and scion combination can result in higher economic returns without any additional cost. Rootstocks affect scion vigor, yield, fruit size, juice quality, and pest tolerance. However, tree growth, yield, and fruit quality interact strongly with climate, soil type, tree spacing, and other factors, often producing contradictory reports on rootstock performance in different areas.

Rootstock selection should be based on soil adaptability, soil pH, pest and disease pressure, desired tree spacing and size control, and other characteristics. Several new rootstock selections were recently released, but not much information exists on their long-term performance under different environmental conditions and different commercial management. Many of these new rootstocks are currently being evaluated under the Fast Track program and it is anticipated that new information will be available in the near future. Also important is the choice of scion to be used in combination with the selected rootstock. Several novel scion varieties have been released by the breeding programs at the USDA and the University of Florida. These novel varieties are expected to have better field performance (disease tolerance) and better fruit quality, making some of them suitable for the fresh fruit market.

Rootstock and Scion Selection U. Albrecht, F. Alferez and M. Zekri

Managing Tree Health

Nutrition of Florida Citrus Trees Thomas A. Obreza and Kelly T. Morgan, Editors
Irrigation Managment of Citrus Trees D.M. Kadyampakeni, K.T. Morgan, M. Zekri, R.S. Ferrarezi, A.W. Schumann and T.A. Obreza
Root Health Managment  E.G. Johnson, J.H. Graham, K.T. Morgan and C.I. Vincent

Pest Management

Check back for information on, pesticide use, alternatives to pesticides, relective mulch, kaolin clay and tree bags.

Weed Management

Weeds S.H. Futch, B.A. Sellers and R.G. Kanissery

Citrus Production Guide