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Flower Bud Induction Overview and Advisory
Flower Bud Induction
NOTICE FOR CITRUS EXTENSION AGENTS & SPECIALISTS AND GROWER NEWSLETTERS
The following information has been developed as part of the Decision Information System for Citrus
Citrus Research & Education Center, Lake Alfred, FL
Current Status: Within 4 days cool temperature induction will have reached 820 to 950 hours below 68° F for southern to central citrus producing regions in Florida.
With the higher induction levels that are now present, the buds will begin to grow if daytime high temperatures reach 80°F for just a few continuous days. Such conditions are predicted for South Florida citrus areas. The Indian River and Central Florida will be border-line for growth initiation temperatures.
Since cool temperatures have reached these levels, flower enhancing sprays may not be needed, but one of the chemical sales companies correctly pointed out that enhancing flowering intensity will reduce the possibility of multiple blooms. The advantage of this is to shorten the time when harsher psyllid sprays can’t be applied and reduce the chance of another PFD event this season and the number of sprays that are needed if PFD does occur.
See the last advisory for flower enhancement spray information. If you choose to apply either urea and/or PO3 you should do so immediately. The recommendations are for one or the other. We have not data on combining the two products at some reduced rate.
Millet