|(a) Trees in a foundation block must be tested by a
certified laboratory to verify that foundation block trees continue
to be free of diseases listed in §21.2 of this title (relating
to Quarantined Pests and Diseases).
(b) At a minimum, the following measures shall be taken
to prevent disease contamination from internal or external sources.
(1) If one or more foundation block trees become infected
with a disease listed in §21.2 of this title, or a vector of
such disease, the affected tree(s) must be removed immediately.
(2) Tools and equipment used to cut or prune foundation
block trees shall be used only in the foundation block and shall be
disinfected before use on any other tree, unless:
(A) it is impractical to restrict equipment use only
to the foundation block; and
(B) such equipment has been treated with an antimicrobial
pesticide labeled to control citrus graft transmitted pathogens and/or
as guidelines prescribed by the department.
(3) Irrigation of the foundation block shall be performed
in such a manner as to minimize the risk of transmission of diseases
through the irrigation system.
(4) A foundation block must be completely contained
in a certified citrus nursery in accordance with Subchapter D of this
chapter (relating to Citrus Nursery Stock Certification Program).