(a) Clean cultivated at all times with the exception of a winter cover crop or mowed
sod culture.
(b) Fertilized and pruned to assure maximum quality scionwood growth.
(c) Maintained in a condition free of insect pests and plant diseases by intensive
spraying and other control practices recommended by the department or Michigan
State University.
(d) The soil of the site shall be free of harmful nematodes and insects or shall be
fumigated to eliminate them. A post-fumigation inspection is necessary.
(2) Trees shall not be added to, or removed from, a scionwood orchard without prior
notice to the department. Trees in the scionwood orchard determined to be
undesirable by the department shall be removed by the owner or person in charge
within 10 days of receipt of notice from the department.
History: 1979 AC; 1984 AACS.
R 285.619.4 Parent tree registration.
Rule 4. A registered parent tree shall be assigned an identifying registration
number by the department. Registration of a parent tree shall be continued from year to
year if the requirements of
R
285.619.1 to R 285.619.3 are met and biannual
growing season inspections and indexing show the tree to be free of virus diseases.
Registered trees shall be indexed on indexing host plants at the discretion of the
department. Indexing shall be done by the department or by others approved by, and
subject to the supervision of, the department. If the indexing is done by others, the
department shall, in addition to the indexing done by others, randomly index up to 5%
of the registered trees.
History: 1979 AC; 1984 AACS.
R 285.619.11 Understock parent tree certification.
Rule 11. (1) An understock seed source parent tree is considered registered when
determined to be free of seed transmissible viruses by procedures established in R
285.619.1. Continuance of registration depends upon the registrant remaining virus-
free as determined by procedures established in R 285.619.4.
(2) A clonal understock parent tree or stool bed is eligible for registration when it
is the direct, own-rooted progeny of a registrant or when it is determined to be virus-
free by the procedures established in R 285.619.1 and trueness-to-name has been
established to the satisfaction of the department. A continuous row of a clone on it
own roots established for layering or for cuttings is considered a stool bed and a
unit for registration purposes. Continuance of registration depends upon the
registrant remaining virus-free as determined by procedures established in R 285.619.4.
History: 1979 AC.
R 285.619.21 Nursery stock, understock, and seed; designation.
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