Mich. Admin. Code R. 285.609.1 - Strawberry plant inspection and certification
Rule 1.
(1)
Strawberry plants shall be considered eligible for inspection and certification
provided the plants are taken from plantings that are:
(a) First year plantings.
(b) Well cultivated and maintained
essentially free of weeds and grasses.
(c) Generally thrifty. Very thin plant stands
may be disqualified.
(d) Planted on
soil that has not been exposed to the Red Stele disease within the past 15
years.
(e) Maintained apparently
free of insect pests, plant diseases and parasitic nematodes and within the
standards established by this rule.
(2) The following combination of inspections
shall be required as a prerequisite to certification:
(a) One or more inspections of the plants
made on or about blossoming time or at such season of the year when soil
temperature and moisture and growing conditions are proper for expression of
the symptoms of the Red Stele disease caused by the fungus Phytophthora
fragaria.
(b) One or more
inspections made during the late summer or fall seasons for other insect pests,
plant diseases, and nematodes.
(3) Certified plants must be apparently free
of insect pests, plant diseases, and parasitic nematodes, and must originate
from plantings in which the number of plants infested with certain pests do not
exceed the tolerances herein provided:
(a) Red
Stele--zero.
(b) Crimp (Foliar
nematode disease)--zero.
(c) Root
knot nematode--zero, provided that plantings not generally infested at the time
of field inspection may be restricted at the discretion of the director subject
to inspection at the grower's request and his expense, after the plants have
been dug and graded.
(d) June
yellows (Blakemore yellows)--1% provided visibly affected plants are
rogued.
(e) Crinkle and virus
yellows--zero.
(f) Aster yellows
and witches broom--1%, provided infected plants are rogued.
(4) Only those strawberry plants
that meet the foregoing certification requirements and have been produced in
accordance with the following standards shall be certified to be "disease free"
or "virus free" or "produced from 'virus free' stock" or "registered" or
"foundation stock" or any other term or terms that may be so construed, and the
use of any such terms in labeling, advertising or selling strawberry plants
shall be restricted to plants so classified by the legally constituted plant
regulatory official of the state of origin, provided that strawberry plant
foundation stock utilized in Michigan shall mean plants determined to be free
of known harmful virus diseases by the Michigan department of agriculture:
(a) Foundation stock approved by the plant
regulatory official must be planted on a site approved by such official and
shall be at all times isolated by at least 1,500 feet from other strawberry
plants, either domesticated or wild, provided that enclosure of the planting
site with an approved insect-proof screen house shall nullify the isolation
requirement.
(b) The planting site
shall not have been cropped in potatoes, tomatoes, or other solanaceous plants
within the preceding 5 years.
(c)
The soil of the planting site must be fumigated for the eradication of
parasitic nematodes prior to planting.
(d) Fragaria vesca indicator plants must be
planted in a border row around the planting or interplanted in a manner
approved by the plant regulatory official.
(e) Insect vectors of viruses and other
insect pests shall be controlled by the application of insecticide at
prescribed intervals, using such formulations and quantities of materials as
shall be approved by the plant regulatory official.
(f) Propagation of plants for special
certification may continue from foundation stock for a maximum period of 2
years, provided that virus-infected plants are not found at the planting
site.
(5) The
requirements set forth within the provisions of subrules (1), (2), and (3) of
this rule shall constitute the minimum for the certification of strawberry
plants shipped or carried into or within Michigan, and plants so certified,
shipped, or carried must be accompanied by a valid certificate of inspection
issued by the legally constituted certifying agency of the state of
origin.
Notes
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