Washington Administrative Code › Title 16 - Agriculture, Department of (See also Titles 24, 60, and 142) › SEEDS AND PLANTING STOCK CERTIFICATION › Chapter 16-302 - General rules for seed certification › Part 5 - SPECIFIC SEED CERTIFICATION STANDARDS › Grass Seed Certification Standards › Section 16-302-330 - Field isolation requirements for grass seed certification

Current through Register Vol. 24-14, July 15, 2024
(1) The field
					 isolation requirements for grass seed are as follows:
(a) A seed field eligible for the production
					 of foundation, registered or certified seed must be isolated from any other
					 variety or strain of the same species in accordance with the requirements in
					 the following table:
Minimum Isolation Distance Required for
									 Fields Producing:
Symbol for Type of
									 Reproduction
Foundation
Registered
Certified
Strains at least 80%
Apomictic A
60 feet
30 feet
15 feet clean fallow
Highly Self-Fertile Species -- S
60 feet
30 feet
15 feet clean fallow
All cross-pollinated
Species -- C
900 feet
300 feet
165 feet
(b) A seed field that is eligible for the
					 production of foundation or registered seed must be isolated from different
					 classes of the same variety of cross-pollinated (C) species in accordance with
					 the requirements in the following table:
Class Seed Planted
Class Seed Produced
Distance Required From Nearest Field
									 Producing:
Breeder
Foundation
Registered
150 feet
Breeder
Foundation
Certified
225 feet
Foundation
Registered
Certified
75 feet
(c) Isolation is not required in fields
					 producing certified class seed when the isolation zone is less than ten percent
					 of the entire field being certified if there is a clear (ten feet) line of
					 demarcation between adjacent varieties. The isolation zone is the area
					 calculated by the length of the common border with other varieties by average
					 width of the certified field falling within the one hundred sixty-five feet
					 isolation distance requirement.
(d)
					 A field eligible for the production of foundation, registered or certified seed
					 must be isolated from classes of the same variety of apomictic (A) and
					 self-fertile (S) species in accordance with the following requirements:
(i) A field producing foundation or
					 registered seed must be a minimum of fifteen feet from a field planted with a
					 different class of the same variety.
(ii) A field producing certified seed must be
					 a minimum of five feet from a field planted with a different class of the same
					 variety.
(e) If it is
					 not possible to provide minimum isolation distances for fields producing
					 foundation, registered or certified seed exceeding five acres in area, border
					 removal is permitted. Border removal requires removal of the portion of the
					 field being certified that is adjacent to a contamination source. The following
					 requirements apply if the grower uses border removal:
(i) The minimum distances required for border
					 removal are as follows:
Minimum Isolation Distance Required for
									 Fields
Producing:
Border to be removed from the field
									 being
certified
Foundation
Registered
Certified
0 feet
900 ft.
300 ft.
165 ft.
15 feet
450 ft.
150 ft.
75 ft.
(ii) The grower must apply for seed
					 certification of the entire field and clearly stake off the border removal
					 portion before inspection of the field by the certifying agency.
(f) The border removal portion of
					 the field may be harvested for uncertified seed under the following conditions:
(i) The entire field must pass all
					 certification requirements except for isolation at time of inspection. The
					 field report will show rejection due to lack of isolation.
(ii) The grower must harvest and deliver to a
					 department approved conditioning plant the seed from the certified portion of
					 the field separately from the seed from the isolation strip. After the seed is
					 weighed and logged in, the weight of the seed from the isolation strip is to be
					 reported to the seed program. At this time the seed program records will
					 indicate the field has passed certification.