Washington Administrative Code
Title 16 - Agriculture, Department of (See also Titles 24, 60, and 142)
QUARANTINE ORDERS AND PLANT MOVEMENT
Chapter 16-472 - Barberry and black stem rust
Section 16-472-010 - Establishing quarantine - Promulgation

Universal Citation: WA Admin Code 16-472-010
Current through Register Vol. 24-06, March 15, 2024

The common barberry, (Berberis vulgaris) and many of its horticultural varieties as well as certain other species of Berberis, Mahonia, and Mahoberberis are the alternate host plants of the disease black stem rust, caused by the organism Puccinia graminis. Black stem rust attacks wheat, oats, barley, rye, and many other cultivated and wild grasses, often resulting in material financial loss to growers of these crops in Washington. Without access to alternate host plants, Puccinia graminis cannot reproduce, and black stem rust is eliminated or greatly decreased. The director of agriculture, under authority granted by chapters 17.24, 15.13 and 15.08 RCW, has determined that the regulation and exclusion of rust susceptible varieties of barberry and related Berberis, Mahonia, and Mahoberberis species is necessary to protect agricultural crops of the state of Washington.

Statutory Authority: Chapters 17.24, 15.13, and 15.08 RCW. 00-20-069, § 16-472-010, filed 10/3/00, effective 11/3/00; Order 556, effective 9/1/49.

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