Section 001-30-II - CONTROLLED PESTSA. Columbia Root Knot Nematode (Meloidogyne chitwoodi). 1. The following areas are controlled under these rules as either quarantine or regulated areas. a. Quarantine areas. Quarantine areas shall consist of the states of Oregon, Washington and Idaho; the county of Humboldt of the State of Nevada; the counties of Siskiyou and Modoc of the State of California; the county of Rio Grande of the State of Colorado; the county of Iron of the State of Utah; the county of Westmoreland in Virginia.b. Regulated areas. Regulated areas shall consist of all areas within the states of California and Nevada lying outside of and distinct from the quarantine areas of these states defined in paragraph I.A.1.a.B. Bacterial ring rot (Clavibacter michiganense pv. sepedonicum or Corynebacterium sepedonicum). 1. Bacterial ring rot is a quarantined plant disease. Regulated commodities infected by or contaminated with this disease may not enter the State regardless of the area of origin.01-001 C.M.R. ch. 30, § II