In lieu of a formal Interior Quarantine to prevent the further spread of the disease "Yellow Leaf Roll of Peach", the agricultural commissioners in the southern California area have established restrictions on the movement of host material from infested counties.

Counties Enforcing Restrictions

Imperial, Kern, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, and Ventura.

Infested Regulated Area

The entire counties of Butte, Fresno, Kings, Madera, Merced, Placer, San Joaquin, Stanislaus, Sutter, Tulare, Yuba, and any other county subsequently found infested with this disease.

Regulated Articles

Peach and nectarine trees (Prunus persica and P. persica var. nectarina), including their flowering forms, and all parts of these trees for or capable of propagation except fruit pits and registered trees or budwood identified by an official state tag and seal.


Regulated articles will be subject to rejection under Section 6521 of the California Food and Agricultural Code when moved from the infested regulated area to southern California unless authorized under certificate issued by the agricultural commissioner at origin or when accompanied by a California Nursery Stock Certificate.

In addition, if host plants are authorized shipment by the nursery stock certificate, the origin agricultural commissioner shall annually forward to each county enforcing restrictions, a list of qualified shippers.

Conditions for Issuance of Certificates

Trees were produced outside infested regulated area and have not broken dormancy while inside this infested area; or

A. trees were inside infested regulated area at least 300 feet from any commercial pear or cherry fruit-producing planting; and

B. an insect vector control program especially effective against leafhoppers was practiced on the growing-ground premises using control measures satisfactory to commissioner; and

C. trees were inspected in the nursery row at the time most appropriate for detection of yellow leaf roll symptoms and any infected trees were destroyed; and

D. Trees were propagated from buds, cuttings or scions secured outside the regulated area, or secured within the regulated area, under conditions satisfactory to the agricultural commissioner at origin.