256 BUREAU OF PLANT QUARANTINE [Oct .-Dec. 
the soil or one or more beetles have been found, will be classified as class III. 
Such classification also may be given to nurseries, etc., in localities known 
to be generally infested where one or more beetles or grubs are found in the 
immediate proximity (within approximately 500 feet) of such nurseries, etc., 
on adjacent property or properties. In the case of nursery properties, under 
single ownership and management, but represented by parcels of land widely 
separated, such parcels may be independently classified either as class I 
or class III upon compliance with such conditions and safeguards as shall be 
required by the inspector. Similarly, unit nursery properties, which would 
otherwise fall in class III, may be open to subdivision, for the purpose of 
rating such subdivisions in classes I or III, when in the judgment of the 
inspector such action is warranted by recent and scanty infestation limited to 
a portion of the nursery concerned: Provided, That the subdivision containing 
the infestation shall be clearly marked by boundaries of a permanent nature 
which shall be approximately 500 feet beyond the* point where the infestation 
occurs. 
(&) Upon compliance with subsections (3) and (6) of this section, nursery 
and ornamental stock may be certified by the inspector for shipment from such 
premises under any one of the following conditions: (i) That the roots shall 
be treated by means approved by the Bureau of Plant Quarantine in manner 
and by method satisfactory to the inspector; or (u) in the case of plants 
in which the root system is such that a thorough inspection may be made, 
that the soil shall be entirely removed from the stock by shaking or washing, 
or (tit) that it shall be shown by evidence satisfactory to the inspector that 
the plants concerned were produced in a certified greenhouse. 
(3) Greenhouses of class III may be certified upon compliance with all the 
following conditions with respect to the greenhouses themselves and to all 
potting beds, heeling-in areas, hotbeds, coldframes, and similar plots: 
(a) Ventilators, doors, and all other openings in greenhouses or coldframes 
on premises in class III shall be kept screened in manner satisfactory to the 
inspector during the period of flight of the beetle, namely, south of the northern 
boundaries of Maryland and Delaware between June 1 and October 1, inclusive, 
or north thereof between June 15 and October 15, inclusive. 
(&) Prior to introduction into nurseries or greenhouses, sand, soil, earth, 
peat, compost, or manure taken from infested locations or which may have been 
exposed to infestation, must be sterilized or fumigated under the direction 
and supervision of, and in manner and by method satisfactory to, the inspector. 
If such treated sand, soil, earth, peat, compost, or manure is not to be imme- 
diately used in such greenhouses, it must be protected from possible infestation 
in manner and by method satisfactory to the inspector. 
(c) All potted plants placed in certified greenhouses of class III and all 
potted plants to be certified for interstate movement therefrom (t) shall be 
potted in certified soil; (ii) shall, if grown outdoors south of the northern 
boundaries of Maryland and Delaware at any time between June 1 and 
October 1, inclusive, or north thereof at any time between June 15 and 
October 15, inclusive, be kept in screened frames while outdoors; {Hi) shall, 
if grown outdoors during any part of the year, be placed in beds in which 
the soil or other material shall have been treated in manner and by method 
approved by the Bureau of Plant Quarantine to eliminate infestation : and 
(iv) shall comply with such other safeguards as may be required by the 
inspector. 
(4) Cut flowers and other parts of plants without roots or soil may be 
certified for movement either (a) when they have been inspected by an 
inspector and found free from infestation, or (6) when they have been grown 
in a greenhouse of class I or in a certified greenhouse of class III and are 
transported under such safeguards as will, in the judgment of the inspector, 
prevent infestation. (See also section A (3) of this regulation.) 
(5) Nursery and ornamental stock originating on or moved from unclassi- 
fied premises may be certified by the inspector under either one of the fol- 
lowing conditions: (a) That the soil shall be entirely removed from the 
stock, or (6) that the roots shall be treated by means approved by the Bureau 
of Plant Quarantine in manner and by method satisfactory to the inspectors, 
or (c) that it shall be shown by evidence satisfactory to the inspector that 
the accompanying soil was obtained at such points and under such conditions 
that in his judgment no infestation could exist therein. 
(6) Nurserymen, florists, dealers, and others, in order to maintain their 
classified status, (a) shall restrict their purchases or receipts of nursery and 
