feet of which no infestation has been found may be classified as class I. 
Upon compliance with the requirements of paragraph (11) of this regulation, 
nursery and ornamental stock may be certified by the inspector for shipment 
from such premises without further inspection, and without meeting the 
safeguards prescribed as a condition of interstate shipment of plants origi- 
nating in nurseries or greenhouses of class III. 
(6) Class III. — (a) Nurseries, greenhouses, and other premises concerned 
in the movement of nursery and ornamental stock on which either grubs 
in the soil or one or more beetles have been found, will be classified as class 
III, provided, (i) there are maintained on the premises subdivided class I 
areas, certified houses, frames, or plots or other certified areas, or (ii) there 
is a legitimate need for interstate or intradealer certification of such stock. 
Such classification will not be granted to nurseries, greenhouses, and other 
premises that do not maintain certified or subdivided areas and require only 
infrequent certification. Such classification also may be given to nurseries, 
etc., 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 par- 
cels may be independently classified either as class I or class III upon com- 
pliance with such conditions and safeguards as shall be required by the in- 
spector. Similarly, unit nursery properties, which would otherwise fall in 
class III, may be open to subdivision, for the purpose of rating such sub- 
divisions 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 in- 
festation shall be clearly marked by boundaries of a permanent nature which 
shall be approximately 500 feet beyond the point where the infestation occurs. 
(o) Upon compliance with paragraphs (7), (10), and (11) of this regulation, 
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 Entomology and Plant 
Quarantine in manner and by method satisfactory to the inspector; or (it) 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 (Hi) that it shall be shown by evidence satisfactory to the inspector 
that the plants concerned were produced in a certified greenhouse. 
(7) 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. 
(b) Prior to introduction into nurseries or greenhouses, sand, if contaminated 
with vegetable matter, 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 sand, soil, earth, peat, compost, or manure 
is not to be immediately 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 (i) 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 Entomology and 
Plant Quarantine to eliminate infestation; and (iv) shall comply with such other 
safeguards as may be required by the inspector. 
(8) Cut flowers 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 paragraph (3) of this regulation.) 
