102 BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE [Oct.-Deo. 
Central America, the West Indies, and South America. This quarantine also 
brings under restriction, involving inspection at will by the Department but re- 
quiring no permit or certificate, the following when used as packing: Cereal straw, 
chaff, and hulls (other than rice); corn and allied plants from Mexico, Central 
America, the West Indies, and South America; willow twigs from Europe; grasses, 
hay, and similar plant mixtures, from all countries; and authorized soil packing 
materials from all countries. This quarantine does not cover such widely used 
packing materials as excelsior, paper, sawdust, ground cork, charcoal, and various 
other materials. 
Dutch elm disease. — Quarantine No. 70, revised, effective January 1, 1935: 
Forbids the importation from Europe, on account of a disease due to the fungus 
Graphium ulmi, of seeds, leaves, plants, cuttings, and scions of elm or related 
plants, defined to include all genera of the family Ulmaceae; logs of elm and related 
plants; lumber, timber, or veneer of such plants if bark is present on them; and 
crates, boxes, barrels, packing cases and other containers, and other articles 
manufactured in whole or in part from the wood of elm or related plants if not free 
from bark. 
OTHER RESTRICTIVE ORDERS 
The regulation of the entry of nursery stock from foreign countries into the 
United States was specifically provided for in the Plant Quarantine Act. The 
act further provides for the similar regulation of any other class of plants or plant 
products when the need therefor shall be determined. The entry of the plants 
and plant products listed below has been brought under such regulation. 
Nursery stock.- — The conditions governing the entry of nursery stock and other 
plants and seeds from all foreign countries and localities are indicated above 
under "Foreign plant quarantines." (See Quarantine No. 37, revised.) 
Potatoes.- — The importation of potatoes is forbidden altogether from the 
countriesffenumerated in the potato quarantine. Potatoes may be admitted from 
other foreign countries under permit and in accordance with the provisions of 
Xjthe i^ulatrons issued under order of December 22, 1913, bringing the entry of 
^potatoes under restriction on account of injurious potato diseases and insect 
pests. Importation of potatoes is now authorized from the following countries: 
The Dominion of Canada, Bermuda, Cuba, Dominican Republic, Estonia, and 
Spain, including the Canary Islands; also from the States of Chihuahua and Sonora 
and the Imperial Valley of Baja California, Mexico. The revised regulations 
issued under this order, effective March 1, 1922, were amended effective August 1, 
1930, so as to permit, free of am?- restriction whatsoever under the Plant Quaran- 
tine Act, the importation of potatoes from any foreign country into the Territory 
of Hawaii for local use only, and from the Dominion of Canada into the United 
States or any of its Territories or Districts. 
Cotton. — The order of April 27, 1915, and the rules and regulations issued 
thereunder, revised effective February 24, 1923, amended effective May 1, 1924, 
and December 15, 1924, restrict the importation of cotton from all foreign 
countries and localities, on account of injurious insects, including the pink 
bollworm. These regulations apply in part to cotton grown in and imported 
from the Imperial Valley, in the State of Baja California, Mexico. 
Cottonseed products. — The order of June 23, 1917, and the rules and regula- 
tions issued thereunder, effective July 16, 1917, amended effective August 7, 1925, 
restrict the importation of cottonseed cake, meal, and all other cottonseed 
products, except oil, from all foreign countries; and a second order of June 23, 
1917, and the regulations issued thereunder, restrict the importation of cotton- 
seed oil from Mexico on account of injurious insects, including the pink bollworm. 
Plant safeguard regulations. — These rules and regulations, revised effective 
December 1, 1932, provide safeguards for the landing or unloading for transfer 
and transportation and exportation in bond of restricted or prohibited plants 
and plant products when it is determined that such entry can be made without 
involving risk to the plant cultures of the United States, and also provide for 
the safeguarding of such plant material at a port or within the territorial limits 
of the United States where entry or landing is not intended or where entry has 
been refused. 
Rules and regulations governing the movement of plants and plant products into 
and out of the District of Columbia. — These rules and regulations, revised effective 
April 30, 1931, are promulgated under the amendment to the Plant Quarantine 
Act of May 31, 1920. They provide for the regulation of the movement of 
plants and plant products, including nursery stock, from or into the District of 
Columbia and for the control of injurious plant diseases and insect pests within 
the said District. 
