FEDERAL HORTICULTURAL BOARD. 625 



tions do not apply to shelled corn and clean seed of ])room corn, nor to 

 other articles after they have been manufactured or processed in such 

 a way as to eliminate risk of carrying the corn borer. 



The quarantine of 1920 revises and supersedes the original quar- 

 antine of Massachusetts on account of this insect and was necessi- 

 tated by the discovery of the new important areas in New York in 

 the fall of 191S and the rather rapid increase of information as to 

 distribution, together with the discovery of many additional food 



Elants. The postponement of this revision until 1920 Avas occasioned 

 y the fact that the territory invaded by this insect was so inade- 

 quately determined as to make any quarantine comparatively value- 

 less. As a preliminary measure of control, however, the States of New 

 York and ^lassachusetts agreed through their representatives to 

 establish State quarantines covering the known invaded districts, so 

 that there should be no interstate movement of infested products 

 ^rom such districts and such quarantine orders were issued by the 

 commissioners of agriculture of New York and Massachusetts. 



The enforcement of the Federal quarantine, in cooperation with 

 correspcmding State quarantines which were promptly thereafter 

 issued, has been the chiel and about the only effective control possible 

 of this new pest b}- preventing or limiting its further spread through 

 the agency of the movement of infested farm and garden products. 

 The wide extent of this pest in Massachusetts and New York has pre- 

 vented, both on the ground of expense and uncertain efficiency, 

 general farm control over the entire regions infested, under Federal 

 and State funds. Limited control with such funds has been and may 

 be practicable and desirable in the future where the insect is found 

 in considerable concentration, but in general such farm control must 

 be assumed by the farmers concerned. 



ALL FOREIGN COUNTRIES QUARANTINED ON ACCOUNT OP THE EUROPEAN CORN BORER. 



The fui'tlier entry of broom corn, Indian corn, and related plants, 

 has been either prohibited or restricted in the quarantine promul- 

 gated February 21, 1920, for the pm-pose of preventing the further 

 entry into the United States of this corn borer or of other dangerous 

 insects or of plant diseases through the agency of stalks or other 

 portions of these ])lants. 



Broom corn for manufacturing jiurposes may be imported here- 

 after only under permit and when its condition is such that it can 

 be satisfactorily (fisinfectcd at port of entry. Indian corn and cer- 

 tain related plants from all foreign countries are denied entry into 

 the I'nited States in the raw or unmanufactured state, except 

 sorghum hay from Canada, and the shelled or thrashed grain from 

 any country, of the plants included in the quarantine. The quar- 

 antine a])plies also to such plants r(>lated to corn as sweet sorghums, 

 grain sorgiiums, sugar cane, Sudan grass, Johnst)n grass, pearl millet, 

 Napier grass, teosinte, and Job's teal's. 



The necessity for this quarantine was demonstrated early in the 

 year by the discovery of living larva; of the corn borer in some 97 

 bales of broom corn shipped from Italy to New York, the first con- 

 siderable shipment of foreign broom corn since the war period. 

 This finding, in connection with the association of (>arlier importa- 

 tions witji the infestetl areas in this country, would seem to deli- 



