G36 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE. 



sect pests and ]>lnnt disonso quarantine, and the stocks, cuttings, 

 scions and buds of fruits quarantine. 



The European corn Lorer, Japanese beetle, and the gipsy moth 

 and l)ro^^^ltall motli quarantines were revised to cover the additional 

 territory invaded by these pests during the year. 



The ^European corn-borer quarantine, which originally applied 

 only to a restricted area in eastern Massachusetts, has been extended 

 to include the States of New Hampshire, New York, and Pennsylvania. 



In the case of the gipsy motn and broAvn-tail moth quarantine, 

 the range of the gipsy moth was extended considerably, especially 

 westward, owing to favorable winds. With respect to the bro%^Ti-tail 

 moth, however, it was found possible to materially reduce the ter- 

 ritory quarantined on account of this pest. The heavy mortality 

 of the pest in the brown-tail webs during the winter, the work of 

 introduced parasites, direct field work against the insect, and the 

 work of the brown-tail fungus were all contributing factors in the 

 reduction of the area infested by the brown-tail jnoth. 



AMENDMENT TO PLANT QUARANTINE ACT AUTHORIZING CONTROL OF PLANTS AND 

 PLANT PRODUCTS FOR THE DISTRICT OF COLUMBIA. 



The proposed amendment to the plant quarantine act, which was 

 submitted to the last two Congresses, was approved by the last 

 Congress in connection with the act making appropriations for this 

 department for the fiscal 3'^ear ending June 30, 1921. It has for 

 its purpose the giving of authority to regulate the movement of 

 plants and plant products, including nursery stock, from or into the 

 District of Columbia, and to control injurious plant diseases and in- 

 sect pests within said district. These powers are such as are exer- 

 cised in practicall}^ all the States and territories of the United States 

 and are necessaiy for the alignment of the District of Columbia with 

 plant-pest control exercised elsewhere. Prior to the enactment of 

 this amendment there was no law under which such control could 

 be exercised in the District of Columbia. As a result at least one 

 and perhaps other important fruit and plant pests have gained entry 

 and spread into adjacent States through the District of Columbia. 



In pursuance of the authority given by this amendment, rules and 

 regulations governing such movement of plants and plant products 

 into and out of the District of Columbia, effective on and after 

 September 1, 1920, were promulgated by the Secretary of Agriculture 

 August 26, 1920. 



Under the authority of this act also terminal inspection of mail 

 shipments of plants and plant products received in the District of 

 Columbia has been established under the act of May 4, 1915, em- 

 bodied in section 478J, Postal Laws and Regulations. The plants 

 and plant products subject to terminal inspection in the District of 

 Columbia are described as follows : 



All florists' stock, trees, shrubs, vines, cuttings, grafts, scions, buds, fruit pits and 

 other seeds of fruit and ornamental trees or shrubs, and other plants and plant products 

 in the raw or unmanufactiu-ed state, except vegetable and flower seeds. 



CONVICTIONS FOR VIOLATIONS OF THE PLANT QUARANTINE ACT. 



During the year reports were received from the Solicitor of the 

 department of the conviction of two shippers for violations of the 

 plant quarantine act, one in regard to the gipsy moth and brown- 

 tail moth quarantine, and the other in regard to the white pine 

 blister rust quarantine. 



