KXTOMOLOGY AND PLANT QUARANTINE 47 
work accurate idontifioation of all barberries enconntered by Federal (iiiarantine 
inspectors, State nursery inspectors, and eradication supervisors is extremely 
important. The taxtiuomic work is carried on at the Arnold Arboretum, Jamaica 
Plain, Mass., where the best facilities are available. As previously indicated, 
the genus Berberis contaihs a great many species, varieties, and liybrids, and, 
further to complicate field work, many of the species and variety names in com- 
mon use are synonyms. 
During 1{>3G more than 20O Bcrhcris and Mahonia specimens were submitted 
to the Bureau for identification by field inspectors and property owners. In 
addition, some 200 questionable bushes were identified in the field. During the 
year the key used in classifying barberry specimens was enlarged to include 
more than 280 species, varieties, and hybrids. 
Records show that during 1936 22 nurseries applied for permits to sliip immune 
barberries into and between States protected by the Federal quarantine. Prior 
to granting this authority. 4.740 acres of nursery stock were inspected with Ihe 
result that 137 rust-susceptible barberries were destroyed. Twenty-one nursery- 
men were authorized to ship immune species of barberry interstate and one 
nurseryman was given a dealer's permit for the same purpose. In addition to 
the bushes destroyed in nurseries, the Federal nursery inspector, in cooperation 
with State nursery inspectors and State leaders of barberry eradication, removed 
950 susceptible barberries from parks, arboretums, and private grounds within 
the barberry-eradication area. 
BARBERRY ERADICATION AIDED BY INFORMATIONAL ACTIVITIES 
During 1936 the steadily increasing demands for information relating to the 
control of stem rust of cereals were met by (1) releasing approved magazine 
articles, (2) giving illustrated talks before school and adult groups. (3) placing 
demonstrations at seed shows and local fairs, (4) distributing brief circulars in 
advance of field operations, and (5) carrying on a cooperative educational pro- 
gram with public schools. The twofold purpose of the educational work is to 
stimulate property owners to keep their farms free of rust-susceptible barberry 
bushes once the initial eradication work has been completed, and to encourage 
the reporting of badly rusted grainfields or areas known to be infested with 
barberry bushes as a guide to communities in which survey work is urgently 
needed. 
Table 14 summarizes results of informational work conducted during the period 
1928 to 1937. Many elementary and high schools throughout the north-central 
part of the United States are now including the study of stem rust as a pan of 
the regular course work in agriculture or general science. 
Table 14. — Summary of results of informational icork, by States. July 1, 1928, 
to June 30, 1937 
Demonstrations given 
Counties 
Total 
Total 
Total 
state 
com- 
Schools 
atten- 
properties 
bushes 
pleted 
Grade 
All 
and other 
dance 
reported 
reported 
schools 
schools 
organiza- 
tions 
Number 
Number 
Number 
Number 
Nximber 
Number 
dumber 
Colorado 
22 
852 
1.013 
1,018 
31,853 
35 
307 
Illinois 
20 
2, 348 
2, 485 
2,540 
57, 562 
355 
464 
Indiana 
33 
1.021 
1,699 
1,764 
134,211 
159 
795 
Iowa..- 
35 
4, 041 
4. 761 
4, 879 
477. 989 
886 
82,040 
Michigan... 
25 
2, 945 
3, 322 
3, 383 
893, 401 
799 
7,197 
Minnesota 
35 
3,911 
4, 232 
4, 747 
183,816 
570 
3, 450 
Missouri 



5 
955 


^Montana 
27 
1,971 
2,067 
2, 075 
54,314 
37 
115 
Nebraska. . 
24 
2,116 
2, 275 
2, 321 
51, 425 
102 
1,439 
North Dakota 
22 
3, 425 
3, 727 
3, 749 
89. 077 
27 
222 
Ohio 
8 
419 
530 
552 
23, 184 
123 
2,813 
South Dakota - 
18 
1,701 
1,885 
1,965 
82, 392 
42 
115 
Wisconsin 
2 
286 
300 
318 
7, 527 
109 
279 
"Wyoming. 
9 
446 
494 
505 
11,488 
10 
49 
Total 
280 
25, 482 
28, 790 
29, 821 
2, 099, 194 
3,254 
99,285 
