42 
merits In apparent violation of the quarantine wore Intercepted by transit 
inspectors during the fiscal year and returned to ■nippers. Of these, 24 were 
found on Investigation to be noncommercial shipments by persona unawa 
the regulations. 
Berberii mentorensis Ames i.msi, a new hybrid of Berberit covered by 
Plant Patent No. 99, was added to the list of species determined as resistant 
to the rust, making B total Of 27 species that may be Bhipped under permit. 
The Bureau lias available for distribution lists showing (1) B. thunbergii and 
Its rust-immune horticultural varieties, which may he moved interstate with- 
out permit; ( L' ) BerberiS and MahOfUa species or varieties sulliCently re- 
sistant to black stem rust for shipment Into protected States; (3) Berberis, 
MahoniO) and Mahoberberis species or varieties which are susceptible to attack 
by black stem rust and which may not he moved into protected States; and 
(4) species or varieties of Jirrfuris or Mdhonia for which reaction to black 
stem rust attack has not been determined and which therefore may not be 
moved to protected States at least until their susceptibility to rust attack has 
been determined. 
Cuttings of Mahonia for decorative purposes only, Including hollygrape (Ore- 
gon grape), were removed from restrictions under a modification of the quaran- 
tine which became effective on February '20, 1935. The native species growing 
in the Northwestern States, and much used for decoration, have been deter- 
mined as resistant to the disease. 
BARBERRY ERADICATION 
Approximately 18,900 square miles of territory in the North Central grain- 
growing States was surveyed for common barberry bushes during the fiscal 
year, resulting in the eradication of more than 570,000 bush.es on 6,039 differ- 
ent properties. This work was a continuation of the public-works program 
for the prevention of stem rust undertaken In August lb.*;.".. Men employed 
to conduct the field work were obtained through the local reemployment offices, 
in accordance with the rules and regulations approved by the Public Works 
Administration. 
ORGANIZATION 
Fifteen states cooperated with the United states Department of Agriculture 
in the barberry-eradication program during the fiscal year. The work was 
conducted as a Federal project, with responsibility for general supervision 
resting with the Department. Because of the seasonal nature of the work, 
the permanent field personnel has been restricted almost entirely to a leader in 
charge and one clerk in each state. During the active field season approxi- 
mately 120 trained men were employed to supervise the work of laborers 
obtained through the reemployment offices. During the winter months, when 
weather conditions prevented held snrvey, a few trained men were retained 
to assist with the general informational program. 
SURVEY AND ERADICATION 
Eradication activities were centered In areas where bushes were known to 
be numerous and where local inexperienced men could be employed effectively. 
Crews consisting Of from 6 to K) men were supervised by foremen with previous 
training and experience In eradication procedure. The survey under way on 
July l was continued late Into December before weather conditions made 
further work of this type Impracticable Employing local men has proved 
effective, particularly in areas where bushes were aumerous. 
There are parts of Illinois, Minnesota, Wisconsin, Colorado. Iowa. Ohio, 
Indiana, and Michigan where barberries are plentiful, particularly along rivers 
and on other rough uncultivated lands, in some Instances it was found neces- 
sary to Burvej entire counties Intensively In order to establish boundaries of 
barberry Infestations and bring them under control. 
< >n the other band, in a lew of the western States of the area. Including 
the Dakotas, Montana. Wyoming, and Nebraska, the future problem is largely 
a clean-up, although the few hushes remaining in these Importanl wheat- 
growing states constitute not onlj a continuous rust hazard but a - 01 
further spread. The tinal .lean up of these BCattered bushes is an important 
part of t he ...Hi rol program. 
Table 15 summarizes (by states) the eradication data for the fiscal year. 
