BUREAU OF PLANT QUARANTINE 
61 
years, a total of 36,821,485 plants were released from further observation. This 
total represents imported plant material and its increase produced during the 
two or more growing seasons it was under observation, which was found to be 
apparently free of important plant pests likely to become established in this 
country. 
During the fiscal year 650 collections of plant pests were sent in for verifica- 
tion and determination, 461 of which were diseases and 189 insects. Among 
the more interesting pests found were the following: Nematodes — Tylenchus 
dipsaci in bulbous iris in California, Michigan, New York, and North Carolina 
and in narcissus in Maryland, New York, North Carolina, and Washington, root 
knot (Heterodera marioni) in bulbous iris Wedgewood, a new host; diseases — 
Botrytis convoluta on Iris susiana in California, Hemileia oncidii on orchid in 
Hawaii, mosaic or mosaiclike symptoms on azalea, camellia, dahlia, Eremurus 
spp., iris, narcissus, orchid, peony, rhododendron, and tigridia, Puccinia iridis 
on Iris spp. in California, and on 7ns sp. in Louisiana, Stagonospora curtisii on 
Nerine spp., Uredo nigropunctata on orchid in Maryland, and Urocystis colchici 
in Delaware, Ohio, Pennsylvania, and Washington on Colchicum spp.; insects — 
Bregmatothrips iridis (thrips) on iris, Eumerus sp. (Syrphidae) in narcissus and 
Valotta purpurea (Scarboro-lily) , Frankliniella sp. (thrips) on Hemerocallis sp. 
(daylily), Lepidosaphes tuberculata (Coccidae) on orchid, Merodon equestris (nar- 
cissus-bulb fly) in narcissus, and Taeniothrips gladioli (gladiolus thrips) on glad- 
iolus and Tritonia sp. 
INSPECTION OF PLANT-INTRODUCTION AND PROPAGATING GARDENS 
As heretofore, plants grown and distributed by the Bureau of Plant Industry 
from its plant-introduction and propagating gardens were inspected and certified 
prior to shipment. Plants shipped from Mandan, N.Dak., Chapman Field, Fla., 
and Chico, Calif., were inspected by officials of the States concerned cooperating 
with this Bureau. Those distributed from Savannah, Ga., were examined by 
an inspector of this Bureau. Table 37 indicates the number of plants inspected 
and certified for distribution. 
Table 37. — Number of plants, bud sticks, cuttings, tubers, roots, and shipments of 
seeds examined for distribution from plant-introduction and propagating gardens, 
fiscal year 1938 
Station 
Plants 
Bud sticks, 
cuttings, 
tubers, and 
roots 
Shipments 
of seeds 
Bell 
27,949 
16,012 
6,021 
1,027 
5,838 
253, 210 
38 
421 
532 
181 
22 
50, 449 
1 
Chico . 
21 
Chapman Field 
94 
Savannah 
District of Columbia 
4,298 
Mandan, N.Dak 
Beltsville 
6,642 
Total 
310, 095 
58, 247 
4,414 
INTERCEPTIONS OF PROHIBITED PLANTS AND PLANT PRODUCTS 
A record of the number of interceptions of prohibited plants and plant products 
made by inspectors and collaborators of the Bureau at all ports appears in table 
38. Many of these interceptions were found to harbor insect pests and plant 
diseases, and many others, while no infestation or infection was noted, must be 
considered potentially dangerous since they came from countries where pests not 
present in this country are known to occur. For example, 1,723 interceptions, 
representing 21,424 individual units of known hosts of the Mediterranean fruit 
fly, from countries where that insect is reported to occur, were made. 
Interceptions made at footbridges, ferries, and crossings a1 fche Mexican and 
Canadian border port- have all been listed as having been taken from bag| 
