Bur. Ent. & P. Q. 
Issued May 1939 
United States Department of Agriculture 
BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
SERVICE AND REGULATORY ANNOUNCEMENTS 
LIST OF INTERCEPTED PLANT PESTS, 1937 
(List of Pests Recorded During the Period July 1, 1936, to June 30, 1937, In- 
clusive, as Intercepted in, on, or with Plants and Plant Products Entering 
United States Territory.) 
INTRODUCTION 
The period covered by this report represents the twenty-fourth year for which 
lists of intercepted plant pests have been issued. While the earlier reports gave 
the details regarding practically all organisms found on the plant material in-' 
epected, the present paper omits many organisms entirely and summarizes the 
interceptions of many common or incompletely determined pests in short para- 
graphs, hence the detailed table contains only a fraction of the total findings. 
This report is based on interceptions for which determinations were received 
and indexed during the fiscal year. Determinations for collections made late in 
the year are often received after the close of the year and are included with those 
of the following year. The summarized records cover pests intercepted in, on, 
or with plants and plant products (1) imported, (2) offered for but refused entry, 
(3) held as ships' stores, etc., and hence not imported through customs, (4) offered 
for entry for immediate export or for immediate transportation and exportation in 
bond, and (5) in domestic shipments reaching the mainland from Hawaii and 
Puerto Rico. 
A cross-indexed file covering the more important and interesting interceptions 
is maintained in Washington and serves as the basis for this list. State and 
customs officials collaborate with the Bureau and supplement routine reports of 
regular employees. Determinations of some of the commoner pests are made by in- 
spectors familiar with them, but most of the insects are determined by specialists of 
the Bureau and most of the more difficult determinations of plant diseases are made 
or verified by specialists of the Bureau of Plant Industry. Staffs of specialists 
maintained by the States of California and Florida and the Territory of Hawaii 
make a large part of the determinations for interceptions at their ports. 
Statements as to the origin of plant materials inspected cannot be verified in 
some cases, but every effort is made to determine the origin as accurately as 
possible. Items that are obviously doubtful are not listed from any country. 
In this connection it may be noted that where holds and storage chambers are not 
thoroughly cleaned at frequent intervals, pests able to propagate under such 
conditions may be found attacking products of countries in which the pests do 
not occur. 
NOTES ON INSECTS INTERCEPTED 
FRUITFLIES 
The following fruitflies were intercepted: Anastrepha grandis in pumpkin 
from Argentina^ and (adult) with banana debris from Panama; Mexican fruitfly 
{A. ludens) in orange and sapodilla from Guatemala, mango from Honduras, 
and avocado, cherimoya, grapefruit, guava, mamey, mango, orange, peach, pear, 
pomegranate, quince, sour orange, sweet lime, tangerine, and white sapote from 
Mexico; A. mombinpraeoptans in Malayapple from Dominican Republic, mango 
from Haiti, and guava, mango, and orange from Puerto Rico; A. silvai (adult) 
with banana debris from Panama; A. striata in guava from Mexico; A. suspensa 
in guava from Dominican Republic; Anastrepha sp. in mango from Bahamas, 
Costa Rica, Cuba, Guatemala, Haiti, Jamaica, Mexico, Puerto Rico, and Trinidad, 
loquat from Bermuda, grapefruit and orange from Brazil, star-apple from Co- 
lombia, orange from Guatemala, rose apple and star-apple from Honduras, 
apple, grapefruit, guava, mamey, orange, peach, pear, sapodilla, sapote, and 
sweet lime from Mexico, guava from Puerto Rico, and Lucuma obovata from the 
> For details of interceptions mentioned in the text see lists under the countries named. 
113990—39 1 
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