June 1938] SERVICE AND REGULATORY ANNOUNCEMENTS / 
typical. In the case of plant pathogens the fruiting stages necessary for a deter- 
mination may be lacking. While a few intercepted insects in immature stages 
have been reared at times and on rare occasions plant-disease organisms have 
been cultured and their identity established, there is no provision for the routine 
determination of immature insects by rearing or of plant disease- by culturing. 
While it is possible to determine many well-known pests in any stage of develop- 
ment, it would lie highly desirable to make more comprehensive studies of un- 
known insects and diseases which cannot be determined by the means available 
and which may be potentially dangerous. This is especially true of plant patho- 
gens, which are so often present in forms that are not detected by practicable 
.ueneral inspection methods. 
INSECTS 
Of the insect pests intercepted a total of 266 could be determined to family, 
subfamily, or tribe, only. A total of 6.092 other lots of insect pots, determined 
to genus only, were distributed among 667 genera. The largest number of inter- 
ceptions included under any one of these 667 genera is 620 under Frankliniella, 
which arrived from 10 countries on 80 different hosts. Under Pst "lococcus sp. 
there are records of 300 interceptions from a total of 41 countries and 104 ho>ts. 
Under Euxcsta sp. there were 101 interceptions from 19 countries and associated 
with 42 different hosts. Ceuiorhynchus sp. was intercepted 113 times from 14 
countries on 10 hosts. Chrysomphalus sp. was taken 135 times from 21 countries 
on 31 hosts. Under Diaspis sp. there were 117 interceptions from 13 countries 
and 12 hosts. Curculio sp. arrived 97 times from 14 countries on 6 hosts. Dia- 
traca sp. was intercepted 95 times from 5 countries on 4 hosts. Conotrachelus sp. 
arrived 90 times from 9 countries on 13 hosts. Under Haplothrips sp. there were 
79 interceptions from 8 countries on 20 hosts. Empoasca sp. was taken 71 times 
from 6 countries on 26 hosts. Under Diaphanin sp. there were 70 interceptions 
from A countries on 7 hosts. 
DISEASES 
While many of the common disease organisms are no longer reported in all 
cases, the total of interceptions of Fusarium sp. recorded was 2.060 from 79 
countries or geographic subdivisions. Eighteen other genera were intercepted 
25 or more times and not determined to species. Thirty-five genera were repre- 
! by one interception only, and 44 additional genera were represented 
by fewer than 10 interceptions each. Interceptions of Gloeokporium deter- 
mined to genus only totaled 182 on 55 hosts belonging to 35 genera and on 
material from 31 countries or geographic subdivisions, including every continent. 
Undetermined interceptions of the closely related genus Colletolrichum totaled 
32 on 15 hosts belonging to 12 genera and on material from 11 countries. There 
were 32 interceptions of Sclerotium sp. on 2' hosts belonging to 21 genera and 
on material from 13 countries. Phjillosticta sp. was intercepted 2,S limes on 24 
hosts, all different genera, and from 18 countries. Undetermined interceptions 
of the related genus Phoma totaled 39 on 21 hosts belonging to 22 genera and 
on material from 18 countries. Fifty-two interceptions of ''mosaic'' were made 
on plant materials from Cuba and are included as determined to genus only. 
One hundred and eight genera are represented in this group of incompletely 
determined pathogens. Total of these interceptions, 4,828. 
ENTOMOGENOUS FUNGI 
Some beneficial fungi, particularly those attacking insects, were found in the 
course of inspection of imported plants. These entomogenous fungi included 
Aegerita webberion Dialeurodes citrifolii on citrus from. Tuba; Aschersonia aleyrodis 
on Dialeurodes citri on citrus from Bahamas; .1. cubensis on ('ocrus hesperidum 
on guava from Cuba: Cephalosporium lecanii on ( occus virtdis on coffee from Cuba 
and Jamaica; Hirsutella sp. on leaf beetle on coffee from Jamaica; Myriangium 
duriaei on Lepidosaph.es beckii on orange from Cuba and Jamaica: Nectria diploa 
on Aonidiella aurantii on orange from Cuba, on Chrysomphalus aonidum on 
orange from the Bahamas, on Jschnaspis longirostris on Ficus nitida from Cuba, 
on Lepidosaphes beckii on citrus from Costa Rica, Cuba, and Jamaica, and on 
Pseuaaonidia articulaius on orange from Haiti; Ophionectria coccicola on unde- 
termined host on citrus and on gardenia from Mexico; and Scoleconectria coccicola 
on undetermined host on citrus from Mexico. 
