SERVICE A^^ REGULATORY ANNOUNCEMENTS 5 
Mycosphaerella hrassicicola (4 — 9), M. pinodes (9 — 21), Oospora lactis parasitica 
(10 — 78), Penicillium digitatum (18 — 98), P. expansum (14 — 36), P. gladioli 
(3 — 1,597), P. italicum (18 — 58), Peronospora parasitica (4 — 5), Pestalozzi guepini 
(7 — 29), Phoma destructiva (10—850), Phomopsis citri (31 — 156), P. vexans (9 — 
295), Phytophthora infestans (13 — 62), Puccinia graminis (18 — 152), P. menthae 
(5 — 11), P. rubigo-vera (10 — 33), Pythium debaryanum (1 — 17), Rhizopus nigricans 
(34 — 652), Sclerotinia gladioli (3 — 403), S. sclerotiorum (17 — 32), Sclerotium 
oryzae (6 — 13), S. rolfsii (7—23), Septoria apii (17—38), S. petroselini (7—38), 
Spondylocladium atrovirens (28 — 182), Spongospora subterranea (9 — 20), Uromyces 
phaseoli typica (4 — 251), Venturia inaequalis (32 — 189), V. pyrina (7 — 18), 
Verticillium cinnabarina (19 — 58). 
Total recorded interceptions of these common diseases, 15,131. 
INCOMPLETELY DETERMINED PESTS 
Some interceptions are not determined to species because they are new and un- 
described, others because descriptions are fault}* and authentic material is not 
available for comparison, but a large part of the incompletely determined material 
could not be determined because it was not in the right stage or was not in good 
condition or was of such a nature that determination would require more work 
than the probable value of the determination seemed to warrant. A few notes 
regarding some of these interceptions should be of interest. 
INSECTS 
Of the pests intercepted a total of 67 could be determined to family, subfamily, 
or tribe only. A total of 5,613 other lots of insect pests, determined to genus 
only, were distributed among 1,159 genera. 
DISEASES 
Many of the fungi infecting plant material offered for entry are in a nonfruiting 
condition and could not be determined without culturing them. Since the Divi- 
sion of Foreign Plant Quarantines of this Bureau is not prepared to do routine 
culture work or to get it done, these must remain undetermined for the most part. 
Fungi found on special-permit plants are sometimes fruiting in some stage, but 
the material is often so scanty that it cannot be studied properlv. A few bacterial 
diseases are determinable on the basis of their symptoms. Others must remain 
undetermined. There is no practicable means for inspecting most imported 
plant material for the possible presence of virus diseases or for determining the 
identity of viruses if detected. 
Fungi not determinable by inspectors are sometimes referred to specialists for 
examination. The following notes are based on reports covering a few such 
specimens among those the specialists were unable to determine to species. 
Ascochyta sp., either undescribed or not reported as occurring on orchids, was 
intercepted at Seattle in March 1940 on Cymbidium crassifolium, C. parishii, 
Cypripedium callosum, C. fairrieanum, C hirsutissimum, C. parishii, and C 
spicerianum in mail shipments from India. Coniothyrium sp. with spores smaller 
than those of either species reported on orchids was intercepted at San Francisco 
in December 1939 on Epidendrum sp. in cargo from Mexico. Coryneum sp., 
which does not agree with C. rhododendri or C. triseptatum, was intercepted at 
Seattle in January 1940 on Rhododendron sp. in cargo from Canada. An unde- 
termined Diplodia (or Microdiplodia) with spores measuring about 3 by 8 microns 
was found on a lemon from Italy in July 1939 at New York, in stores. Gloeospor- 
ium sp. (no species reported on host) was intercepted at San Francisco the latter 
part of June 1939 on Caralluma sp. in mail from Mozambique. An undetermined 
species of Gloeosporium was found on Typha sp. used as packing for fish coming 
in from Mexico during October, November, and December, 1939, at El Paso. 
The spotting has been noted frequently but the scanty sporulation on this material 
is the only time the fungus had developed sufficiently to permit even a partial 
determination. Macrosporium sp. with smaller spores than those of M. camelliae 
was intercepted at Seattle in December 1939 on Camellia japonica in cargo from 
Japan. Mycosphaerella sp., apparently not M. gardeniae, was intercepted at 
Brownsville in December 1939 on Gardenia florida in baggage from Mexico. 
Myxosporium sp., apparently undescribed, was intercepted at Seattle in December 
1939 and at San Francisco in February and March 1940 on Camellia japonica 
in cargo from Japan. Myxosporium sp., no species reported on the host, was 
found at New York in May 1939 on Euphorbia sp. among ship's furnishings from 
