158 EXPERIMENT STATION RECORD. [Vol. 41 



on Citrus nohilis material collected in 1863 at Nagasaki, Japan, and now in the 

 Hongkong Botanic Gardens herbarium. 



The problem of the imported plant disease as illustrated by the white pine 

 blister rust, H. Metcalf {Brooklyn Bot. Gard. Man., 1 (,1918), pp. 321-33d, pU. 

 2). — Attention is called to the danger and the possibilities that exist in the 

 plant disease situation as outlined and as illustrated by white pine blister rust for 

 3 sections of the United States. In the first of these, lying west of the Mississippi 

 River, this disease is not Imown to occur ; in the second, east of the Mississippi 

 River to the Hudson River, areas are indicated as heavily infected; in the 

 third, east of the Hudson River, the case is so desperate that only the elimina- 

 tion of all Ribes will save the pines. 



The overwintering- of Cronartium ribicola on Ribes, H. H. Yokk and P. 

 Spatjlding (Phytopathology, 8 (1918), No. 12, pp. 617-619). r— It is claimed that 

 C. ribicola may occasionally winter over on dead Ribes leaves, thus perpetuating 

 the fungus in localities where pines ai'e absent. 



Overwintering of the asciospores of Cronartium ribicola, L. Dosdall (Phy- 

 topathology, 8 (1918), No. 12, p. 619). — The author reports observing in April, 

 1918, a branch of white pine which was covered by a heavy infection of white 

 pine blister rust. The branch showed many secial scars, and a study of the ma- 

 terial is believed to have shown that the seciospores produced in 1917 still ger- 

 minated in the spring of 1918, thus indicating the overwintering of the rust in 

 this manner. 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



Eighteenth report of the State entomologist of Connecticut for the year 

 1918, W. E. Beitton (Connecticut State Sta. Bui. 211 (1919), pp. 249-352, pis. 

 16, figs. 7). — The first part of this report relates to administrative and regu- 

 latory work, including the inspection of nurseries, of imported nursery stock, 

 and of apiaries, with locality records of the occurrence of European and of 

 American foul brood in the State. Papers are next presented on Suppressing 

 the Gipsy and Brown-tail :Moths in 1918, by W. E. Britton, I. W. Davis, and J. 

 T. Ashworth (pp. 272-290) and on Record of Treatments in an Attempt to Con- 

 trol the Striped Cucumber Beetle (Diabrotica rittata), by W. E. Britton and M. 

 P. Zappe (pp. 290-292) which relates to work carried on in continuation of that 

 commenced several years ago. Of the several tr(\itments which gave favorable 

 results the first in the order of effectiveness is lead arsenate and powdered 

 sulphur, equal parts, dusted on both sides of the leaves. Spraying experiments 

 in orchards at Clintonville, by M. P. Zappe (pp. 292, 293) are in continuation 

 of those of the previous year (E. S. R., 39, p. 760), the results of which are 

 presented in tabular form. 



Tests of Sprays to Control the Potato Aphid, by W. E. Britton and M. P. 

 Zappe (pp. 294-297), a summarized account of which is noted on page 162, show 

 that kerosene emulsion will destroy all lice hit, while the materials cost about 

 half as much as nicotin and can be obtained at any grocery store, A summarized 

 account of the oriental peach moth (pp. 298-306) here presented is based upon 

 the papers by Wood and Selkregg (E, S. R., 39, p. 259) and by Garman (E. S. 

 R., 39, p. 260) ipreviously noted. 



In a report of studies of the peach twig moth it is stated that attention was 

 called to its presence in the State to an extent nt>t ))efore realized. The account 

 includes a bibliography of 22 titles. 



The Life History and Development of the Greenhouse Cockroach (Pyvnosccliis 

 surinamcnsis) , by M, P. Zappe (pp. 311-318) supplements a detailed account 

 previously noted (E. S. R., 39, p. 761). This paper includes descriptions of the 



