154 EXPERIMENT STATION RECORD. [Vol. 40 



Suggestions for marketing small timber in Wisconsin, B. MacKate (Wit. 

 Conserv. Com. Bui. 4 (1918). pp. 32. pi. 1, figs. 5).— This bulletin was prepared 

 under the direction of the Wisconsin Conservation Commission in cooperation 

 with the Forest Service of the U. S. Department of Agriculture. Lt contains a 

 tabular list of commodities made from crude products of different woods, and a 

 list of wood-using firms in the State, together with suggestions for selecting 

 the most profitable market for different crude products. Cooperative marketing 

 is also briefly discussed. 



A list of forest products statistics issued by the Statistical Clearing House, 

 Central Bureau of Planning and Statistics (Washington. D. C: War Indus. 

 Dd. [U. S.], 1918. pp. 58). — This bulletin was prepared under the direction of 

 the War Industries Board. It shows the principal sources of statistics on 

 forest products, including both original and secondary sources and the various 

 Government offices in Washington from which the tabulations may be secured 

 by properly accredited persons. 



DISEASES OF PLANTS. 



Weather conditions and crop diseases in Texas, F. H. Bi onr.ETT ( ^fcm. 

 Torrey not. club, n (1918), pp. 74-78).— Following the storm of Angusl 18, 



1915, the damage to cotton by anthracnose (Glomcrcila gouypH) was directly 

 related to the distribution of rainfall during the storm period. In 1010. local 

 factors were more generally permitted to express themselves as distinct ele- 

 ments of their environment Anthracnose or bacterial spot affected s per cent 

 of the cotton bolls mar Hillsboro. Humidity appeared to be a factor, this 

 applying to area! distribution as well as to periodic recurrence <>f precipitation. 

 Seasonal distribution of rainfall is said to be specially important in connection 

 with cotton anthracnose under Texas conditions. 



Dwarfing or stunting as a factor inducing disease was indicated in a series of 

 counts near Dallas. The occurrence of conditions specially favoring the epi- 

 demic development of an infrequent disease was illustrated in the case of 

 l.cidium g08sypii appearing in Hidalgo County. The alternate host was not 

 discovered. Cotton fields which were nearly ready to show first blooms suffered 

 severely. Date of Irrigation ami weather conditions may boar some relation 

 to the severe outbreak. This view is supported by the activity of the secondary 

 parasite Tuberculina, 



[Plant diseases in Ontario] {Ann. Hpt. Ontario Apr. Col. and E.rpt. Farm. .;.,' 

 (1917). pp. 20-31). — Portions of this report, which d^als also with other sub- 

 jects, give accounts of dusting for apple scab, which is not considered superior 

 to liquid spraying; control of brown rot on sweet cherries by means of a com- 

 bination of dusting and liquid sprays; the fifth year's test of such pear blight 

 control measures, as prompt removal of blighted branches or blossoms and dis- 

 infection of tools or wounds made therewith; a new nozzle dispensing with a 

 tower for tall trees; and a successful search for a raspberry variety immune to 

 yellows. 



Prolonged wet weather in early summer favored the development and spread 

 of certain fungus diseases. Currant leaf spot was very severe in the Niagara 

 district. Apple scab was prevalent and severe in all orchards which had not 

 been thoroughly sprayed. Tomato blossom end rot was prevalent in parts of 

 the Province. The disease is considered as physiological. 



Potato late blight (Phytophthora infestans) appeared early in July, but was 

 checked by dry weather. A minor outbreak oecur»d in September. An Inspec- 

 tion revealed the presence of such physiological diseases as leaf roll, mosaic, 

 and curly dwarf in certain areas. 



