-22- 
PLANT-DISEASE CONTROL— Continued 
(233) Prout, C.,* and Ritter, L. B. 
White Pine in Minnesota. Conserv. Volunteer 10 (56): 37-41. 
January-February. 
(234) Putnam, H. N. 
White Pine Blister Rust Spreads Southward in Indiana and Ohio. 
Forestry Mews 2 (8): 16. August. 
(235) Quick, C. R. 
Germination of Phacelia Seeds. Madrono 9 (1): 17-20. January. 
(236) Riker, A. J., Kouba, T. F., and Henry, B. W. 
The Influence of Temperature and Humidity on the Development 
of White Pine Blister Rust on Ribes Leaves. (Note) 
Phytopathology 37 (1): 19« January. 
(237) Sisson, M. A. 
Preseat Status of the Peach Mosaic Control Program in Western 
Colorado. West. Colo. Hort. Soc. Trans, 4» 155-161. 
January. 
(238) Tost, H. E., and Hepting, G. H.* 
The Development of White Pine Blister Rust in an Unprotected 
Area in North Carolina. Plant Disease Rptr. 31 (1)* 26. 
January. 2? rocesse 4i7 
PLANT QUARANTINES 
(239) Becker, G. C. 
Importing Cotton Waste Samples. Waste Trade Jour., Internatl. 
Ed. 1947. 
(240) Cooley, C. E. 
International Air Commerce and Plant Quarantines. Jour. Econ. 
Ent. 40 (1): 129-132. February. 
STORED-PRODUCTS PESTS 
(241) Cotton, R. T. 
Pests in Stored Products. U. S. Dept. Agr. Yearbook (Science 
in Farming) 1943-1947: 874-878. 
(2^2) __ and Frankenfeld, J. C. 
Dusts for Use Against Stored Grain Insects. Down to 
Earth ^Dow Chemical Co^/ 3 (l): 9-11. Summer issue. 
(243) and Walkden, H. H. 
Fumigation of Grains and Other Stored Foods. Part II. Agr. 
Chem. 2 (l): 33-35. May. 
