150 PATHOLOGY [Box. Absts., Vol. IX, 



The fungus spores attack the trees where the bark is cracked and where gum often exudes 

 from -wounds. Probably the best way to prevent attack is to apply pine tar to every crack 

 or abrasion of the bark. It is also suggested that an antiseptic resin, such as a combination 

 of formaldehj^de with a resinous base, might be devised as a more sightly remedy. — E. N . 

 Gather coal. 



957. Mackie, W. W., and F. N. Briggs. Fungicidal dusts for control of smuts. Science 

 52: 540. 1920. — It has been demonstrated recently that the commonly accepted standard 

 smut treatments with either copper sulphate or formaldehyde are frequently injurious, 

 either producing poor germination or weakening the seedling. Formaldehyde injury seems 

 more severe with wheat when plantings are made in dry soil. Injury from copper sulphate 

 treatments are greater with wheat mechanically injured, as in the threshing process. As an 

 improved method, dust applications of copper sulphate are recommended. Little Club 

 wheat was dusted with spores of Tilletia tritici at the rate of 1 part smut spores to 750 parts 

 of seed by weight, and treated by standard formulas as well as by the dust method. Dehy- 

 drated copper sulphate mixed with equal parts of calcium hydrate, at the rate of 2 ounces 

 per bushel, controlled smut without injury to germination. — A. H. Chivers. 



958. Owens, C. E. Gooseberry mildew control. Oregon Agric. Exp. Sta. Crop Pest 

 and Hort. Rept. 3: 152-155. Fig. 39-41. 1921. — Complete control may be obtained by 3 

 applications of lime-sulphur spray. The 1st of these at a dilution of 1-25, put on when the 

 leaves are emerging from the buds, is most important; the 2nd (1-45) should be put on just 

 before blooming, the 3rd (1-50) just after blooming. — E. J. Kraus. 



959. ScoFiELD, C. S. Cotton root rot in the San Antonio rotations. Jour. Agric. Res. 

 2P: 117-125. 1921. — Records are presented covering 8 years on the occurrence of root rot 

 of cotton [caused by Phymatochitrium omnivorum] in experimental plots in Texas involving 

 continuous cropping and rotations with various crops of 2, 3, and 4 years respectively. The 

 data indicate that "the control of root rot is not to be found through any ordinary system 

 of crop rotation or of tillage methods." — D. Reddick. 



960. Snapp, Oliver I., and Leslie Pierce. Experiments in dusting and spraying peaches 

 for the control of curculio, brown rot, and scab. Mississippi Agric. Exp. Sta. Bull. 195. 8p., 

 1 fig. 1920. — Liquid sprays gave slightly better results than dust but required more labor 

 in applying. Dust (lead arsenate 10 per cent, lime 10 per cent, and sulphur 80 per cent) 

 applied on April 22, May 11, and June 12 controlled brown rot and scab eiTectively but did 

 not control the curculio, as 19.8 per cent of the fruit produced was wormy. — H. B. Brown. 



961. ZuNDEL, George L. Preliminary experiments on injury to wheat from seed treatment 

 in "Washington. [Abstract.] Phytopathology 11: 103. 1921. — Both copper sulphate solution 

 (l pound to 5 gallons) and formaldehyde solution (1 to 40) injured seed wheat. The injury 

 was greatly reduced when such treatment was followed by dipping the seed 3-5 minutes in 

 lime solution. — B. B. Higgins. 



MISCELLANEOUS (TECHNIQUE, COGNATE RESEARCHES) 



962. G., C. G. [Rev. of: Chittenden, F. J. The garden doctor: plants in health and 

 disease, x + 154 p. Country Life: London; Chas. Scribner's Sons: New York, 1920.] 

 Nature 107: 40. 1921. 



963. Hesler, L. R. [Rev. of: Smith, Erwin F. An introduction to bacterial diseases 

 of plants. XXX + 688 p., 453 fig. W. B. Saunders Co.: Philadelphia and London, 1920.] 

 Phytopathology 11: 107-108. 1921. 



964. Orton, C. R. Lightning injury to potato and cabbage. Phytopathology 11: 96-98. 

 Fig. 1. 1921. 



