39 



in the country. A brief summary of the methods of application and 

 the results obtained at a number of stations are here given. 



Tobacco decoction was used with effect by the New Jersey Experi- 

 ment Station 1 against attacks of ilea beetles on potatoes, plant lice on 

 rose bushes and chrysanthemums, the wheat louse, the larva? of the rose 

 tortricid. and the rose slug, but its effects were not satisfactory when 

 used for the larva? of the elm leaf-beetle, hairy caterpillar, rose chafer, 

 and striped, beetle. Coarsely ground tobacco dust was ineffective 

 when applied on dry plants but had some effect on moist plants. 

 Finely ground tobacco dust was much more effective. The addition of 

 carbolic acid to tobacco powders increased their efficiency fully 50 per 

 cent. The author states that tobacco dust put into the soil was success- 

 fully used in 1890 by Dr. E. F. Smith as a remedy for the peach louse: 

 either tobacco decoction or tobacco dust was ineffectual as a remedy 

 for the rose chafer.- It was found that the horn fly 3 succumbed very 

 readily when brought into contact with tobacco powder. 



The Ohio Station found that dusting lettuce, roses, and other plants 

 grown in greenhouses with tobacco powder destroyed the plant lice 4 

 with which they were infested. 



At the Michigan Station 5 tobacco decoction was successfully used to 

 free currants, gooseberries, and apple trees from plant lice and cherry, 

 plum, and pear trees from slugs. It also proved effective against 

 striped flea beetles and cucumber flea beetles. 6 



Experiments conducted at the Missouri Experiment Station showed 

 that applications of tobacco dust were effective in preventing depre- 

 dations by the woolly aphis of the apple or apple-root plant louse. 7 



TOBACCO SOILS. 



A comparative study of tobacco soils is reported by the Pennsyl- 

 vania Station. The investigations were made in 1894 on Pennsylvania 

 soils from Donegal and Lititz. in Lancaster County, and Rocky Spring, 

 Franklin County, and also on soils from the best wrapper-leaf dis- 

 tricts of New England and North Carolina. The best tobacco soil 

 from Granville County. X. C. the soil of the "plains" land at East 

 Hartford. Conn., and the soil from Poquonock, Conn., were com- 

 posed chiefly of medium fine and very fine sand. Tobacco soil from 

 Granville County. X. C. and the soil from Podunk, Conn.. Hatfield, 

 Mass.. and Rocky Spring, Pa., consisted mainly of very line sand and 

 silt, the Rocky Spring soil being very largely composed of silt and the 

 others of fine sand: and the tobacco soils from Donegal and Lititz 



1 New Jersey Station Bui. No. 75. *Ohio Station Bui. No. 2, vol. 4. 

 2 Ibid. No. 82. "' Michigan Station Bui. No. IIS. 



3 New Jersey Station Rpt., 1889. 6 Michigan Stati< »n Bui. No. 58 and Kept., 1890. 

 : Missouri Station Bui. Xo. 35. 



