498 EXPERIMENT STATION RECORD. 



treating wheat witli carbon bisulphid before planting was tested and 

 tlie germination in 2 lots of 1,000 seed each was not influenced to any 

 practical extent. 



Strawberry plants were subjected to the fumes for 1 hour before 

 planting and they suffered considerable injury. Plants may be treated 

 while growing without injury. 



Experiments to destroy horse nettle, M. H. Beokwith {Dela- 

 ware iSta. Bpt. 1S95, pp. 153, 15-1). — Experiments were conducted to 

 destroy Solannm caroUnense, locally known as Sodom apple, sulphuric 

 acid and kerosene being employed. The results showed that they were 

 efficient only so far as they penetrated the roots, which was but a few 

 inches, the i^lants readily sprouting from below. Only frequent culture 

 and digging out the roots proved certain means of eradication. 



A ne-w germinating apparatus, H. F. Jonkman (Bot. Ceniil., 6S {1S9G), Xo. 8, pp. 

 254-256, fig. 1). 



Weeds in our fields, W. M. Hays {Minnesota Sta. Bpt. 1S95, pp. 373-383, jj?8. 2).— 

 Eepriuted from Bulletin 46 of the station (E. S. R.. 8, p. 234). 



DISEASES OF PLANTS. 



Ammoniacal solutions of copper carbonate, C. L. Penny [Dela- 



tcare Sta. Rpt. 1S95, pp. 206, 207). — The author calls attention to the 

 economy of using dilute solutions of ammonia in the preparation of 

 ammoniacal copper carbonate solutions. Dilute ammonia will dissolve 

 more copper carbonate than the stronger solutions. In general prac- 

 tice in preparing this fungicide the author recommends diluting the 

 ammonia nine-fold before applying it to the copper carbonate, this solu- 

 tion to be still further diluted one hundredfold before using. 



Rust in wheat conference, D. McAlpine and W. Lowrie {Agl. 

 Gaz. N. iS. Wales, 7 {1890), No. 7, pp. 438-443).— A.t the meeting of this 

 conference held in Melbourne in May, 189G, the committee made a final 

 report in which the general work attempted was outlined. The oppo- 

 sition of the millers to rust-resistant wheats is shown to be inapplicable 

 to the recommendations of the conference since the varieties suggested 

 as resistant are not to be classified with the maccaroni wheats, but are 

 of the same grade as the best Minnesota and Hungarian varieties of 

 bread wheats. 



The work of the nomenclature committee in determining and classi- 

 fying varieties of wheat into rust resistant, rust escaping, and rust 

 liable is commended, and it is recommended that it be continued. 



Although no effective means can be advanced for preventing rust in 

 wheat, yet the risk from loss may be lessened by following as far as 

 l)ossible these suggestions : 



Early ripening varieties should be cultivated. Where late varieties 

 are used early sowing should be adopted, and the grain should be 



