plats of wheat at the Ohio Agricultural Experiment Station were 

 severely attacked by both Hessian lly and red rust, so much so that the 

 station ])otanist called attention to the occurrence of rust in the wheat 

 fields in the agricultural press. Plats sown before September 25 were 

 all seriously affected by the rust, that sown on the 21st being nmch 

 more seriously injured than the other plats, for the reason that, with 

 the others, it was attacked by the fly, but the rust coming at the 

 critical period of its growth prevented the plants from sending out 

 tillers, and the damage begun by the fly was thus rendered disastrous 

 by the rust. The present year, in southern Illinois, I also witnessed 

 again something of the same sort, with this variation, however: Where 

 the wheat had been sown on wheat-stubble lands, and sown early, the 

 young plants had been attacked by the tly, and later the damage had 

 been accentuated by the rust: and, singularly enough, the exact loca- 

 tion of the shocks of the harvested grain of the previous crop could 

 be clearly observed by the much more reddish appearance of the young 

 growing grain, a fact that could be observed at a considerable distance 

 away. In fact, a circular space the area of the old grain shock was 

 fairly browning under the effect of the rust, which lessened in inten- 

 sity from this area outward. These brown-yellow spots could be seen 

 regularly in rows across the field as the grain had been shocked at 

 harvest. 



MOSaUITOCIDES. 



By J. B. Smith, Netv Brunsnnck, N. J. 



It is not always possible at once or entirely to abolish breeding 

 places for mosquitoes and it is highly desirable that we should have at 

 command some material or class of materials that will kill larvse or 

 for a time make pools uninhalntable for them. There is a popular 

 belief in the effectiveness of certain substances without any real basis, 

 and "mosquitocides" in varying forms testif}^ to the interest which 

 dealers in patent nostrums are quick to discern in the public. 



The most readily available of all the materials that have been used 

 is petroleum, crude or partly or wholly refined. Sprayed over the 

 surface of a pool, it forms a film that covers it completely and kills in 

 a short time the larvte or pup{\3 that are compelled to try for air 

 through it. In the grade known as fuel oil, it forms a very good 

 practical material where its odor or its general unpleasant mussiness 

 are not objectionable. For sewer or catch basins it is probably as 

 good a thing as can be used, and on quiet waters in confined areas 

 where a thin film can be maintained, its odor will scarcely be offen- 

 sive. On larger pools, open to the winds or interrupted by grassy or 

 other vegetation a great deal of oil must be used, or an unbroken film, 

 even if secured, will not last long enough to kill more than a small 



