Agricultural Chemistry. 47 



rose foliage was almost completely protected from the attacks of the 

 beetles by only one very thorough application of the poison, which 

 was used at the rate of 12 pounds in 50 gallons of water. An exten- 

 sive rose-grower on Long Island, who sprayed twice with the poison 

 at the rate of 10 pounds in 50 gallons of water reports that " The bugs 

 distinctly avoided the sprayed beds and rows. If caught and placed 

 on the sprayed parts, they would become sluggish in their move- 

 ments, and paralyzed in their limbs, and many of them would die." 



Work was continued on the life-history of the rose-chafer and a 

 bulletin is in preparation giving the results of our studies on this 

 insect, and of the co-operative experiments with a poison spray to 

 control it. In this bulletin we also expect to include the results of 

 the co-operative work against the plum and quince ciu"culios. 



I visited several of the orchardists who carried on co-operative 

 experiments, both before spraying time and afterwards, to note the 

 results. In these visitations among the farmers, I learn much that 

 is helpful to me in a practical way, and often I am able to give direct 

 information that is of much benefit to them. 



During a recent tour through many of the best fruit orchards in the 

 western part of the state, I discovered that the dreaded San Jose scale 

 was thoroughly established in several orchards where the owner 

 hardly suspected its presence. This serious orchard pest is now 

 widely scattered all through the state, and is cropping out in new 

 localities at frequent intervals. Evidently all our orchardists must 

 sooner or later face the problem of controlling this dangerous enemy. 

 I am just starting a series of experiments with the new soluble 

 petroleums against this scale insect. These preparations make staple 

 emulsions by simply diluting with water. Some preliminary experi- 

 ments give very promising results. 



M. V. SLTNGERLAND, 

 Assistant Professor of Entomology. 



V. AGRICULTURAL CHEMISTRY. 



1. FEDERAL EXPERIMENT STATION WORK. 



In continuation of the experiments of the previous year, 59 sam- 

 ples of sweet corn have been examined for the sugar content. The 

 results of the first year's work indicate that the sugar content may be 

 increased, by proper selection of seed, as individual ears showed 

 sugar contents ranging from 3.47 per cent, to 6.28 per cent, (dry 

 basis). The work will be continued. 



