294 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 9 



difference but may prove to be of interest. Further studies are to 

 be made along this Hne. The analyses gave the following data : 



Variety Per cent Ash in Per cent Ash 



Young Plants in Straw 



Fultz 15.146 5.147 



Fulcaster 15 .379 4 .598 



Check 14.796 4.751 



The extent of infestation in the three varieties seems to vary di- 

 rectly with the ash content. 



Yield. — Our records on yield for the first year's work are unsatis- 

 factory though they give some light on the comparative yields of the 

 three varieties under investigation. A plague of English sparrows 

 interfered with the data on total yields. Representative heads were 

 collected on June 26 and weighed. 



Variety No. of Heads Weight Weight per 



100 Heads 



Fulcaster 371 334 grams 90.03 grams 



Fultz 439 324 grams 73 .80 grams 



Check 367 273 grams 74 .38 grams 



Fulcaster far outweighed both the other varieties. It is a bearded 

 variety, however, which perhaps accounts for part of the extra weight. 

 These heads were not threshed since the main crop was lost. 



Physiological Studies of Plants. — In connection with inves- 

 tigations by the Department of Botany on the smuts and rusts of 

 wheat, observations are being made with a view of detecting any struc- 

 tural difference in the plant of the standard varieties of wheat. These 

 data will also be of value in connection with this work and will be 

 available later. 



Plans for Second Year's Work. — This work is being continued 

 and this year the following varieties are being used on a larger scale: 

 Harvest King, Beechwood Hybrid, Check mixed, Mediterranean, 

 Deitz, Turkey, Check pure, Fulcaster, Fultz, Michigan Amber and Pool. 

 Sowings have been made early and late to determine what effect it 

 has on the fly and on the wheat itself as regards winter injury. The 

 investigation this j^ear will also include data on these varieties in 

 the experimental fields of the Department of Farm Crops both here 

 at Columbia and at the substations over the state. This it is hoped 

 will enable us to present more really valuable data on this subject 

 another year. 



Conclusion. — From the first year the only important conclusion 

 that has been reached, is that some varieties of wheat are more severely 

 attacked by the fly than others. The data at hand is insufficient for 

 definite conclusions regarding the other subjects under investigation. 



