EXPERIMENT STATION REPORTS. 199 



Grape and potato dusting. — Copper sulphate dust used on them but no 

 definite results obtained because of lack of any injury on checks controllable 

 by materials used. Grape foliage dusted was in much better condition than 

 where sprayed. The sprayed foliage showed considerable spray injury which 

 probably developed in connection wdth the leaf hopper injur5^ 



The experimental work of R. E. Marshall is along the lines of plum and 

 apple pollination studies, fertihzer experiments with small fruits and pruning 

 experiments with tree fruits. This work has just been started the present 

 season so that there is nothing in this line to report upon at the present time. 



Excessive demand for grape plants the past two seasons has lead to a 

 demand for investigations of the best methods of propagating grapes from 

 hardwood cuttings. During the past winter Mr. Stanley Johnston did 

 considerable work along this line testing out different methods of storing and 

 handling grape cuttings to induce efficient callousing. A detailed report of 

 this will be made before next spring to prevent the severe losses that have 

 been experienced the past season by the growers in trying to root these cut- 

 tings. 



Tests were made under the direction of Mr. H. C. Moore of different varie- 

 ties and strains of canning peas, especially in reference to their resistance to 

 root rot and production. 



In cooperation with Mr. C. W. Waid of the Extension division, variety 

 tests and tests of selected strains of potatoes were conducted as in previous 

 years; also a number of fertilizer tests with different forms of fertilizers and 

 with different distances of planting, but due to the exceedingly dry weather 

 the results of these tests in several parts of the State were not conclusive. 



The work on bud selection and performance record work with Baldwin 

 apples as previously reported was continued and the work will probably be 

 concluded this year. The bud selection work in the duchess orchard on the 

 Wilson farm at Benton Harbor, Michigan, was concluded at the end of the 

 season. With these records at hand a study was made in the orchard as to 

 the condition of the trees to see if the differences in the productional records 

 of these trees could be ascribed to any condition of the environment or to any 

 physiological condition of the tree itself. A careful study of the trees in 

 this manner showed that in each case the differences in production could be 

 ascribed to poor drainage, root gall, girdling or to some physiological condi- 

 tion influencing production rather than to an inherent character of the tree. 



During the fall Mr. Dutton made studies of grape vines endeavoring to 

 obtain vines producing a larger and better fruit and being expecially produc- 

 tive and vigorous. Such vines as seemed promising were staked in various 

 vineyards in Van Buren county and records will be taken upon them the com- 

 ing fall. 



Respectfully submitted, 



C. P. HALLIGAN, 



Horticulturist. 

 East Lansing, Michigan, June 30, 1921. 



REPORT OF THE GRAHAM HORTICULTURAL EXPERIMENT STATION. 



To Director R. S. Shaw: 



Dear Sir: 



It is a pleasure to report the development that has taken place on the 

 Graham Horticultural Station grounds during the past year. Since the last 

 report the old farm house that was on the property when purchased has been 



