G89 



The sprayed area yielded 200 bushels ol" sonud potatoes per acre, while 

 the iiiisprayed yielded only !'-<; bushels. 



Treatment of bitter rot of the apple (pp. 78, 70), — A brief account 

 of an experiment in an orchard at Smyrna, Delaware, in which one 

 apple tree was sprayed with sulphide of potassium, and another with 

 commercial carbonate of copper. The former fungicide was partly 

 effective, but the latter seemed to have no effect. The disease had 

 progi-essed too far before the hrst application to make the experiment 

 a fair test. 



Leaf spot ofalfaJfa (pp. 70-84). — An illustrated description of i*6e»^?o- 

 pezizd medicaginis, and a brief account of an experiment in wlucli soil 

 from a field where diseased alfalfa was growing was sterilized by heat- 

 ing and planted witli alfalfa seed, some of which had been soaked in a 

 solution of copper sulphate. The results were negative. 



Rot of scarlet clover (pp. 84-80). — An illustrated description of Sclero- 

 tinia irifolium observed on a plat of scarlet clover at the station. 



^eah of wheat ([)p. 80, 00). — A biiefilhistrated description iA' Fusariurit 

 culmorum. 



Blacl: rot of sweet potatoes (pp. 00, 01). — Sweet potato plants were 

 grown in fonr boxes containing soil from a propagating bed in which 

 the black rot {Cerastoci/stis tiinbriata) had been previously developed. 

 The soil in two boxes was sterilized by heating. Tbe tnbers grown in 

 the unsterilizcd soil were healthy. In another experiment diseased and 

 healthy tubers were xdantcd in separate boxes containing sterilized soil. 

 Fifty per cent of the tubers grown from diseased seed were diseased, 

 while those grown from healthy seed were all healthy. 



Eeport of Horticultukist, M. H. Beckwitii (pp. 02-100), — This 

 includes a list of the fruits planted in 1800, and accounts of tests of 

 varieties of strawberries and potatoes. 



Fruits planted (pp. 03-100). — A list of 70 varieties of peaches planted 

 for experimental purposes in the orchard of S. H. Messick, near Bridge- 

 ville, Delaware; 104: varieties of peaches planted in the orchard of C 

 Wright, near Seaford, Delaware; 37 varieties of peaches planted at the 

 station; and 01 varieties of strawberries, 5 of currants, and 5 of goose- 

 berries planted at the station. 



Strawberries, test of varieties (pp, 100-lOG), — Tabulated data for 22 

 varieties tested at j!!<^ewark, Bridgeville, and Mernmid, Bubach, Gandy, 

 and Pearl were among the most promising varieties, 



Fotatoes, test of varieties (i)p. 100-100). — Tabulated data for 52 varie- 

 ties tested at the station and 8 at Dover, Delaware. At the station the 

 most i)roductive varieties were Crimson Beauty, Delaware, McClelland, 

 Great Eastern, Invincible, and Sunmiit. At Dover, Gandy was suj)e- 

 rior in yield and quality. The varieties free from rot were Early Maine, 

 Early Ohio, Early Puritan, Lee Favorite, Minister, and Kough Dia- 

 moiul. Among those seriously injured by rot were Crimson Beauty, 

 Gandy, Invincible, and Summit. 

 21820— Xo, 10 3 



