XVll 



MINISTRY OF AGEICULTUEE AND FISHERIES. 



ORMSKIRK POTATO TRIALS. 



ANNUAL REPORT FOR 1919 OF THE TRIALS 

 OP VARIETIES OP POTATOES IMMUNE 

 FROM WART DISEASE. 



SUMMARY OF CONTENTS. 



SeCTIOX I. IXTRODUCTIOX ... ... ... ... 



Weather; Manures; Planting; Condition of Seed 

 Section II. Miscellaneous Notes 



(a) Purity of Stocks... 



(b) Incidence and Intensity of AVart Disease in 1919 



(c) Degrees of Susceptibility 



(d) The Question of Types ... 



(e) List of Commercial Types and their Varieties ... 



(f) Soil Fungicides ... 



(g) Steam Sterilization 



(h) Report on Cooking Qualities 



Section ill. Reports on Ormskirk Trials, 1919 ... 



(a) Report on Small Stocks of Seedlings (Table I) 



(b) „ Immune Varieties previously tested (Table II) 



(c) Varieties tested in 1919 and showing no trace of Wart 



Disease (Table III) 



(d) „ Su.sceptible Varieties again tested in 1919 (Table IV) 



(e) „ Susceptible Varieties not previously tested (Table V) 

 (/) 3j »5 Varieties of Doubtful Immunity (Table YT) 



(g) „ „ Summary of Trials undertaken in 1919 



Section IV. Descriptive List of Certain Immune Varieties 



Section V. Complete List of Na:med Varieties Tested at Ormskirk 

 FROM 1915-1919 



(a) Immune A'arieties 



(b) Susceptible Varieties 



(e) Varieties of Doubtful Immunity ... 

 Section VI. Report on Local Immune Variety Trials in 1919... 



Copies of this publication may be obtained from tlie Offices of the 

 Ministry. 3, St. James's Square, London, S.W.I. Pj-ice "is, 6d. net,, 

 post free. 



