88 



corresponding to that of the Rose mildew. The mildews 

 of apple, chrysanthemums, peas, hops, strawberries, and 

 gooseberries are all common in this country. The 

 American Gooseberry mildew is the most destructive of 

 these, and growers of gooseberries have to observe certain 

 restrictions prescribed by the Government in regard to this 

 disease. Full particulars of the symptoms and treatment 

 may be obtained from the Board of Agriculture.* 



Preventive measures against most of these mildews are 

 similar. The main facts to consider are the means of 

 spreading during the season and the method of carrying 

 over from autumn to spring. Sulphur, or one of its com- 

 pounds, is the most effective fungicide for use in combat- 

 ting mildews. Plants may be dusted with flowers of 

 sulphur or sprayed with liver of sulphur. Sprays, con- 

 taining lime and sulphur, are now 'extensively used with 

 success, especially in America, against the mildews of 

 hops and gooseberries. t The treatment with sulphur, or 

 its compounds, however, is only effective against the 

 summer stage of the fungus and other measures must be 

 taken to destroy the resting fungus. The only satis- 

 factory method of dealing with this is by the removal 

 and immediate destruction of all branches and leaves 

 bearing perithecia. Otherwise no amount of spraying will 

 prevent the disease recurring year after year. 



* Leaflet No. 105. 



t Eyre and Salmon have recently recommended the use of 

 ammonium sulphide against American Gooseberry Mildew. 

 "Journal Board Agric.," Feb., 1916. 



