REPORT OF THE HORTICULTURIST. 



TREATMENT FOR GOOSEBERRY MILDEW.* 



C. P. Close. 



SUMMAEY. 



For three seasons, Bordeaux mixture, Ijsol and formalin Have 

 been compared \vitli potassium sulphide, the latter giving the best 

 results in all three series. 



The Bordeaux mixture proved comparatively valueless, as in 

 but one series of tests did treated bushes show less mildew than 

 check bushes; formalin in the strongest solution, 1 oz. to 1 gal. 

 water, gave fair results, but weaker solutions ranked with the 

 Bordeaux mixture; lysol gave promising results, coming next to 

 the potassium sulphide in reduction of mildew injury. 



With one exception, Bordeaux mixture, very early spraying 

 gave better results than medium early or late treatments. 



"Winter treatment was tested during one season, but did not 

 give sufficiently favorable results to justify recommendation. 



INTRODUCTION. 



The gooseberry mildew generally makes its appearance during 

 the last half of May or first half of June. It is first noticed as 

 glistening, frost-like spots on the fruit on the lower part of the 

 bush where there is usually dense shade. As the disease progresses 

 the spots enlarge, turn dark brown and form a felt like covering 

 over a part, or all, of the berry. In a slight attack the disease 



Reprint of Bulletin No. 161. 



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