SMALL FRUITS 183 



Hume reports the Lady Thompson and Michel's Early 

 as quite resistant. 



Frequent change of beds; also cutting, gathering, and 

 burning or burying of tops in place after harvest lessens 

 this disease. The use of Bordeaux after the removal of 

 the diseased leaves will also lessen the infection of the 

 next year. 



Hume ' in Florida found that three early sprayings of 

 4-4-40 Bordeaux mixture checked the disease completely, 

 so that " it was a difficult matter to find a leaf at all dis- 

 eased in the whole patch." Later, when the disease began 

 to make headway again, another spraying stopped it. 



Leaf blight, aposphaeriose {Aposphceria sp.). — This dis- 

 ease was first found by Stevens ^ in 1892 in New York and 

 in New Jersey,^ and it is probably of wide distribution. 

 It is in some instances very destructive, causing loss of more 

 than half the crop. It may be distinguished from the other, 

 leaf diseases by the shape of its spot, which usually begins 

 at the leaf margin and extends toward the center, forming 

 a more or less V-shaped region. The spots are brown,. 



The treatment should be the same as that for Sphaerellose. 



Leaf spot, ascochytose (Ascochyta fragarioe Sacc). — This 

 leaf spot is very similar to sphaerellose, for which it may be 

 mistaken without microscopic diagnosis. The treatment 

 for the two is the same. 



Powdery mildew, sphaerothecose (Sphoerotheca humuli 

 (DC.) Burr.). — This mildew may be recognized by the 

 characters usually pertaining to the powdery mildews. 

 (See grape.) 



' Hume, N. H., Fla. Agr. Exp. Sta. Rpt. 1901, p. 95. 

 2 Halsted, B. D., N. J. Agr. Exp. Sta. Rpt. 1893, p. 329. 



