336 MANUAL OF FRUIT DISEASES 
under ordinary conditions. If spraying has been neglected in 
the past, then more than three applications will be necessary on 
account of the constant source of trouble on the twigs. A 
dormant spraying is advised for the far West. This is done 
late in the winter to kill the fungus on the twigs. A second 
dormant spraying is recommended in California, to be made 
just before the buds swell. Other applications follow: (1) a 
few days before the blossoms open; blossom-buds exposed and 
separated; (2) when the blossoms have for the most part 
fallen; (3) two weeks after the second application. In the 
East the two dormant sprayings advised for California condi- 
tions are not practiced for scab, although many pear orchards 
are sprayed just before the buds swell for blister-mite. The 
value of this application for scab needs investigation. Lime- 
sulfur 1-50, or bordeaux mixture 3-3-50, may be used; the 
latter is much less desirable on account of the russeting which 
it produces on the fruit. Since the fungus hibernates in the 
twigs and fallen leaves, it is advised that in pruning and culti- 
vation attention be given respectively to the removal of badly 
infected twigs and to the burial of old leaves.- 
REFERENCES 
Smith, R: E. Pear scab. California Agr. Exp. Sta. Bul. 163: 3-18. 
1905. 
Clinton, G. P. Report of the botanist. Pear. Scab. Connecticut 
Agr. Exp. Sta. Rept. 1904 : 323-324. 1905. 
Wallace, E. Lime-sulfur as a summer spray. Control of pear scab. 
Cornell Univ. Agr. Exp. Sta. Bul. 289: 160-162. 1911. 
Barrus, M.F. Diseases of pears. Pear scab. In The Fruit Industry 
in New York State. New York Agr. Dept. Bul. 79: 1048-1049. 
1916. 
Swingle, D. B. Fruit diseases in Montana. Pear scab. Montana 
Agr. Exp. Sta. Cire. 37: 318-319. 1914. 
Duggar, B. M. Some important pear diseases. III. Pear scab. 
Cornell Univ. Agr. Exp. Bul. 145: 616-620. 1898. 
Jackson, H. S. Diseases of pomaceous fruits. Pear diseases. Scab. 
Oregon Crop Pest and Hort. Bienn. rept. 1911-1912 : 246-247. 
