64 Nebraska Agricultural Exp. Station, Research Bui. 10 
observations on which this report is based. The fungus attacks 
the fruit late in the season and is entirely superficial, the loss 
being due to discoloration, reducing the salability of the fruit. 
The fungus is most abundant during wet seasons and does the 
most damage to fruit in the lower parts of the orchard where air 
drainage is poor or where the trees stand too close together or are 
not properly pruned. 
Fig. 14 — Sooty blotch or flyspeck on fruit 
Observations indicate that with proper pruning to admit air 
and light the disease will be incidentally controlled in spraying 
for blotch and scab. 
BORDEAUX VS. LIME SULPHUR 
Bordeaux has long been considered as the specific for all 
fungous diseases and has upheld its reputation in so far as con- 
trolling diseases is concerned. However, a great deal of injury 
to fruit and foliage often accompanies its use. In searching for 
a substitute, lime sulphur was found to be the most satisfactory 
material as a fungicide. Its fungicidal properties may not be i 
quite so pronounced as those of Bordeaux, but the small amount | 
of injury accompanying its judicial use, together with its insec- ( 
ticidal value, often makes it more desirable than Bordeaux. . 
Experiments were begun at this Station to determine the rela- | 
tive value of each for general spraying purposes. The three 
seasons during which the tests were carried on offer ample varia- 
tions in weather conditions to permit of rather general conclu- 
sions as to the value of each and the conditions which encourage 
injury from the use of either. 
