Spraying Experiments in Nebraska 
75 
occurs except at the margin of the injured spot. On the sprayed 
fruit a much larger area is usually affected. Cracking is more 
pronounced and scales and rays of russet extend far beyond the 
limits of the sunken corky spots. 
Often the most severe injury did not appear for several days 
after spraying, or until a period of very hot, dry weather and 
bright sunshine. However, in such cases the injury was rarely 
so severe as when the spraying was done during a period of ex- 
tremely hot, dry weather. Bonns (1912) says that the spray 
affects only that portion of the fruit which has already been 
injured by sun scald. 
Fig. 17 — Lime sulphur injury on fruit 
On the foliage, lime sulphur injury appears within the first 12 
to 24 hours after applying the spray. The tender new leaves are 
the first to suffer but in more severe cases the mature leaves are 
also damaged. The injury appears first at the tips and edges, 
where the material collects in larger quantities, and gradually ex- 
tends toward the center of the leaf. Dead, brown spots may 
also appear over the entire leaf. The general appearance is as 
tho the leaves had been scorched by fire. 
Lime sulphur containing sludge causes more severe burning 
than where the clear liquid is used. This was demonstrated in a 
near-by orchard where lime sulphur containing sludge was used on 
a part of the orchard while the remainder was sprayed with the 
clear liquid. Both leaves and fruit were damaged where the 
sludge was used. 
(1912) Bonns, W. W. Orchard spraying experiments. Maine Sta. Bui. 198:21. 
