678 REPORT OF THE HORTICULTURIST OF THE 
From this table it appears that the Russian apples and the 
crab apples, as represented by the varieties quoted in the above 
lists, are generally more susceptible to injury from spray in an 
unfavorable season in this climate than are the other apples cul- 
tivated in this section of the country. In the classes which were 
injured very badly there are 47.60 per cent. of the crab apples, 
22.60 per cent. of the Russian apples and but 3.80 per cent. of 
other apples, while in the classes which were injured very slightly 
or not at all, there are none of the crab apples, 6.50 per cent. of the 
Russian apples and 16.1 per cent. of other apples. 
Notwithstanding this apparent general susceptibility of the 
Russian apples to injury from spraying in an unfavorable season, 
it should be remembered that some of the most desirable of them 
such as Alexander, Oldenburg, Red Astrachan, Tetovsky and 
Titovka were injured slightly or not at all by the spray. The 
susceptibility to injury from spraying does not appear to corre- 
spond with the susceptibility of a variety to attacks of the scab 
fungus, Husicladium,; for example, Early Harvest and Fall Pip- 
pin are particularly subject to the scab, while they were injured 
very slightly or not at all by the spray. . 
The susceptibility of a variety to injury from the spray in 
unfavorable seasons vught to be considered in selecting varieties 
for planting in commercial orchards, for although they may show ~ 
general immunity from attacks of scab and therefore may not 
need treatment with Bordeaux mixture, they can hardly escape 
the attacks of the codlin moth and other injurious insects, so that 
they will probably need to be sprayed with London purple or 
Paris green. Spraying with these substances is liable to injure 
the foliage and fruit of some varieties in an unfavorable season 
the same as does the Bordeaux mixture, as has been explained on 
a preceding page. 
INFLUENCE oF SPRAYING oN Next SEaAson’s Orop. — 
In order to gain some data on the third question proposed for 
investigation at the beginning of this article, namely, “To what 
extent will the benefits of spraying one season influence the crop 
of the next season?” Seventeen trees were selected for treat- 
ment, eight of which had been sprayed the previous season and 
re : 
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