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46 Tltirty-F0zm·th. Aimual Report
Potato Variety and Strain Tests. The Triumph variety T 1
showed special merit in being much earlier than Cobbler or 1050
_ Early Ohio and gave a fair yield. The Cobbler, considered iff?]
° from the standpoint of yield, surpassed all other varieties for Viola
1 both early and second crops. The Early Petoskey has appeared mlm
i on our grounds so much like Irish Cobbler as to raise the ques- Off
i tion whether it is not identical with that variety. The Green €Vld`
Mountain variety gave the best showing among the late varie- port
  ties, closely followed by Rural Russet. Of 2
l All the certified strains received from other states except year
i one, proved to be productive and investigation shows that this
one came from an unreliable grower. Certain strains of Ken- §`€H1‘
tucky-grown Cobblcr stock selected for several years gave Gl11cl·
yields practically equal to those of the best· certified strains ill fu
obtained elsewhere. This indicates that high-yielding strains Colle
of seed potatoes can be maintained by Kentucky growers pro- 11'€1‘G
vided proper methods of selection are practist. Apparently Stall
the weather conditions in the fall in Kentucky are as favorable 155110
to the production of seed potatoes as are the conditions found UW l
' in the potato growing districts of the north. p
Keeping Qualities of Sweet Potatoes. A minor study was grea
_ made upon the keeping qualities of sweet potatoes under >.\strai
1 various conditions. YVhen the vines were cut away before Bow
2 frost, only 4 per cent of the potatoes spoiled, after storage at of W
> about 60 to S5 degrees F. Vilhen the vines were cut immediate- With
  ly after a freeze, no loss occurred. \Vhen the vines were cut Wllof
1 tive days after the freeze, the loss was 88 per cent. Potatoes
. badly affected with soil stain (Nlonilochaetes irifuscans) but imp,
. otherwise sound, sustained a loss of 55 per cent, while healthy {mm
checks suffered a loss of l2 per cent. Potatoes wrapped with gate
paper sustained a loss of 20 per cent as against 12 per cent in
I those unwrapped. i with
The Locust Borer. A second contribution to the life-his-   essit
tory and habits of the locust borer (Cyllene robiniac) was thc  
published during the year as Station bulletin 23l, being de- their
voted largely to a consideration of the relation of the insect in lg
‘ to its food plants.
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