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Wisconsin State Horticultural Society / Annual report of the Wisconsin State Horticultural Society for the year 1910
Volume XL, Part II (1910)

Tuck, Mr.
Spraying. Arsenate of lead.,   pp. 137-140 PDF (888.2 KB)

Wallace, Erret
Lime sulphur as a summer spray,   pp. 140-149 PDF (2.9 MB)

Page 140

the evidence from the farm where he made his experiments, and
also codling moth.
The Secretary: Should we mix the arsenate with the milk
lime ?
Mr. Tuck: Yes.
The Secretary: Is it not sufficient to pour it into the Bor-
Mr. Tuck: You can put it into the Bordeaux afterwards,
only, if you put it into your lime before putting it into the Bor-
deaux mixture, your arsenate of lead will remain longer in sus-
pension.                                               I
A Member: Can you give us some recommendations in regard
to Bordeaui mixture ?
Mr. Tuck: For a 4-4-50 Bordeaux mixture, the first recom-
mendation I can give you is to slake the lime carefully, that is
an important point, do not brown your lime, get it carefully
slaked, then dilute it to 25 gallons, dissolve your blue stone and
dilute it to 25 gallons, then pour the two solutions together, pour
the solutions simultaneously together.
Mr. Bryant: May I say a word in regard to the application
of arsenate of lead for the plum curculio? Our Illinois ento-
mologist tells us that the plum curculio early in the season, be-
fore the apples are of any size, feeds upon the leaves, that the
effect of the application then is to poison them when they feed
upon the leaves, not by spraying the fruit.
Mr. Tuck: The first spray of arsenate of- lead is the most
effective spray, most important, just before the blossoms fall,
just before the cup of the calyx closes, to get some of the poison
into the cups of the calyx will do away with probably 95 per
cent of wormy fruit.
Before beginning my paper I would like to say a few words
concerning the reason why a certain Wealthy tree had been in-
jured by the Bordeaux mixture while the adjoining trees had not.
There are three or four principal factors that are likely to con-
trol Bordeaux injury either to fruit to foliage, one is weather

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