This historic book may have numerous typos and missing text.
Purchasers can download a free scanned copy of the original book
(without typos) from the publisher. Not indexed. Not illustrated.
1920 Excerpt: ...and sprays applied early in June have invariably
62859--1---bull. 712 2 resulted in injury. In some cases intense
burning sunlight has not occurred until fully two weeks after the
spraying was completed, but still severe burning of the fruit
resulted. The adoption of adequate spraying methods is largely
dependent on the safety with which they may be used. The data
secured on injury in connection with the use of various sprays
during the course of the experiments reported below will therefore
be of value in pointing out the weather conditions under which
burning occurs, the type of injury resulting, and the time at which
the sprays may be safely applied. These data are presented in
connection with the experiments herein reported. ORCHARD SPRAYING
EXPERIMENTS.1 The orchards used were adjacent to each other and for
the purposes of this work can be considered as one. The trees used
were a solid block of the Pryor Red and Jonathan varieties, the
experimental plats each consisting of adjacent rows of seven trees
each, while the Black Ben Davis plats comprising a like number of
trees were located in double rows extending across the orchard. The
trees were 14 years old at the beginning of the experiments in
1915. The Pryor Red trees have a very open habit of growth, and
although they had been cut back severely to bring them into more
workable shape they still had a spread of about 30 feet and were
about 30 feet high. When in full foliage they required about 25
gallons of spray material per tree. The Black Ben Davis trees were
not spread out as much, but were more compact and dense. They
required about 20 gallons of spray material each. The Jonathan
trees were smaller than those of the Black Ben Davis and more open,
requiring about 10 to 15 gallons of spray mat...
|Country of origin:
United States Department of Agriculture
||246 x 189 x 21mm (L x W x T)
||Paperback - Trade
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