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Wisconsin State Cranberry Growers Association / Wisconsin State Cranberry Growers' Association. Forty-fifth annual meeting, Wisconsin Rapids, Wis., December 2, 1931. Forty-fifth summer convention, Wisconsin Rapids, Wis., August 18, 1931
(1931)

Chambers, E. L.
Little things,   pp. 30-33 PDF (1.1 MB)


Page 31


WISCONSIN CRANBERRY GROWERS' ASSOCIATION 31
introduction of citrous nursery stock or any other possible carrier
which might bring more of these troubles into their section of the
country. Our New England neighbors have already been sold on the
necessity of curtailing wholesale shipments from foreign countries, of
plants or other materials capable of carrying new pests, after their
experiences with the Gypsy and Brown Tail Moths, the Japanese
Beetle, Oriental Fruit Worm, European Corn Borer, White Pine Blist-
er Rust, Chestnut Blight,. Potato Wart, etc. Here in Wisconsin we
have been very fortunate in not having to deal with many of these
pests as yet, although a number of them are almost at our very
door, and the white pine blister rust has been making its home with us
for nearly fourteen years and the European corn borer, you will re-
member, came in last summer. Two separate infestations of the corn
borer were discovered the latter part of August by our scouting crews
working in cooperation with the Federal government along the shore
of Lake Michigan in Sheboygan and Manitowoc counties respectively.
While only eighteen specimens were found in these fields, it is rea-
sonable to expect that others are present that were not discovered.
Every effort is being made with the limited funds available to see
that e"ery possible hibernating quarter visible will be destroyed be-
fore the overwintering larva can transform into a moth next June.
While we have never felt that the corn borer would be the problem
here in a state like ours with 115,000 silos and most of the corn go-
ing into these, we will, of course, have serious losses to the score or
more of large sweet corn canning areas, should this pest be allowed to
become established. Corn that has been reduced to a shell in the field
by the tunneling of these larvae of course has no food value in the
silo, and it will be necessary to employ very careful clean plowing to
keep the infestation reduced to a point where it will not do serious
economic damage; and then learn to live with this pest as we have
the Colorado Potato Beetle and other pests.
The white pine blister rust is a disease which some of our cran-
berry growers will have to reckon with in their plans to protect their
watersheds by reforestation if white pine is to be grown. White pine
is a very desirable species for reforestation and the majority of the
trees now being distributed from our state nursery are of this species.
The control of this disease is a simple one, however, as compared with
most pests and consists in removing the wild currant and gooseberry
bushes growing within 900 feet of the pine to be protected. The
fungous causing blister rust must spend a portion of its life cycle on
the currant and gooseberry bushes before it can again infect another
pine.
While it is a slow process figuring out how these various maladies
do their damage, careful investigation over a period of years usually
finds the weakest point in the enemy's attack and permits the solving
of the problem. Probably one of the most outstanding achievements
along this line have been with human diseases such as malaria, yellow
fever and typhoid, the discoveries which made possible the building
of the Panama Canal which had been given up in despair several


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