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Wisconsin State Cranberry Growers Association / Wisconsin State Cranberry Growers' Association. Forty-seventh annual meeting, Wisconsin Rapids, Wisconsin, December 14, 1933. Forty-seventh summer convention, Wisconsin Rapids, Wisconsin, August 8, 1933
(1933)

Bain, Henry F.
Cross pollinating the cranberry,   pp. 7-11 PDF (1.4 MB)


Page 7


WISCONSIN CRANBERRY GROWERS' ASSOCIATION
lieve, as one of the only commodities that didn't show red ink to the
dealers. It might have to some of the retailers, because in many in-
stances cranberries retailed at what we were getting for them. It is
my impression that if things keep on as they are going, and we don't
have a complete crop failure, we might look for a reasonably good
season, with a crop that may possibly be slightly larger than last
year's crop. I would like to have two or three years of last year's
quality, as I said in the January meeting. I don't believe we ever had
better all around quality in all three states than we had last year.
CROSS POLLINATING THE CRANBERRY
HnNRY F. BAIN
Among the early studies on cranberry false blossom, extensive sur-
veys were made to find whether all varieties were equally susceptible
to the disease. It soon became evident that the McFarlin was rarely
if ever infected badly enough to interfere with production, while the
Early Black usually showed greater freedom from infection than most
other varieties. Following these observations there was a period
when we hoped it might be possible to discover, among wild vines that
had grown in competition with the disease for an unknown length of
time in the past, some vine that would prove to be wholly immune. A
considerable number of single vine selections have been made in Wis-
consin and elsewhere with this purpose in view. The results so far
have been discouraging.
R. B. Wilcox has shown,' that the apparent resistance of the Mc-
Farlin and Early Black varieties is due to the feeding preferences of
the leafhopper which carries the disease. His experiments suggested
that the McFarlin would contract false blossom if infective hoppers
were compelled to feed on it. That this is the case has been definitely
proven by inoculating single McFarlin uprights in August, after the
fruit was advanced far enough to be certain of the identity of the
particular vines used.' Such inoculations, made at the time fruit bud
formation was beginning, produced typical false blossom symptoms
in the flowers the following spring. Nevertheless the fact remains
that under ordinary growing conditions the McFarlin shows decided,
often striking resistance to false blossom. The same degree of field
resistance would be a very valuable quality in any variety. Hoping
that the factors which make the McFarlin and Early Black distaste-
ful to the leafhopper might prove to be inheritable, we have been try-
ing for several years to cross them with other desirable varieties.
This present paper describes the methods used both in crossing the
flowers and growing the seeds, and includes a number of incidental
observations on blooming, pollination, etc., which may be of interest.
As the flower-bud stalks (or pedicels) first begin to lengthen and
carry the buds away from the upright in the spring, the buds are held
erect; but before the blossoming stage is reached the pedicels bend
over so that the buds are finally brought into an inverted position, and
the flowers and berries henceforth remain pendant. This is, of course,
Wilcox, R. B. Feeding preferences of the blunt-nosed leafhopper.
(American Cranberry Growers' Association. Jan. 31, 1931.)
' Goldsworthy, V. C. A preliminary report on cranberry false blossom in
Wisconsin, with special references to early literature as found in the Wis-
consin Growers' Reports. Wisconsin State Cranberry Growers' Association,
46th Annual Report, Jan., 1933.
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