|
| |
| Name of Grower |
Vineyard Name/Age of vines |
Date and Type of Damage |
Date and Type of Damage |
| |
|
|
|
Bret Davis
Raymond, NE |
This is the 4th season for the vines; with an
additional 60 new Concords planted in grow tubes. |
5/3/04 - 100% kill of all buds. 50% of
the vines then started to rebud. 300 Edelweiss
75 Concord. |
5/15/04 - 50% kill of all buds that had
started to rebud after 5/3 freeze. To date, Concords
have the most rebudding after last kill. |
Page's Produce
Leon & Helen Page
1454 Jamestown
Waverly, NE 68462
402/786-2304
Store: 2455 Co. Rd 400
Valparaiso, NE
402/784-9302 |
|
Table Grapes: 'Mars' came through temps
of 26 degrees F, with little damage. 'Reliance' suffered more than
'Mars' at approximately 30% loss; 'Canadice' and 'Marquis' nearly 100% shoot
and cluster damage. |
|
Corky and Diana McCown
Greenglade
1400 E. Stagecoach Rd.
Martell, NE 68404
402/792-2779
greenglade1@uno.com |
Edelweiss Vines |
50% crop loss.
Coming back with secondary shoots, flower clusters |
|
Carroll Produce
Pat Carroll
444 Co. Rd 1900
Crete, NE 68333 |
Reliance, Concord Seedless, Himrod, Saturn,
Canadice, Glenora |
Reliance primary buds opened early, 100% loss
of primary; secondary buds developedwith good flower clusters. Concord
seedless, Himrod, Saturn, Canadice, Glenora, Interlaken all damaged by late
freeze-moderate to significant crop loss. |
|
URGENT MESSAGE FOR FREEZE AREAS THIS SPRING
Paul Read, University of
Nebraska-Lincoln
When spring temperatures are predicted to drop below freezing and warm
temperatures have caused bud-swell or bud-break (as often occurs in
Midwest vineyards in the late winter/early spring), overhead sprinkler
irrigation is one possible method to prevent damage to grapevine buds and
young shoots. Sprinkling must begin at the time that temperatures
approach 32 degrees Fahrenheit (0 degrees Celsius) and continue
irrigating until all ice melts off the plants in the morning following
the rise of ambient air temperatures to above freezing. If irrigation
ceases while ice still remains on the plant, as it thaws the ice will
take heat (calories) from the tissue it is enclosing and cause freeze
damage to those parts of the plants. Temperatures should be observed
in the immediate vicinity of the buds right in the vineyard -
do not rely on weather reports or data from a location other than in the
vineyard. This technique is likely to protect the tissues to temperatures
as low as 25 to 28 degrees Fahrenheit, possibly lower, depending on the
stage of bud development and the duration of the freeze event. A possible
problem that may result: excess moisture will accumulate in the vineyard
soil, especially if the soil is one that retains moisture or is already
at or approaching field capacity.
Additional approaches to prevention of freeze damage include direct heat
additions to the vineyard and use of wind machines to mix the layers of
different temperature air caused by an inversion frost event.
If using direct additions of heat, care must be taken to not damage
(burn) the vines by placing the heat source too close to the vines and if
using open burning of waste products such as old tires, waste oil, etc.,
it is important to check with local fire authorities about the legality
of open burning.
The cost and relative unavailability of wind machines (they look like
large fans) tend to make this practice difficult and/or uneconomic. Some
sources suggest that a minimum of 10 acres is required to make wind
machines economically feasible.
|
University of Nebraska
