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Bacterial Canker has become the primary concern for the block. An outbreak of Canker in 1998 has
forced us to alter our management practices. A series of Bordeaux sprays have been initiated in the fall
and pre-bud dormant periods begin the 1st week of September with Bordeaux mix and continue on a
bi-weekly schedule into dormancy, for a total of 5 fall applications.
A single Bordeaux spray is applied in the spring prior to bud swell, before switching to two
applications of Champ 2F (One at pink, and one at bloom).
Two applications of Champ 2F during the summer, one after the completion of harvest and one after
pruning rounds out the copper intensive spray regime.
Only summer pruning (post-harvest) was done in 99 (throughout the month of July) to minimize
wound entry points for canker that would be more active during the dormant pruning period. Another
tactic used is stub pruning on any mature wood, which further reduces the risk of a healthy tissue
infestation.
Although Bacterial Canker was fairly well controlled this year, a few late season strikes occurred on
Royalton in mid August to early Sept., before the fall Bordeaux applications began.
Hartland has not been affected by Bacterial Canker or Bacterial Leaf Spot thus far in the trials' life.
The humid conditions of the Northeast have also caused Bacterial Leaf Spot to be a disease we need to
be conscious of. Good Leaf Spot control was attained in 1999 with the application of Bravo
Weatherstick (1.2pt /100) on 8 July (one week post harvest) and Nova 40W (1.5 oz/100) two weeks
later.
All data has been collected for 1999. Leaf and soil samples were collected for analysis.
The dry conditions that persisted throughout the month of June made for ideal weather to properly
mature cherries. A maximum of roughly 1% of the crop suffered skin cracking, with a total 2-3% of
the early crop suffering from bird damage, while some of the later harvests have those numbers in the
5-7% range.
Hartland appears to be consistently the healthiest and most precocious variety in the block, with
Hartland on Gisela 7 (148-8) attaining the highest yields in this 1stseason of cropping.
Yield Data has not yet been compiled for the 1999 growing season.
Usefulness of Findings:
Cherries are a highly valued commodity that can only show promise in our area if some of the their
problems are addressed. Two of these include the bacterial diseases of leaf spot and canker. A steady
regime of copper sprays along with no dormant pruning has allowed us to bring both of these diseases
better under control.
Work Planned for Next Year:
Further evaluation and documentation the effectiveness of Bordeaux against Bacterial Canker and the
continued evaluation of the new Gisela rootstocks in combination with adaptable cultivars will continue
to be the focuses of this trial.
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