Title: Effect of summer pruning on bloom date, yield and fruit quality of 'Flordaking' peach
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 Material Information
Title: Effect of summer pruning on bloom date, yield and fruit quality of 'Flordaking' peach
Physical Description: Book
Creator: Andersen, Peter C.
Publisher: North Florida Research and Education Center, IFAS, University of Florida
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Bibliographic ID: UF00076558
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 154205922

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Summary. A study was initiated to determine the effect of summer

pruning on date of bloom, yield and quality of the frost-

susceptible peach variety 'Flordaking'. 'Flordaking' trees were

pruned on 27 June, 21 July, 10 August on 29 August 1989 on leaf

unpruned (control). Pruning consisted of removing large

watersprouts (typically 3-7) in the tree interior and topping

trees to a height of 6 feet. All trees were pruned during

February, 1990. Eight trees were subjected to each of the

pruning treatments. Variables measured during 1990 include:

1) tree height on 1 February; 2) percentage bloom on 1 February;

3) percentage of terminals with new growth (i.e. new growth after

summer pruning); 4) percentage of buds with bloom on terminal

growth; 5) yield per tree; 6) harvest index (i.e. percentage of

total yield at first harvest) and; 7) average fruit weight.

Variables were analyzed in a randomized block design.

Tree height (measured 1 Feb) was reduced by all dates of

summer pruning. As expected, the later the pruning date the

smaller the tree size.-(Table 1). Bloom was most delayed with the

27 June pruning date. Summer pruning in July or August did not


189
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-5b L North Florida Research and Education Center
IFAS University of Florida
90-- Rt. 4 Box 4092, Monticello, Florida 32344-9302
NFREC
Monticello Research Report 90-4

Effect of Summer Pruning on Bloom Date, Yiel ~'A uit Qual ty

of 'Flordaking' Peach 10 19


P. C. Andersen, AREC-Monticello








result in a later bloom. This was due to the fact that there was

insufficient time for flower initiation on terminals produced

after pruning in July or August. Flower bud development is

typically delayed in nodes located at near the apical portion of

shoots compared to a more basal nodes location or compared to

shoots located in the tree interior. The percentage of blooms on.

terminals was reduced by all dates of summer pruning due to both

bloom delay and an insufficient amount of time to allow for

flower bud initiation before the arrival of the dormant season.

No flower buds were initiated on terminals produced after the 29

August pruning date.

Yield varied from 27 to 38 kg (60 to 84 Ibs) per tree. The

lowest yield was recorded for the 27 June and 21 July pruning

date and the highest on the 10 August date. More data are

required for confirmation of trends in yields. Harvest index

(the percentage of fruit harvested at first picking) was not

significantly affected by summer pruning date, although the

latter dates were associated with a higher harvest index. Fruit

wt. varied relatively little as a function pruning date (60 to

65g). The small fruit size was a function of inadequate thinning

due to the risk of a spring frost almost until harvest.

In conclusion, more data are required to confirm these

trends although it appears that summer pruning may not only

reduce the amount of pruning time during the dormant season but

also may delay bloom. Early summer pruning resulted in the

greatest bloom delay; the 3 later pruning dates resulted in

terminal growth with few mature flower buds.











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