Mechanical Canopy and Crop-Load Management of Pinot gris in a Warm Climate / (Record no. 3234)

000 -LEADER
fixed length control field 03095nma a2200241 4500
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 2013 eng
022 ## - INTERNATIONAL STANDARD SERIAL NUMBER
ISSN 0002-9254
040 ## - CATALOGING SOURCE
Transcribing agency Sonoma County Wine Library
041 ## -
-- eng
100 0# - MAIN ENTRY--PERSONAL NAME
Personal name Joseph P. Geller.
245 10 - TITLE STATEMENT
Title Mechanical Canopy and Crop-Load Management of Pinot gris in a Warm Climate /
Statement of responsibility, etc by Joseph P. Geller; S. Kaan Kurtural.
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Name of publisher, distributor, etc American Society for Enology and Viticulture,
Date of publication, distribution, etc 2013.
300 ## - PHYSICAL DESCRIPTION
Type Journal article
490 0# - JOURNAL TITLE
Title of the journal American Journal of Enology and Viticulture
520 ## - ABSTRACT
Abstract The interactive effects of mechanical canopy management on the optimum cropping level and Ravaz index of Pinot gris in a warm growing region were determined. The study examined two pruning methods, three shoot thinning treatments, and two leaf removal treatments arranged factorially in a randomized complete block design with four replications. The pruning methods were applied by either hand pruning to 23 nodes/m or mechanically hedging and retaining a 100 mm spur height. The shoot thinning treatments were applied mechanically at modified E-L stage 17 to retain 23 (low), 33 (medium), or 45 (high, not thinned) shoots/m of row. The leaf removal treatments removed leaves on the east side of the canopy in a 450 mm zone in the fruiting zone, 20 days postbloom with a mechanical deleafer or no leaf removal was done. The interaction of mechanical hedging and medium shoot thinning treatments reduced the contribution of noncount shoots to total shoots. Percent canopy gaps and photosynthetically active radiation increased, while canopy leaf layers decreased with the application of leaf removal regardless of pruning or shoot thinning regime in both years. Yield increased and berry and cluster weight decreased in both years with the application of mechanical hedging and medium shoot thinning compared to hand-pruned vines without any detrimental effects on fruit composition. To achieve the economic crop level threshold of 8.15 kg/m, a Ravaz index of 10.2 to 12.0 kg/kg was needed. This Ravaz index corresponded to a pruning weight of 0.82 to 0.92 kg/m. The study identified a mechanical hedging and shoot thinning method where a 100 mm spur height was retained during the dormant season and 35 shoots/m of row was retained at E-L stage 17 to optimize crop load without adversely affecting pruning weight or fruit composition in a warm climate. The identified method provided 79% labor operations cost savings compared to hand pruning alone.
700 0# - ADDED ENTRY-PERSONAL NAME
PERSONAL NAME S. Kaan Kurtural.
710 2# - ADDED ENTRY-CORPORATE NAME
CORPORATE NAME Former graduate student, current address, Associate Viticulturist, Treasury Wine Estates, 1000 Pratt Ave., St. Helena, CA 94574.
710 2# - ADDED ENTRY-CORPORATE NAME
CORPORATE NAME Department of Viticulture and Enology, 2360 East Barstow Ave., California State University Fresno, CA 93740;.
773 0# - SOURCE JOURNAL
Journal title American Journal of Enology and Viticulture.
Related parts (Vol.) 64. (No.) 1. 2013. (Pages.) 65-73.
Page numbers 65-73
Volume number 64
856 42 - ELECTRONIC LOCATION & ACCESS
URI http://ajevonline.org/content/64/1/65.abstract
991 ## - OAI IDENTIFIER
OAI set code AJEV
OAI set name American Journal of Enology and Viticulture
100 0# - MAIN ENTRY--PERSONAL NAME
-- 12063
700 0# - ADDED ENTRY-PERSONAL NAME
-- 22268
710 2# - ADDED ENTRY-CORPORATE NAME
-- 12065
710 2# - ADDED ENTRY-CORPORATE NAME
-- 12066
856 42 - ELECTRONIC LOCATION & ACCESS
-- Link to original article.

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