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Fengyun Zhao, Junli Sun, Songlin Yu, Huaifeng Liu and Kun Yu

water use efficiency ( Abuarab et al., 2013 ; Niu et al., 2013 ), but few reports have described the effects of aeration on soil microbial diversity, particularly that using SDI or SDI with tanks. At present, the grapes cultivated in greenhouses in

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Kevin Fort, Joaquin Fraga, Daniele Grossi and M. Andrew Walker

The use of rootstocks in viticulture was initiated in response to the widespread destruction of European vineyards after the inadvertent introduction of the grape phylloxera ( Daktulosphaira vitifoliae ) during the mid-19th century ( Ordish, 1972

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Fengyun Zhao, Yu Jiang, Xiufeng He, Huaifeng Liu and Kun Yu

Grape ( Vitis vinifera L.) has been grown for thousands of years. In 2016, the total planting area of grapes in China was ≈809,000 hm 2 ( Huang, 2017 ), of which Xinjiang accounted for 18.4% (or 149,000 hm 2 ). Since 1994, water-saving agriculture

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Justine E. Vanden Heuvel

Grapes. G.L. Creasy and L.L. Creasy. 2009. CAB International, CABI, Nosworthy Way, Wallingford, Oxfordshire OX10 8DE UK. 295 pages, with illustrations. $70.00. Softcover. ISBN-13: 978 1 845934019. Although grapes are one of the most widely

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Cynthia Fellman, Emily Hoover, Peter D. Ascher and James Luby

We evaluated the extent to which `Swenson Red' seeded grape (Vitis × spp.) responded to single and repeated GA3 applications to induce seedless fruit development. Field studies were conducted to test the time of pre-anthesis GA3 application (18, or 24 May or 3 June), the usefulness of postanthesis application, the optimum GA3 concentration (0, 0.075, 0.15, or 0.3 mm), and the method of application. The treatment dates that gave a high percentage of seedless berries with an acceptable berry count per cluster were 24 May with postanthesis application and 3 June pre-anthesis only. The optimum GA3 concentration was 0.15 mm applied both before and after anthesis. The most seedless berries developed when pre- and postanthesis applications were used, indicating many seedless fruit developed from flowers that would have abscised. There was no difference in percent heedlessness, number of berries per cluster, or number of seeds per berry between clusters dipped or sprayed with 0.3 mm GA3. Chemical uame used: gibberellic acid (GA3).

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R.M. Pool, R.M. Dunst and A.N. Lakso

1 Professor. 2 Research Support Specialist, Vineyard Laboratory, Fredonia, N.Y. Research was supported in part by grants from the New York State Grape Production Research Fund, Inc., and the New York Grape and Wine Foundation. We acknowledge the

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Akihiko Sato and Masahiko Yamada

The textural properties of grape berry flesh were evaluated with a puncture test using a total of 87 cultivars, consisting of 62 vinifera cultivars (Vitis vinifera L.) and 25 labruscana cultivars (Vitis labruscana Bailey) in order to search cultivars with crisp flesh texture for table grape breeding. Crisp texture is the most desirable texture for tableuse, and was determined as easy breakdown on mastication and firm flesh, which was measured as small deformation at the first major peak (DFP) and large maximum force (MF), respectively, in force-deformation curve of the test. For the vinifera cultivars, the mean values of DFP and MF were significantly smaller and larger in table-use cultivars than wine-use and dual-purpose cultivars, respectively. The result indicated that the vinifera wine-use and the dual-purpose cultivars had soft and non-crisp flesh. Based on the puncture tests, the cultivars with a crisp texture (2.5 mm ≥ for DFP and 0.9 N ≤ for MF) were limited to 11 vinifera table-use cultivars such as `Baladi', `Cardinal', and `Muscat of Alexandria'; and one vinifera dual-purpose cultivar (`Terbash'). The DFP was generally high in labruscana cultivars, which include table-use and dual-purpose cultivars, resulting in lacking cultivars with crisp texture among labruscana cultivars. These results indicate that the cultivars with a crisp texture were restricted to a small source within vinifera cultivars.

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Bin Cai, Cheng-Hui Li, Ai-Sheng Xiong, Ri-He Peng, Jun Zhou, Feng Gao, Zhen Zhang and Quan-Hong Yao

), DRTF ( Guo et al., 2006 ), and DPTF ( Zhu et al., 2007 ) have provided some comprehensive information on TF. Grape is one of the most important horticultural crops in the world, being used for the production of wine and juice, and as fresh and dried

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Rachel P. Naegele

et al., 2017 ). Chemical rotation or reducing the number of applications can slow, but not prevent, the development of resistant individuals. Botrytis -resistant grape cultivars are needed to complement chemical practices to develop a comprehensive

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Anne E. Connelly, Bernadine C. Strik, Jeffrey Granett and Glenn Fisher

134 POSTER SESSION 19 (Abstr. 788-809) Grapes