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p r a c t i c a l w i n e r y & v i n e ya r d J U ly 2 0 1 4 63 g r a p e g r o w i n g 145 Jordan Street • San Rafael, CA 94901 • 415-457-3955 • Fax 457-0304 • www.boswellcompany.com Phenology Good Bad Water stress level Note Bud break Normal bleeding, Li le, spo y or delayed No stress Check soil moisture level, and bud break bleeding and bud break especially following dry winter Bloom to Good fruit set Poor fruit set, necro c None to mild stress Fer liza on is very fruit set inflorescense sensi ve to water stress Post-fruit set Controlled shoot Vigorous shoot growth, Water stress level Best and most cri cal to pre-véraison growth and lateral shoot growth depends on variety me to control shoot canopy size and produc on goal growth and berry size Véraison No shoot growth, Lateral shoot growth, Mild stress Adequate irriga on is to harvest healthy canopy early leaf yellowing, required to maintain healthy dehydrated berries canopy without encouraging lateral shoot growth Post-harvest No shoot growth, Lateral shoot growth, None to mild stress Refill the soil moisture healthy canopy collapsed canopy for over-wintering table Iv. Signs of vine growth for proper and ill- managed irrigation and water stress level of grapevines by phenological stages throughout the season. J. of Amer. Society for Hort. Science 117, 607– 611. 20. Jones, H.G. 2004. "Irrigation schedul- ing: advantages and pitfalls of plant- based methods." J. of Experimental Botany 55, 2427– 2436. 21. Jones, H.G. 2004 "Application of thermal imaging and infrared sensing in plant physiology and ecophysiol- ogy." Advances in Botanical Research 41, 107–163. 22. Chalmers, D.J. 1986 "Research and progress in cultural systems and man- agement in temperate fruit orchards." Acta Horticultura 175, 215–225. 23. Stoll, M., B. Loveys and P. Dry. 2000 "Hormonal changes induced by partial rootzone drying of irrigated grapevine." J. of Experimental Botany 51, 1627–1634. 24. Schultz, H.R. and M. Stoll. 2010 "Some critical issues in environmental physiology of grapevines: future chal- lenges and current limitations. " Aus. J. of Grape & Wine Research 16, 4–24. 25. des Gachons, C.P., C.van Leeuwen, T.S. Tominaga, G. Jean-Pierre and D.D. Jean-Pierre. 2005 "Influence of water and nitrogen deficit on fruit ripening and aroma potential of Vitis vinifera L cv Sauvignon blanc in field conditions." J. of the Science of Food & Agriculture 85, 73– 85. 26. Marais, J. 2001 "The significance of 1,1,6-trimethyl-1,2-dihydronaphthalene in the production of high quality Riesling wines." Carotenoid-Derived Aroma Compounds, American Chemical Society. 802, 273–284.