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Vincent Njung’e Michael, Yuqing Fu, and Geoffrey Meru

causal agent of foliar blight, root rot, fruit rot, and crown rot disease syndromes in cucurbits ( Babadoost, 2016 ). Phytophthora crown rot is particularly prevalent in fields prone to flooding, often resulting in total crop loss. Consequently, current

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Emmanuel A. Torres-Quezada, Lincoln Zotarelli, Vance M. Whitaker, Bielinski M. Santos, and Ixchel Hernandez-Ochoa

., 2004 ). Bare-root transplants are affordable to growers, but usually vary in crown size and overall quality ( Bish et al., 2000 ). Once bare-root transplants are shipped, a high proportion of roots become unable to take up water and nutrients, due to

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Uttara C. Samarakoon, Keith A. Funnell, David J. Woolley, Barbara A. Ambrose, and Ed R. Morgan

use preformed crown buds as part of the perennating structure. For use as an ornamental plant, floral productivity of gentians is associated with the growth and development of these crown buds ( Samarakoon et al., 2010 , 2012 ), and the timely

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Haley Hibbert-Frey, John Frampton, Frank A. Blazich, Doug Hundley, and L. Eric Hinesley

grafted in March or April when stock plants are dormant, a busy season for Christmas tree growers. Efforts to identify alternative grafting dates have been unsuccessful ( Hibbert-Frey et al., 2010 ). Origin of scion material within the tree crown might

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Oleg Daugovish, Mark Bolda, Sukhwinder Kaur, Maren J. Mochizuki, Daniel Marcum, and Lynn Epstein

-infested with C. acutatum and drip-irrigated; 3) non-infested and sprinkler-irrigated; and 4) non-infested and drip irrigated. Mother plants were thawed, infested when indicated by a 5-min dip of the roots and crowns in a suspension of 2.5 × 10 5 C. acutatum

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Michael D. Meyer and Mary K. Hausbeck

, 2004 ; Hwang and Kim, 1995 ). Phytophthora capsici causes fruit, crown, and root rot as well as foliar blight ( Babadoost, 2004 , 2005 ; Babadoost and Zitter, 2009 ; Hausbeck and Lamour, 2004 ). Phytophthora crown rot is particularly severe

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Karen K. Tanino and Ruojing Wang

× ananassa Duch.) crowns outperformed California-sourced crowns in each year from at least one Canadian-sourced location ( Tanino, 2002 ; Tanino et al., 2006). Because the highest prices of marketable strawberry fruit occur in the first 2 months of fruiting

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Kyle E. LaPlant, Gregory Vogel, Ella Reeves, Christine D. Smart, and Michael Mazourek

are cultivated for food as immature fruit (summer squash) and mature fruit (winter squash and processing pumpkins), and they are also grown for fall decorations, such as jack-o’-lanterns and gourds ( Paris, 2016 ). Phytophthora crown and root rot

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Nauja Lisa Jensen, Christian R. Jensen, Fulai Liu, and Karen K. Petersen

from Eq. 1 , where PW is the weight of the whole pot at permanent wilting (PW = 6080 g). Fig. 1. ( A ) Soil water content (θ), ( B ) relative leaf water content (RWC), ( C ) midday crown water potential (ψ crown ), ( D ) midday leaf water

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Sauveur Mahotiere, Clarence Johnson, and Philamenia Cullers


Dipping asparagus crowns (Asparagus officinalis L.) in 300 ppm dikegulac (Atrinal) solution significantly reduced the time of emergence and the height of asparagus shoots without affecting their fresh and dry weights. The number of shoots at complete emergence was not affected by the dikegulac treatment, but thereafter a significant increase occurred. Of the concentrations tested (0, 200, 300, and 400 ppm), 300 ppm was the most effective. After the top was cut off, the dikegulac treatment did not affect the time of emergence of the second shoots, but it did continue to increase their number. Chemical name used: 2,3:4,6-bis-O-(1-methylethylidene)-α-L-xylo-2-hexulofuranosonic acid (dikegulac).